diff --git "a/bin/ffmpeg/configure" "b/bin/ffmpeg/configure"
new file mode 100644--- /dev/null
+++ "b/bin/ffmpeg/configure"
@@ -0,0 +1,8002 @@
+#!/bin/sh
+#
+# FFmpeg configure script
+#
+# Copyright (c) 2000-2002 Fabrice Bellard
+# Copyright (c) 2005-2008 Diego Biurrun
+# Copyright (c) 2005-2008 Mans Rullgard
+#
+
+# Prevent locale nonsense from breaking basic text processing.
+LC_ALL=C
+export LC_ALL
+
+# make sure we are running under a compatible shell
+# try to make this part work with most shells
+
+try_exec(){
+    echo "Trying shell $1"
+    type "$1" > /dev/null 2>&1 && exec "$@"
+}
+
+unset foo
+(: ${foo%%bar}) 2> /dev/null
+E1="$?"
+
+(: ${foo?}) 2> /dev/null
+E2="$?"
+
+if test "$E1" != 0 || test "$E2" = 0; then
+    echo "Broken shell detected.  Trying alternatives."
+    export FF_CONF_EXEC
+    if test "0$FF_CONF_EXEC" -lt 1; then
+        FF_CONF_EXEC=1
+        try_exec bash "$0" "$@"
+    fi
+    if test "0$FF_CONF_EXEC" -lt 2; then
+        FF_CONF_EXEC=2
+        try_exec ksh "$0" "$@"
+    fi
+    if test "0$FF_CONF_EXEC" -lt 3; then
+        FF_CONF_EXEC=3
+        try_exec /usr/xpg4/bin/sh "$0" "$@"
+    fi
+    echo "No compatible shell script interpreter found."
+    echo "This configure script requires a POSIX-compatible shell"
+    echo "such as bash or ksh."
+    echo "THIS IS NOT A BUG IN FFMPEG, DO NOT REPORT IT AS SUCH."
+    echo "Instead, install a working POSIX-compatible shell."
+    echo "Disabling this configure test will create a broken FFmpeg."
+    if test "$BASH_VERSION" = '2.04.0(1)-release'; then
+        echo "This bash version ($BASH_VERSION) is broken on your platform."
+        echo "Upgrade to a later version if available."
+    fi
+    exit 1
+fi
+
+test -d /usr/xpg4/bin && PATH=/usr/xpg4/bin:$PATH
+
+show_help(){
+    cat <<EOF
+Usage: configure [options]
+Options: [defaults in brackets after descriptions]
+
+Help options:
+  --help                   print this message
+  --quiet                  Suppress showing informative output
+  --list-decoders          show all available decoders
+  --list-encoders          show all available encoders
+  --list-hwaccels          show all available hardware accelerators
+  --list-demuxers          show all available demuxers
+  --list-muxers            show all available muxers
+  --list-parsers           show all available parsers
+  --list-protocols         show all available protocols
+  --list-bsfs              show all available bitstream filters
+  --list-indevs            show all available input devices
+  --list-outdevs           show all available output devices
+  --list-filters           show all available filters
+
+Standard options:
+  --logfile=FILE           log tests and output to FILE [ffbuild/config.log]
+  --disable-logging        do not log configure debug information
+  --fatal-warnings         fail if any configure warning is generated
+  --prefix=PREFIX          install in PREFIX [$prefix_default]
+  --bindir=DIR             install binaries in DIR [PREFIX/bin]
+  --datadir=DIR            install data files in DIR [PREFIX/share/ffmpeg]
+  --docdir=DIR             install documentation in DIR [PREFIX/share/doc/ffmpeg]
+  --libdir=DIR             install libs in DIR [PREFIX/lib]
+  --shlibdir=DIR           install shared libs in DIR [LIBDIR]
+  --incdir=DIR             install includes in DIR [PREFIX/include]
+  --mandir=DIR             install man page in DIR [PREFIX/share/man]
+  --pkgconfigdir=DIR       install pkg-config files in DIR [LIBDIR/pkgconfig]
+  --enable-rpath           use rpath to allow installing libraries in paths
+                           not part of the dynamic linker search path
+                           use rpath when linking programs (USE WITH CARE)
+  --install-name-dir=DIR   Darwin directory name for installed targets
+
+Licensing options:
+  --enable-gpl             allow use of GPL code, the resulting libs
+                           and binaries will be under GPL [no]
+  --enable-version3        upgrade (L)GPL to version 3 [no]
+  --enable-nonfree         allow use of nonfree code, the resulting libs
+                           and binaries will be unredistributable [no]
+
+Configuration options:
+  --disable-static         do not build static libraries [no]
+  --enable-shared          build shared libraries [no]
+  --enable-small           optimize for size instead of speed
+  --disable-runtime-cpudetect disable detecting CPU capabilities at runtime (smaller binary)
+  --enable-gray            enable full grayscale support (slower color)
+  --disable-swscale-alpha  disable alpha channel support in swscale
+  --disable-all            disable building components, libraries and programs
+  --disable-autodetect     disable automatically detected external libraries [no]
+
+Program options:
+  --disable-programs       do not build command line programs
+  --disable-ffmpeg         disable ffmpeg build
+  --disable-ffplay         disable ffplay build
+  --disable-ffprobe        disable ffprobe build
+
+Documentation options:
+  --disable-doc            do not build documentation
+  --disable-htmlpages      do not build HTML documentation pages
+  --disable-manpages       do not build man documentation pages
+  --disable-podpages       do not build POD documentation pages
+  --disable-txtpages       do not build text documentation pages
+
+Component options:
+  --disable-avdevice       disable libavdevice build
+  --disable-avcodec        disable libavcodec build
+  --disable-avformat       disable libavformat build
+  --disable-swresample     disable libswresample build
+  --disable-swscale        disable libswscale build
+  --disable-postproc       disable libpostproc build
+  --disable-avfilter       disable libavfilter build
+  --disable-pthreads       disable pthreads [autodetect]
+  --disable-w32threads     disable Win32 threads [autodetect]
+  --disable-os2threads     disable OS/2 threads [autodetect]
+  --disable-network        disable network support [no]
+  --disable-dct            disable DCT code
+  --disable-dwt            disable DWT code
+  --disable-error-resilience disable error resilience code
+  --disable-lsp            disable LSP code
+  --disable-mdct           disable MDCT code
+  --disable-rdft           disable RDFT code
+  --disable-fft            disable FFT code
+  --disable-faan           disable floating point AAN (I)DCT code
+  --disable-pixelutils     disable pixel utils in libavutil
+
+Individual component options:
+  --disable-everything     disable all components listed below
+  --disable-encoder=NAME   disable encoder NAME
+  --enable-encoder=NAME    enable encoder NAME
+  --disable-encoders       disable all encoders
+  --disable-decoder=NAME   disable decoder NAME
+  --enable-decoder=NAME    enable decoder NAME
+  --disable-decoders       disable all decoders
+  --disable-hwaccel=NAME   disable hwaccel NAME
+  --enable-hwaccel=NAME    enable hwaccel NAME
+  --disable-hwaccels       disable all hwaccels
+  --disable-muxer=NAME     disable muxer NAME
+  --enable-muxer=NAME      enable muxer NAME
+  --disable-muxers         disable all muxers
+  --disable-demuxer=NAME   disable demuxer NAME
+  --enable-demuxer=NAME    enable demuxer NAME
+  --disable-demuxers       disable all demuxers
+  --enable-parser=NAME     enable parser NAME
+  --disable-parser=NAME    disable parser NAME
+  --disable-parsers        disable all parsers
+  --enable-bsf=NAME        enable bitstream filter NAME
+  --disable-bsf=NAME       disable bitstream filter NAME
+  --disable-bsfs           disable all bitstream filters
+  --enable-protocol=NAME   enable protocol NAME
+  --disable-protocol=NAME  disable protocol NAME
+  --disable-protocols      disable all protocols
+  --enable-indev=NAME      enable input device NAME
+  --disable-indev=NAME     disable input device NAME
+  --disable-indevs         disable input devices
+  --enable-outdev=NAME     enable output device NAME
+  --disable-outdev=NAME    disable output device NAME
+  --disable-outdevs        disable output devices
+  --disable-devices        disable all devices
+  --enable-filter=NAME     enable filter NAME
+  --disable-filter=NAME    disable filter NAME
+  --disable-filters        disable all filters
+
+External library support:
+
+  Using any of the following switches will allow FFmpeg to link to the
+  corresponding external library. All the components depending on that library
+  will become enabled, if all their other dependencies are met and they are not
+  explicitly disabled. E.g. --enable-libopus will enable linking to
+  libopus and allow the libopus encoder to be built, unless it is
+  specifically disabled with --disable-encoder=libopus.
+
+  Note that only the system libraries are auto-detected. All the other external
+  libraries must be explicitly enabled.
+
+  Also note that the following help text describes the purpose of the libraries
+  themselves, not all their features will necessarily be usable by FFmpeg.
+
+  --disable-alsa           disable ALSA support [autodetect]
+  --disable-appkit         disable Apple AppKit framework [autodetect]
+  --disable-avfoundation   disable Apple AVFoundation framework [autodetect]
+  --enable-avisynth        enable reading of AviSynth script files [no]
+  --disable-bzlib          disable bzlib [autodetect]
+  --disable-coreimage      disable Apple CoreImage framework [autodetect]
+  --enable-chromaprint     enable audio fingerprinting with chromaprint [no]
+  --enable-frei0r          enable frei0r video filtering [no]
+  --enable-gcrypt          enable gcrypt, needed for rtmp(t)e support
+                           if openssl, librtmp or gmp is not used [no]
+  --enable-gmp             enable gmp, needed for rtmp(t)e support
+                           if openssl or librtmp is not used [no]
+  --enable-gnutls          enable gnutls, needed for https support
+                           if openssl, libtls or mbedtls is not used [no]
+  --disable-iconv          disable iconv [autodetect]
+  --enable-jni             enable JNI support [no]
+  --enable-ladspa          enable LADSPA audio filtering [no]
+  --enable-lcms2           enable ICC profile support via LittleCMS 2 [no]
+  --enable-libaom          enable AV1 video encoding/decoding via libaom [no]
+  --enable-libaribb24      enable ARIB text and caption decoding via libaribb24 [no]
+  --enable-libass          enable libass subtitles rendering,
+                           needed for subtitles and ass filter [no]
+  --enable-libbluray       enable BluRay reading using libbluray [no]
+  --enable-libbs2b         enable bs2b DSP library [no]
+  --enable-libcaca         enable textual display using libcaca [no]
+  --enable-libcelt         enable CELT decoding via libcelt [no]
+  --enable-libcdio         enable audio CD grabbing with libcdio [no]
+  --enable-libcodec2       enable codec2 en/decoding using libcodec2 [no]
+  --enable-libdav1d        enable AV1 decoding via libdav1d [no]
+  --enable-libdavs2        enable AVS2 decoding via libdavs2 [no]
+  --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394
+                           and libraw1394 [no]
+  --enable-libfdk-aac      enable AAC de/encoding via libfdk-aac [no]
+  --enable-libflite        enable flite (voice synthesis) support via libflite [no]
+  --enable-libfontconfig   enable libfontconfig, useful for drawtext filter [no]
+  --enable-libfreetype     enable libfreetype, needed for drawtext filter [no]
+  --enable-libfribidi      enable libfribidi, improves drawtext filter [no]
+  --enable-libglslang      enable GLSL->SPIRV compilation via libglslang [no]
+  --enable-libgme          enable Game Music Emu via libgme [no]
+  --enable-libgsm          enable GSM de/encoding via libgsm [no]
+  --enable-libiec61883     enable iec61883 via libiec61883 [no]
+  --enable-libilbc         enable iLBC de/encoding via libilbc [no]
+  --enable-libjack         enable JACK audio sound server [no]
+  --enable-libjxl          enable JPEG XL de/encoding via libjxl [no]
+  --enable-libklvanc       enable Kernel Labs VANC processing [no]
+  --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
+  --enable-liblensfun      enable lensfun lens correction [no]
+  --enable-libmodplug      enable ModPlug via libmodplug [no]
+  --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
+  --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
+  --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
+  --enable-libopencv       enable video filtering via libopencv [no]
+  --enable-libopenh264     enable H.264 encoding via OpenH264 [no]
+  --enable-libopenjpeg     enable JPEG 2000 de/encoding via OpenJPEG [no]
+  --enable-libopenmpt      enable decoding tracked files via libopenmpt [no]
+  --enable-libopenvino     enable OpenVINO as a DNN module backend
+                           for DNN based filters like dnn_processing [no]
+  --enable-libopus         enable Opus de/encoding via libopus [no]
+  --enable-libplacebo      enable libplacebo library [no]
+  --enable-libpulse        enable Pulseaudio input via libpulse [no]
+  --enable-librabbitmq     enable RabbitMQ library [no]
+  --enable-librav1e        enable AV1 encoding via rav1e [no]
+  --enable-librist         enable RIST via librist [no]
+  --enable-librsvg         enable SVG rasterization via librsvg [no]
+  --enable-librubberband   enable rubberband needed for rubberband filter [no]
+  --enable-librtmp         enable RTMP[E] support via librtmp [no]
+  --enable-libshaderc      enable GLSL->SPIRV compilation via libshaderc [no]
+  --enable-libshine        enable fixed-point MP3 encoding via libshine [no]
+  --enable-libsmbclient    enable Samba protocol via libsmbclient [no]
+  --enable-libsnappy       enable Snappy compression, needed for hap encoding [no]
+  --enable-libsoxr         enable Include libsoxr resampling [no]
+  --enable-libspeex        enable Speex de/encoding via libspeex [no]
+  --enable-libsrt          enable Haivision SRT protocol via libsrt [no]
+  --enable-libssh          enable SFTP protocol via libssh [no]
+  --enable-libsvtav1       enable AV1 encoding via SVT [no]
+  --enable-libtensorflow   enable TensorFlow as a DNN module backend
+                           for DNN based filters like sr [no]
+  --enable-libtesseract    enable Tesseract, needed for ocr filter [no]
+  --enable-libtheora       enable Theora encoding via libtheora [no]
+  --enable-libtls          enable LibreSSL (via libtls), needed for https support
+                           if openssl, gnutls or mbedtls is not used [no]
+  --enable-libtwolame      enable MP2 encoding via libtwolame [no]
+  --enable-libuavs3d       enable AVS3 decoding via libuavs3d [no]
+  --enable-libv4l2         enable libv4l2/v4l-utils [no]
+  --enable-libvidstab      enable video stabilization using vid.stab [no]
+  --enable-libvmaf         enable vmaf filter via libvmaf [no]
+  --enable-libvo-amrwbenc  enable AMR-WB encoding via libvo-amrwbenc [no]
+  --enable-libvorbis       enable Vorbis en/decoding via libvorbis,
+                           native implementation exists [no]
+  --enable-libvpx          enable VP8 and VP9 de/encoding via libvpx [no]
+  --enable-libwebp         enable WebP encoding via libwebp [no]
+  --enable-libx264         enable H.264 encoding via x264 [no]
+  --enable-libx265         enable HEVC encoding via x265 [no]
+  --enable-libxavs         enable AVS encoding via xavs [no]
+  --enable-libxavs2        enable AVS2 encoding via xavs2 [no]
+  --enable-libxcb          enable X11 grabbing using XCB [autodetect]
+  --enable-libxcb-shm      enable X11 grabbing shm communication [autodetect]
+  --enable-libxcb-xfixes   enable X11 grabbing mouse rendering [autodetect]
+  --enable-libxcb-shape    enable X11 grabbing shape rendering [autodetect]
+  --enable-libxvid         enable Xvid encoding via xvidcore,
+                           native MPEG-4/Xvid encoder exists [no]
+  --enable-libxml2         enable XML parsing using the C library libxml2, needed
+                           for dash and imf demuxing support [no]
+  --enable-libzimg         enable z.lib, needed for zscale filter [no]
+  --enable-libzmq          enable message passing via libzmq [no]
+  --enable-libzvbi         enable teletext support via libzvbi [no]
+  --enable-lv2             enable LV2 audio filtering [no]
+  --disable-lzma           disable lzma [autodetect]
+  --enable-decklink        enable Blackmagic DeckLink I/O support [no]
+  --enable-mbedtls         enable mbedTLS, needed for https support
+                           if openssl, gnutls or libtls is not used [no]
+  --enable-mediacodec      enable Android MediaCodec support [no]
+  --enable-mediafoundation enable encoding via MediaFoundation [auto]
+  --disable-metal          disable Apple Metal framework [autodetect]
+  --enable-libmysofa       enable libmysofa, needed for sofalizer filter [no]
+  --enable-openal          enable OpenAL 1.1 capture support [no]
+  --enable-opencl          enable OpenCL processing [no]
+  --enable-opengl          enable OpenGL rendering [no]
+  --enable-openssl         enable openssl, needed for https support
+                           if gnutls, libtls or mbedtls is not used [no]
+  --enable-pocketsphinx    enable PocketSphinx, needed for asr filter [no]
+  --disable-sndio          disable sndio support [autodetect]
+  --disable-schannel       disable SChannel SSP, needed for TLS support on
+                           Windows if openssl and gnutls are not used [autodetect]
+  --disable-sdl2           disable sdl2 [autodetect]
+  --disable-securetransport disable Secure Transport, needed for TLS support
+                           on OSX if openssl and gnutls are not used [autodetect]
+  --enable-vapoursynth     enable VapourSynth demuxer [no]
+  --disable-vulkan         disable Vulkan code [autodetect]
+  --disable-xlib           disable xlib [autodetect]
+  --disable-zlib           disable zlib [autodetect]
+
+  The following libraries provide various hardware acceleration features:
+  --disable-amf            disable AMF video encoding code [autodetect]
+  --disable-audiotoolbox   disable Apple AudioToolbox code [autodetect]
+  --enable-cuda-nvcc       enable Nvidia CUDA compiler [no]
+  --disable-cuda-llvm      disable CUDA compilation using clang [autodetect]
+  --disable-cuvid          disable Nvidia CUVID support [autodetect]
+  --disable-d3d11va        disable Microsoft Direct3D 11 video acceleration code [autodetect]
+  --disable-dxva2          disable Microsoft DirectX 9 video acceleration code [autodetect]
+  --disable-ffnvcodec      disable dynamically linked Nvidia code [autodetect]
+  --enable-libdrm          enable DRM code (Linux) [no]
+  --enable-libmfx          enable Intel MediaSDK (AKA Quick Sync Video) code via libmfx [no]
+  --enable-libvpl          enable Intel oneVPL code via libvpl if libmfx is not used [no]
+  --enable-libnpp          enable Nvidia Performance Primitives-based code [no]
+  --enable-mmal            enable Broadcom Multi-Media Abstraction Layer (Raspberry Pi) via MMAL [no]
+  --disable-nvdec          disable Nvidia video decoding acceleration (via hwaccel) [autodetect]
+  --disable-nvenc          disable Nvidia video encoding code [autodetect]
+  --enable-omx             enable OpenMAX IL code [no]
+  --enable-omx-rpi         enable OpenMAX IL code for Raspberry Pi [no]
+  --enable-rkmpp           enable Rockchip Media Process Platform code [no]
+  --disable-v4l2-m2m       disable V4L2 mem2mem code [autodetect]
+  --disable-vaapi          disable Video Acceleration API (mainly Unix/Intel) code [autodetect]
+  --disable-vdpau          disable Nvidia Video Decode and Presentation API for Unix code [autodetect]
+  --disable-videotoolbox   disable VideoToolbox code [autodetect]
+
+Toolchain options:
+  --arch=ARCH              select architecture [$arch]
+  --cpu=CPU                select the minimum required CPU (affects
+                           instruction selection, may crash on older CPUs)
+  --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]
+  --progs-suffix=SUFFIX    program name suffix []
+  --enable-cross-compile   assume a cross-compiler is used
+  --sysroot=PATH           root of cross-build tree
+  --sysinclude=PATH        location of cross-build system headers
+  --target-os=OS           compiler targets OS [$target_os]
+  --target-exec=CMD        command to run executables on target
+  --target-path=DIR        path to view of build directory on target
+  --target-samples=DIR     path to samples directory on target
+  --tempprefix=PATH        force fixed dir/prefix instead of mktemp for checks
+  --toolchain=NAME         set tool defaults according to NAME
+                           (gcc-asan, clang-asan, gcc-msan, clang-msan,
+                           gcc-tsan, clang-tsan, gcc-usan, clang-usan,
+                           valgrind-massif, valgrind-memcheck,
+                           msvc, icl, gcov, llvm-cov, hardened)
+  --nm=NM                  use nm tool NM [$nm_default]
+  --ar=AR                  use archive tool AR [$ar_default]
+  --as=AS                  use assembler AS [$as_default]
+  --ln_s=LN_S              use symbolic link tool LN_S [$ln_s_default]
+  --strip=STRIP            use strip tool STRIP [$strip_default]
+  --windres=WINDRES        use windows resource compiler WINDRES [$windres_default]
+  --x86asmexe=EXE          use nasm-compatible assembler EXE [$x86asmexe_default]
+  --cc=CC                  use C compiler CC [$cc_default]
+  --cxx=CXX                use C compiler CXX [$cxx_default]
+  --objcc=OCC              use ObjC compiler OCC [$cc_default]
+  --dep-cc=DEPCC           use dependency generator DEPCC [$cc_default]
+  --nvcc=NVCC              use Nvidia CUDA compiler NVCC or clang [$nvcc_default]
+  --ld=LD                  use linker LD [$ld_default]
+  --metalcc=METALCC        use metal compiler METALCC [$metalcc_default]
+  --metallib=METALLIB      use metal linker METALLIB [$metallib_default]
+  --pkg-config=PKGCONFIG   use pkg-config tool PKGCONFIG [$pkg_config_default]
+  --pkg-config-flags=FLAGS pass additional flags to pkgconf []
+  --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
+  --doxygen=DOXYGEN        use DOXYGEN to generate API doc [$doxygen_default]
+  --host-cc=HOSTCC         use host C compiler HOSTCC
+  --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
+  --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
+  --host-ld=HOSTLD         use host linker HOSTLD
+  --host-ldflags=HLDFLAGS  use HLDFLAGS when linking for host
+  --host-extralibs=HLIBS   use libs HLIBS when linking for host
+  --host-os=OS             compiler host OS [$target_os]
+  --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS [$CFLAGS]
+  --extra-cxxflags=ECFLAGS add ECFLAGS to CXXFLAGS [$CXXFLAGS]
+  --extra-objcflags=FLAGS  add FLAGS to OBJCFLAGS [$CFLAGS]
+  --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]
+  --extra-ldexeflags=ELDFLAGS add ELDFLAGS to LDEXEFLAGS [$LDEXEFLAGS]
+  --extra-ldsoflags=ELDFLAGS add ELDFLAGS to LDSOFLAGS [$LDSOFLAGS]
+  --extra-libs=ELIBS       add ELIBS [$ELIBS]
+  --extra-version=STRING   version string suffix []
+  --optflags=OPTFLAGS      override optimization-related compiler flags
+  --nvccflags=NVCCFLAGS    override nvcc flags [$nvccflags_default]
+  --build-suffix=SUFFIX    library name suffix []
+  --enable-pic             build position-independent code
+  --enable-thumb           compile for Thumb instruction set
+  --enable-lto             use link-time optimization
+  --env="ENV=override"     override the environment variables
+
+Advanced options (experts only):
+  --malloc-prefix=PREFIX   prefix malloc and related names with PREFIX
+  --custom-allocator=NAME  use a supported custom allocator
+  --disable-symver         disable symbol versioning
+  --enable-hardcoded-tables use hardcoded tables instead of runtime generation
+  --disable-safe-bitstream-reader
+                           disable buffer boundary checking in bitreaders
+                           (faster, but may crash)
+  --sws-max-filter-size=N  the max filter size swscale uses [$sws_max_filter_size_default]
+
+Optimization options (experts only):
+  --disable-asm            disable all assembly optimizations
+  --disable-altivec        disable AltiVec optimizations
+  --disable-vsx            disable VSX optimizations
+  --disable-power8         disable POWER8 optimizations
+  --disable-amd3dnow       disable 3DNow! optimizations
+  --disable-amd3dnowext    disable 3DNow! extended optimizations
+  --disable-mmx            disable MMX optimizations
+  --disable-mmxext         disable MMXEXT optimizations
+  --disable-sse            disable SSE optimizations
+  --disable-sse2           disable SSE2 optimizations
+  --disable-sse3           disable SSE3 optimizations
+  --disable-ssse3          disable SSSE3 optimizations
+  --disable-sse4           disable SSE4 optimizations
+  --disable-sse42          disable SSE4.2 optimizations
+  --disable-avx            disable AVX optimizations
+  --disable-xop            disable XOP optimizations
+  --disable-fma3           disable FMA3 optimizations
+  --disable-fma4           disable FMA4 optimizations
+  --disable-avx2           disable AVX2 optimizations
+  --disable-avx512         disable AVX-512 optimizations
+  --disable-avx512icl      disable AVX-512ICL optimizations
+  --disable-aesni          disable AESNI optimizations
+  --disable-armv5te        disable armv5te optimizations
+  --disable-armv6          disable armv6 optimizations
+  --disable-armv6t2        disable armv6t2 optimizations
+  --disable-vfp            disable VFP optimizations
+  --disable-neon           disable NEON optimizations
+  --disable-inline-asm     disable use of inline assembly
+  --disable-x86asm         disable use of standalone x86 assembly
+  --disable-mipsdsp        disable MIPS DSP ASE R1 optimizations
+  --disable-mipsdspr2      disable MIPS DSP ASE R2 optimizations
+  --disable-msa            disable MSA optimizations
+  --disable-mipsfpu        disable floating point MIPS optimizations
+  --disable-mmi            disable Loongson MMI optimizations
+  --disable-lsx            disable Loongson LSX optimizations
+  --disable-lasx           disable Loongson LASX optimizations
+  --disable-rvv            disable RISC-V Vector optimizations
+  --disable-fast-unaligned consider unaligned accesses slow
+
+Developer options (useful when working on FFmpeg itself):
+  --disable-debug          disable debugging symbols
+  --enable-debug=LEVEL     set the debug level [$debuglevel]
+  --disable-optimizations  disable compiler optimizations
+  --enable-extra-warnings  enable more compiler warnings
+  --disable-stripping      disable stripping of executables and shared libraries
+  --assert-level=level     0(default), 1 or 2, amount of assertion testing,
+                           2 causes a slowdown at runtime.
+  --enable-memory-poisoning fill heap uninitialized allocated space with arbitrary data
+  --valgrind=VALGRIND      run "make fate" tests through valgrind to detect memory
+                           leaks and errors, using the specified valgrind binary.
+                           Cannot be combined with --target-exec
+  --enable-ftrapv          Trap arithmetic overflows
+  --samples=PATH           location of test samples for FATE, if not set use
+                           \$FATE_SAMPLES at make invocation time.
+  --enable-neon-clobber-test check NEON registers for clobbering (should be
+                           used only for debugging purposes)
+  --enable-xmm-clobber-test check XMM registers for clobbering (Win64-only;
+                           should be used only for debugging purposes)
+  --enable-random          randomly enable/disable components
+  --disable-random
+  --enable-random=LIST     randomly enable/disable specific components or
+  --disable-random=LIST    component groups. LIST is a comma-separated list
+                           of NAME[:PROB] entries where NAME is a component
+                           (group) and PROB the probability associated with
+                           NAME (default 0.5).
+  --random-seed=VALUE      seed value for --enable/disable-random
+  --disable-valgrind-backtrace do not print a backtrace under Valgrind
+                           (only applies to --disable-optimizations builds)
+  --enable-ossfuzz         Enable building fuzzer tool
+  --libfuzzer=PATH         path to libfuzzer
+  --ignore-tests=TESTS     comma-separated list (without "fate-" prefix
+                           in the name) of tests whose result is ignored
+  --enable-linux-perf      enable Linux Performance Monitor API
+  --enable-macos-kperf     enable macOS kperf (private) API
+  --disable-large-tests    disable tests that use a large amount of memory
+  --disable-ptx-compression don't compress CUDA PTX code even when possible
+
+NOTE: Object files are built at the place where configure is launched.
+EOF
+  exit 0
+}
+
+if test -t 1 && which tput >/dev/null 2>&1; then
+    ncolors=$(tput colors)
+    if test -n "$ncolors" && test $ncolors -ge 8; then
+        bold_color=$(tput bold)
+        warn_color=$(tput setaf 3)
+        error_color=$(tput setaf 1)
+        reset_color=$(tput sgr0)
+    fi
+    # 72 used instead of 80 since that's the default of pr
+    ncols=$(tput cols)
+fi
+: ${ncols:=72}
+
+log(){
+    echo "$@" >> $logfile
+}
+
+log_file(){
+    log BEGIN "$1"
+    log_file_i=1
+    while IFS= read -r log_file_line; do
+        printf '%5d\t%s\n' "$log_file_i" "$log_file_line"
+        log_file_i=$(($log_file_i+1))
+    done < "$1" >> "$logfile"
+    log END "$1"
+}
+
+warn(){
+    log "WARNING: $*"
+    WARNINGS="${WARNINGS}WARNING: $*\n"
+}
+
+die(){
+    log "$@"
+    echo "$error_color$bold_color$@$reset_color"
+    cat <<EOF
+
+If you think configure made a mistake, make sure you are using the latest
+version from Git.  If the latest version fails, report the problem to the
+ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.libera.chat.
+EOF
+    if disabled logging; then
+        cat <<EOF
+Rerun configure with logging enabled (do not use --disable-logging), and
+include the log this produces with your report.
+EOF
+    else
+        cat <<EOF
+Include the log file "$logfile" produced by configure as this will help
+solve the problem.
+EOF
+    fi
+    exit 1
+}
+
+# Avoid locale weirdness, besides we really just want to translate ASCII.
+toupper(){
+    echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
+}
+
+tolower(){
+    echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
+}
+
+c_escape(){
+    echo "$*" | sed 's/["\\]/\\\0/g'
+}
+
+sh_quote(){
+    v=$(echo "$1" | sed "s/'/'\\\\''/g")
+    test "x$v" = "x${v#*[!A-Za-z0-9_/.+-]}" || v="'$v'"
+    echo "$v"
+}
+
+cleanws(){
+    echo "$@" | sed 's/^ *//;s/[[:space:]][[:space:]]*/ /g;s/ *$//'
+}
+
+filter(){
+    pat=$1
+    shift
+    for v; do
+        eval "case '$v' in $pat) printf '%s ' '$v' ;; esac"
+    done
+}
+
+filter_out(){
+    pat=$1
+    shift
+    for v; do
+        eval "case '$v' in $pat) ;; *) printf '%s ' '$v' ;; esac"
+    done
+}
+
+map(){
+    m=$1
+    shift
+    for v; do eval $m; done
+}
+
+add_suffix(){
+    suffix=$1
+    shift
+    for v; do echo ${v}${suffix}; done
+}
+
+remove_suffix(){
+    suffix=$1
+    shift
+    for v; do echo ${v%$suffix}; done
+}
+
+set_all(){
+    value=$1
+    shift
+    for var in $*; do
+        eval $var=$value
+    done
+}
+
+set_weak(){
+    value=$1
+    shift
+    for var; do
+        eval : \${$var:=$value}
+    done
+}
+
+sanitize_var_name(){
+    echo $@ | sed 's/[^A-Za-z0-9_]/_/g'
+}
+
+set_sanitized(){
+    var=$1
+    shift
+    eval $(sanitize_var_name "$var")='$*'
+}
+
+get_sanitized(){
+    eval echo \$$(sanitize_var_name "$1")
+}
+
+pushvar(){
+    for pvar in $*; do
+        eval level=\${${pvar}_level:=0}
+        eval ${pvar}_${level}="\$$pvar"
+        eval ${pvar}_level=$(($level+1))
+    done
+}
+
+popvar(){
+    for pvar in $*; do
+        eval level=\${${pvar}_level:-0}
+        test $level = 0 && continue
+        eval level=$(($level-1))
+        eval $pvar="\${${pvar}_${level}}"
+        eval ${pvar}_level=$level
+        eval unset ${pvar}_${level}
+    done
+}
+
+request(){
+    for var in $*; do
+        eval ${var}_requested=yes
+        eval $var=
+    done
+}
+
+warn_if_gets_disabled(){
+    for var in $*; do
+        WARN_IF_GETS_DISABLED_LIST="$WARN_IF_GETS_DISABLED_LIST $var"
+    done
+}
+
+enable(){
+    set_all yes $*
+}
+
+disable(){
+    set_all no $*
+}
+
+disable_with_reason(){
+    disable $1
+    eval "${1}_disable_reason=\"$2\""
+    if requested $1; then
+        die "ERROR: $1 requested, but $2"
+    fi
+}
+
+enable_weak(){
+    set_weak yes $*
+}
+
+disable_weak(){
+    set_weak no $*
+}
+
+enable_sanitized(){
+    for var; do
+        enable $(sanitize_var_name $var)
+    done
+}
+
+disable_sanitized(){
+    for var; do
+        disable $(sanitize_var_name $var)
+    done
+}
+
+do_enable_deep(){
+    for var; do
+        enabled $var && continue
+        set -- $var
+        eval enable_deep \$${var}_select
+        var=$1
+        eval enable_deep_weak \$${var}_suggest
+    done
+}
+
+enable_deep(){
+    do_enable_deep $*
+    enable $*
+}
+
+enable_deep_weak(){
+    for var; do
+        disabled $var && continue
+        set -- $var
+        do_enable_deep $var
+        var=$1
+        enable_weak $var
+    done
+}
+
+requested(){
+    test "${1#!}" = "$1" && op="=" || op="!="
+    eval test "x\$${1#!}_requested" $op "xyes"
+}
+
+enabled(){
+    test "${1#!}" = "$1" && op="=" || op="!="
+    eval test "x\$${1#!}" $op "xyes"
+}
+
+disabled(){
+    test "${1#!}" = "$1" && op="=" || op="!="
+    eval test "x\$${1#!}" $op "xno"
+}
+
+enabled_all(){
+    for opt; do
+        enabled $opt || return 1
+    done
+}
+
+disabled_all(){
+    for opt; do
+        disabled $opt || return 1
+    done
+}
+
+enabled_any(){
+    for opt; do
+        enabled $opt && return 0
+    done
+}
+
+disabled_any(){
+    for opt; do
+        disabled $opt && return 0
+    done
+    return 1
+}
+
+set_default(){
+    for opt; do
+        eval : \${$opt:=\$${opt}_default}
+    done
+}
+
+is_in(){
+    value=$1
+    shift
+    for var in $*; do
+        [ $var = $value ] && return 0
+    done
+    return 1
+}
+
+# The cfg loop is very hot (several thousands iterations), and in bash also
+# potentialy quite slow. Try to abort the iterations early, preferably without
+# calling functions. 70%+ of the time cfg is already done or without deps.
+check_deps(){
+    for cfg; do
+        eval [ x\$${cfg}_checking = xdone ] && continue
+        eval [ x\$${cfg}_checking = xinprogress ] && die "Circular dependency for $cfg."
+
+        eval "
+        dep_all=\$${cfg}_deps
+        dep_any=\$${cfg}_deps_any
+        dep_con=\$${cfg}_conflict
+        dep_sel=\$${cfg}_select
+        dep_sgs=\$${cfg}_suggest
+        dep_ifa=\$${cfg}_if
+        dep_ifn=\$${cfg}_if_any
+        "
+
+        # most of the time here $cfg has no deps - avoid costly no-op work
+        if [ "$dep_all$dep_any$dep_con$dep_sel$dep_sgs$dep_ifa$dep_ifn" ]; then
+            eval ${cfg}_checking=inprogress
+
+            set -- $cfg "$dep_all" "$dep_any" "$dep_con" "$dep_sel" "$dep_sgs" "$dep_ifa" "$dep_ifn"
+            check_deps $dep_all $dep_any $dep_con $dep_sel $dep_sgs $dep_ifa $dep_ifn
+            cfg=$1; dep_all=$2; dep_any=$3; dep_con=$4; dep_sel=$5 dep_sgs=$6; dep_ifa=$7; dep_ifn=$8
+
+            [ -n "$dep_ifa" ] && { enabled_all $dep_ifa && enable_weak $cfg; }
+            [ -n "$dep_ifn" ] && { enabled_any $dep_ifn && enable_weak $cfg; }
+            enabled_all  $dep_all || { disable_with_reason $cfg "not all dependencies are satisfied: $dep_all"; }
+            enabled_any  $dep_any || { disable_with_reason $cfg "not any dependency is satisfied: $dep_any"; }
+            disabled_all $dep_con || { disable_with_reason $cfg "some conflicting dependencies are unsatisfied: $dep_con"; }
+            disabled_any $dep_sel && { disable_with_reason $cfg "some selected dependency is unsatisfied: $dep_sel"; }
+
+            enabled $cfg && enable_deep_weak $dep_sel $dep_sgs
+
+            for dep in $dep_all $dep_any $dep_sel $dep_sgs; do
+                # filter out library deps, these do not belong in extralibs
+                is_in $dep $LIBRARY_LIST && continue
+                enabled $dep && eval append ${cfg}_extralibs ${dep}_extralibs
+            done
+        fi
+
+        eval ${cfg}_checking=done
+    done
+}
+
+print_config(){
+    pfx=$1
+    files=$2
+    shift 2
+    map 'eval echo "$v \${$v:-no}"' "$@" |
+    awk "BEGIN { split(\"$files\", files) }
+        {
+            c = \"$pfx\" toupper(\$1);
+            v = \$2;
+            sub(/yes/, 1, v);
+            sub(/no/,  0, v);
+            for (f in files) {
+                file = files[f];
+                if (file ~ /\\.h\$/) {
+                    printf(\"#define %s %d\\n\", c, v) >>file;
+                } else if (file ~ /\\.asm\$/) {
+                    printf(\"%%define %s %d\\n\", c, v) >>file;
+                } else if (file ~ /\\.mak\$/) {
+                    n = -v ? \"\" : \"!\";
+                    printf(\"%s%s=yes\\n\", n, c) >>file;
+                } else if (file ~ /\\.texi\$/) {
+                    pre = -v ? \"\" : \"@c \";
+                    yesno = \$2;
+                    c2 = tolower(c);
+                    gsub(/_/, \"-\", c2);
+                    printf(\"%s@set %s %s\\n\", pre, c2, yesno) >>file;
+                }
+            }
+        }"
+}
+
+print_enabled(){
+    suf=$1
+    shift
+    for v; do
+        enabled $v && printf "%s\n" ${v%$suf}
+    done
+}
+
+append(){
+    var=$1
+    shift
+    eval "$var=\"\$$var $*\""
+}
+
+prepend(){
+    var=$1
+    shift
+    eval "$var=\"$* \$$var\""
+}
+
+reverse () {
+    eval '
+        reverse_out=
+        for v in $'$1'; do
+            reverse_out="$v $reverse_out"
+        done
+        '$1'=$reverse_out
+    '
+}
+
+# keeps the last occurence of each non-unique item
+unique(){
+    unique_out=
+    eval unique_in=\$$1
+    reverse unique_in
+    for v in $unique_in; do
+        # " $unique_out" +space such that every item is surrounded with spaces
+        case " $unique_out" in *" $v "*) continue; esac  # already in list
+        unique_out="$unique_out$v "
+    done
+    reverse unique_out
+    eval $1=\$unique_out
+}
+
+resolve(){
+    resolve_out=
+    eval resolve_in=\$$1
+    for v in $resolve_in; do
+        eval 'resolve_out="$resolve_out$'$v' "'
+    done
+    eval $1=\$resolve_out
+}
+
+add_cppflags(){
+    append CPPFLAGS "$@"
+}
+
+add_cflags(){
+    append CFLAGS $($cflags_filter "$@")
+}
+
+add_cflags_headers(){
+    append CFLAGS_HEADERS $($cflags_filter "$@")
+}
+
+add_cxxflags(){
+    append CXXFLAGS $($cflags_filter "$@")
+}
+
+add_objcflags(){
+    append OBJCFLAGS $($objcflags_filter "$@")
+}
+
+add_asflags(){
+    append ASFLAGS $($asflags_filter "$@")
+}
+
+add_ldflags(){
+    append LDFLAGS $($ldflags_filter "$@")
+}
+
+add_ldexeflags(){
+    append LDEXEFLAGS $($ldflags_filter "$@")
+}
+
+add_ldsoflags(){
+    append LDSOFLAGS $($ldflags_filter "$@")
+}
+
+add_extralibs(){
+    prepend extralibs $($ldflags_filter "$@")
+}
+
+add_stripflags(){
+    append ASMSTRIPFLAGS "$@"
+}
+
+add_host_cppflags(){
+    append host_cppflags "$@"
+}
+
+add_host_cflags(){
+    append host_cflags $($host_cflags_filter "$@")
+}
+
+add_host_ldflags(){
+    append host_ldflags $($host_ldflags_filter "$@")
+}
+
+add_compat(){
+    append compat_objs $1
+    shift
+    map 'add_cppflags -D$v' "$@"
+}
+
+test_cmd(){
+    log "$@"
+    "$@" >> $logfile 2>&1
+}
+
+test_stat(){
+    log test_stat "$@"
+    stat "$1" >> $logfile 2>&1
+}
+
+cc_e(){
+    eval printf '%s\\n' $CC_E
+}
+
+cc_o(){
+    eval printf '%s\\n' $CC_O
+}
+
+as_o(){
+    eval printf '%s\\n' $AS_O
+}
+
+x86asm_o(){
+    eval printf '%s\\n' $X86ASM_O
+}
+
+ld_o(){
+    eval printf '%s\\n' $LD_O
+}
+
+hostcc_e(){
+    eval printf '%s\\n' $HOSTCC_E
+}
+
+hostcc_o(){
+    eval printf '%s\\n' $HOSTCC_O
+}
+
+nvcc_o(){
+    eval printf '%s\\n' $NVCC_O
+}
+
+test_cc(){
+    log test_cc "$@"
+    cat > $TMPC
+    log_file $TMPC
+    test_cmd $cc $CPPFLAGS $CFLAGS "$@" $CC_C $(cc_o $TMPO) $TMPC
+}
+
+test_cxx(){
+    log test_cxx "$@"
+    cat > $TMPCPP
+    log_file $TMPCPP
+    test_cmd $cxx $CPPFLAGS $CFLAGS $CXXFLAGS "$@" $CXX_C -o $TMPO $TMPCPP
+}
+
+test_objcc(){
+    log test_objcc "$@"
+    cat > $TMPM
+    log_file $TMPM
+    test_cmd $objcc -Werror=missing-prototypes $CPPFLAGS $CFLAGS $OBJCFLAGS "$@" $OBJCC_C $(cc_o $TMPO) $TMPM
+}
+
+test_nvcc(){
+    log test_nvcc "$@"
+    cat > $TMPCU
+    log_file $TMPCU
+    tmpcu_=$TMPCU
+    tmpo_=$TMPO
+    [ -x "$(command -v cygpath)" ] && tmpcu_=$(cygpath -m $tmpcu_) && tmpo_=$(cygpath -m $tmpo_)
+    test_cmd $nvcc $nvccflags "$@" $NVCC_C $(nvcc_o $tmpo_) $tmpcu_
+}
+
+check_nvcc() {
+    log check_nvcc "$@"
+    name=$1
+    shift 1
+    disabled $name && return
+    disable $name
+    test_nvcc "$@" <<EOF && enable $name
+extern "C" {
+    __global__ void hello(unsigned char *data) {}
+}
+EOF
+}
+
+test_cpp(){
+    log test_cpp "$@"
+    cat > $TMPC
+    log_file $TMPC
+    test_cmd $cc $CPPFLAGS $CFLAGS "$@" $(cc_e $TMPO) $TMPC
+}
+
+test_as(){
+    log test_as "$@"
+    cat > $TMPS
+    log_file $TMPS
+    test_cmd $as $CPPFLAGS $ASFLAGS "$@" $AS_C $(as_o $TMPO) $TMPS
+}
+
+test_x86asm(){
+    log test_x86asm "$@"
+    echo "$1" > $TMPASM
+    log_file $TMPASM
+    shift
+    test_cmd $x86asmexe $X86ASMFLAGS -Werror "$@" $(x86asm_o $TMPO) $TMPASM
+}
+
+check_cmd(){
+    log check_cmd "$@"
+    cmd=$1
+    disabled $cmd && return
+    disable $cmd
+    test_cmd $@ && enable $cmd
+}
+
+check_as(){
+    log check_as "$@"
+    name=$1
+    code=$2
+    shift 2
+    disable $name
+    test_as $@ <<EOF && enable $name
+$code
+EOF
+}
+
+check_inline_asm(){
+    log check_inline_asm "$@"
+    name="$1"
+    code="$2"
+    shift 2
+    disable $name
+    test_cc "$@" <<EOF && enable $name
+void foo(void){ __asm__ volatile($code); }
+EOF
+}
+
+check_inline_asm_flags(){
+    log check_inline_asm_flags "$@"
+    name="$1"
+    code="$2"
+    flags=''
+    shift 2
+    while [ "$1" != "" ]; do
+      append flags $1
+      shift
+    done;
+    disable $name
+    cat > $TMPC <<EOF
+void foo(void){ __asm__ volatile($code); }
+EOF
+    log_file $TMPC
+    test_cmd $cc $CPPFLAGS $CFLAGS $flags "$@" $CC_C $(cc_o $TMPO) $TMPC &&
+    enable $name && add_cflags $flags && add_asflags $flags && add_ldflags $flags
+}
+
+check_insn(){
+    log check_insn "$@"
+    check_inline_asm ${1}_inline "\"$2\""
+    check_as ${1}_external "$2"
+}
+
+check_x86asm(){
+    log check_x86asm "$@"
+    name=$1
+    shift
+    disable $name
+    test_x86asm "$@" && enable $name
+}
+
+test_ld(){
+    log test_ld "$@"
+    type=$1
+    shift 1
+    flags=$(filter_out '-l*|*.so' $@)
+    libs=$(filter '-l*|*.so' $@)
+    test_$type $($cflags_filter $flags) || return
+    flags=$($ldflags_filter $flags)
+    libs=$($ldflags_filter $libs)
+    test_cmd $ld $LDFLAGS $LDEXEFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
+}
+
+check_ld(){
+    log check_ld "$@"
+    type=$1
+    name=$2
+    shift 2
+    disable $name
+    test_ld $type $@ && enable $name
+}
+
+print_include(){
+    hdr=$1
+    test "${hdr%.h}" = "${hdr}" &&
+        echo "#include $hdr"    ||
+        echo "#include <$hdr>"
+}
+
+test_code(){
+    log test_code "$@"
+    check=$1
+    headers=$2
+    code=$3
+    shift 3
+    {
+        for hdr in $headers; do
+            print_include $hdr
+        done
+        echo "int main(void) { $code; return 0; }"
+    } | test_$check "$@"
+}
+
+check_cppflags(){
+    log check_cppflags "$@"
+    test_cpp "$@" <<EOF && append CPPFLAGS "$@"
+#include <stdlib.h>
+EOF
+}
+
+test_cflags(){
+    log test_cflags "$@"
+    set -- $($cflags_filter "$@")
+    test_cc "$@" <<EOF
+int x;
+EOF
+}
+
+check_cflags(){
+    log check_cflags "$@"
+    test_cflags "$@" && add_cflags "$@"
+}
+
+check_cxxflags(){
+    log check_cxxflags "$@"
+    set -- $($cflags_filter "$@")
+    test_cxx "$@" <<EOF && append CXXFLAGS "$@"
+int x;
+EOF
+}
+
+test_objcflags(){
+    log test_objcflags "$@"
+    set -- $($objcflags_filter "$@")
+    test_objcc "$@" <<EOF
+int x;
+EOF
+}
+
+check_objcflags(){
+    log check_objcflags "$@"
+    test_objcflags "$@" && add_objcflags "$@"
+}
+
+test_ldflags(){
+    log test_ldflags "$@"
+    set -- $($ldflags_filter "$@")
+    test_ld "cc" "$@" <<EOF
+int main(void){ return 0; }
+EOF
+}
+
+check_ldflags(){
+    log check_ldflags "$@"
+    test_ldflags "$@" && add_ldflags "$@"
+}
+
+test_stripflags(){
+    log test_stripflags "$@"
+    # call test_cc to get a fresh TMPO
+    test_cc <<EOF
+int main(void) { return 0; }
+EOF
+    test_cmd $strip $ASMSTRIPFLAGS "$@" $TMPO
+}
+
+check_stripflags(){
+    log check_stripflags "$@"
+    test_stripflags "$@" && add_stripflags "$@"
+}
+
+check_headers(){
+    log check_headers "$@"
+    headers=$1
+    shift
+    disable_sanitized $headers
+    {
+        for hdr in $headers; do
+            print_include $hdr
+        done
+        echo "int x;"
+    } | test_cpp "$@" && enable_sanitized $headers
+}
+
+check_header_objcc(){
+    log check_header_objcc "$@"
+    rm -f -- "$TMPO"
+    header=$1
+    shift
+    disable_sanitized $header
+    {
+       echo "#include <$header>"
+       echo "int main(void) { return 0; }"
+    } | test_objcc && test_stat "$TMPO" && enable_sanitized $header
+}
+
+check_apple_framework(){
+    log check_apple_framework "$@"
+    framework="$1"
+    name="$(tolower $framework)"
+    header="${framework}/${framework}.h"
+    disable $name
+    check_header_objcc $header &&
+        enable $name && eval ${name}_extralibs='"-framework $framework"'
+}
+
+check_func(){
+    log check_func "$@"
+    func=$1
+    shift
+    disable $func
+    test_ld "cc" "$@" <<EOF && enable $func
+extern int $func();
+int main(void){ $func(); }
+EOF
+}
+
+check_mathfunc(){
+    log check_mathfunc "$@"
+    func=$1
+    narg=$2
+    shift 2
+    test $narg = 2 && args="f, g" || args="f"
+    disable $func
+    test_ld "cc" "$@" <<EOF && enable $func
+#include <math.h>
+float foo(float f, float g) { return $func($args); }
+int main(void){ return (int) foo; }
+EOF
+}
+
+check_func_headers(){
+    log check_func_headers "$@"
+    headers=$1
+    funcs=$2
+    shift 2
+    {
+        for hdr in $headers; do
+            print_include $hdr
+        done
+        echo "#include <stdint.h>"
+        for func in $funcs; do
+            echo "long check_$func(void) { return (long) $func; }"
+        done
+        echo "int main(void) { int ret = 0;"
+        # LTO could optimize out the test functions without this
+        for func in $funcs; do
+            echo " ret |= ((intptr_t)check_$func) & 0xFFFF;"
+        done
+        echo "return ret; }"
+    } | test_ld "cc" "$@" && enable $funcs && enable_sanitized $headers
+}
+
+check_class_headers_cpp(){
+    log check_class_headers_cpp "$@"
+    headers=$1
+    classes=$2
+    shift 2
+    {
+        for hdr in $headers; do
+            echo "#include <$hdr>"
+        done
+        echo "int main(void) { "
+        i=1
+        for class in $classes; do
+            echo "$class obj$i;"
+            i=$(expr $i + 1)
+        done
+        echo "return 0; }"
+    } | test_ld "cxx" "$@" && enable $funcs && enable_sanitized $headers
+}
+
+test_cpp_condition(){
+    log test_cpp_condition "$@"
+    header=$1
+    condition=$2
+    shift 2
+    test_cpp "$@" <<EOF
+#include <$header>
+#if !($condition)
+#error "unsatisfied condition: $condition"
+#endif
+EOF
+}
+
+check_cpp_condition(){
+    log check_cpp_condition "$@"
+    name=$1
+    shift 1
+    disable $name
+    test_cpp_condition "$@" && enable $name
+}
+
+test_cflags_cc(){
+    log test_cflags_cc "$@"
+    flags=$1
+    header=$2
+    condition=$3
+    shift 3
+    set -- $($cflags_filter "$flags")
+    test_cc "$@" <<EOF
+#include <$header>
+#if !($condition)
+#error "unsatisfied condition: $condition"
+#endif
+EOF
+}
+
+check_lib(){
+    log check_lib "$@"
+    name="$1"
+    headers="$2"
+    funcs="$3"
+    shift 3
+    disable $name
+    check_func_headers "$headers" "$funcs" "$@" &&
+        enable $name && eval ${name}_extralibs="\$@"
+}
+
+check_lib_cpp(){
+    log check_lib_cpp "$@"
+    name="$1"
+    headers="$2"
+    classes="$3"
+    shift 3
+    disable $name
+    check_class_headers_cpp "$headers" "$classes" "$@" &&
+        enable $name && eval ${name}_extralibs="\$@"
+}
+
+test_pkg_config(){
+    log test_pkg_config "$@"
+    name="$1"
+    pkg_version="$2"
+    pkg="${2%% *}"
+    headers="$3"
+    funcs="$4"
+    shift 4
+    disable $name
+    test_cmd $pkg_config --exists --print-errors $pkg_version || return
+    pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
+    pkg_libs=$($pkg_config --libs $pkg_config_flags $pkg)
+    pkg_incdir=$($pkg_config --variable=includedir $pkg_config_flags $pkg)
+    check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
+        enable $name &&
+        set_sanitized "${name}_cflags"    $pkg_cflags &&
+        set_sanitized "${name}_incdir"    $pkg_incdir &&
+        set_sanitized "${name}_extralibs" $pkg_libs
+}
+
+test_pkg_config_cpp(){
+    log test_pkg_config_cpp "$@"
+    name="$1"
+    pkg_version="$2"
+    pkg="${2%% *}"
+    headers="$3"
+    cond="$4"
+    shift 4
+    disable $name
+    test_cmd $pkg_config --exists --print-errors $pkg_version || return
+    pkg_cflags=$($pkg_config --cflags $pkg_config_flags $pkg)
+    pkg_incdir=$($pkg_config --variable=includedir $pkg_config_flags $pkg)
+    pkg_incflags=$($pkg_config --cflags-only-I $pkg_config_flags $pkg)
+    test_cpp_condition "$pkg_incdir/$headers" "$cond" "$@" &&
+        enable $name &&
+        set_sanitized "${name}_cflags" $pkg_cflags &&
+        set_sanitized "${name}_incdir" $pkg_incdir &&
+        set_sanitized "${name}_incflags" $pkg_incflags
+}
+
+check_pkg_config(){
+    log check_pkg_config "$@"
+    name="$1"
+    test_pkg_config "$@" &&
+        eval add_cflags \$${name}_cflags
+}
+
+check_pkg_config_cpp(){
+    log check_pkg_config_cpp "$@"
+    name="$1"
+    test_pkg_config_cpp "$@" &&
+        eval add_cflags \$${name}_cflags
+}
+
+check_pkg_config_header_only(){
+    log check_pkg_config_cpp "$@"
+    name="$1"
+    test_pkg_config_cpp "$@" &&
+        eval add_cflags \$${name}_incflags
+}
+
+test_exec(){
+    test_ld "cc" "$@" && { enabled cross_compile || $TMPE >> $logfile 2>&1; }
+}
+
+check_exec_crash(){
+    log check_exec_crash "$@"
+    code=$(cat)
+
+    # exit() is not async signal safe.  _Exit (C99) and _exit (POSIX)
+    # are safe but may not be available everywhere.  Thus we use
+    # raise(SIGTERM) instead.  The check is run in a subshell so we
+    # can redirect the "Terminated" message from the shell.  SIGBUS
+    # is not defined by standard C so it is used conditionally.
+
+    (test_exec "$@") >> $logfile 2>&1 <<EOF
+#include <signal.h>
+static void sighandler(int sig){
+    raise(SIGTERM);
+}
+int foo(void){
+    $code
+}
+int (*func_ptr)(void) = foo;
+int main(void){
+    signal(SIGILL, sighandler);
+    signal(SIGFPE, sighandler);
+    signal(SIGSEGV, sighandler);
+#ifdef SIGBUS
+    signal(SIGBUS, sighandler);
+#endif
+    return func_ptr();
+}
+EOF
+}
+
+check_type(){
+    log check_type "$@"
+    headers=$1
+    type=$2
+    shift 2
+    disable_sanitized "$type"
+    test_code cc "$headers" "$type v" "$@" && enable_sanitized "$type"
+}
+
+check_struct(){
+    log check_struct "$@"
+    headers=$1
+    struct=$2
+    member=$3
+    shift 3
+    disable_sanitized "${struct}_${member}"
+    test_code cc "$headers" "const void *p = &(($struct *)0)->$member" "$@" &&
+        enable_sanitized "${struct}_${member}"
+}
+
+check_builtin(){
+    log check_builtin "$@"
+    name=$1
+    headers=$2
+    builtin=$3
+    shift 3
+    disable "$name"
+    test_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
+}
+
+check_compile_assert(){
+    log check_compile_assert "$@"
+    name=$1
+    headers=$2
+    condition=$3
+    shift 3
+    disable "$name"
+    test_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
+}
+
+check_cc(){
+    log check_cc "$@"
+    name=$1
+    shift
+    disable "$name"
+    test_code cc "$@" && enable "$name"
+}
+
+require(){
+    log require "$@"
+    name_version="$1"
+    name="${1%% *}"
+    shift
+    check_lib $name "$@" || die "ERROR: $name_version not found"
+}
+
+require_cc(){
+    log require_cc "$@"
+    name="$1"
+    check_cc "$@" || die "ERROR: $name failed"
+}
+
+require_cpp(){
+    log require_cpp "$@"
+    name_version="$1"
+    name="${1%% *}"
+    shift
+    check_lib_cpp "$name" "$@" || die "ERROR: $name_version not found"
+}
+
+require_headers(){
+    log require_headers "$@"
+    headers="$1"
+    check_headers "$@" || die "ERROR: $headers not found"
+}
+
+require_cpp_condition(){
+    log require_cpp_condition "$@"
+    condition="$3"
+    check_cpp_condition "$@" || die "ERROR: $condition not satisfied"
+}
+
+require_pkg_config(){
+    log require_pkg_config "$@"
+    pkg_version="$2"
+    check_pkg_config "$@" || die "ERROR: $pkg_version not found using pkg-config$pkg_config_fail_message"
+}
+
+require_pkg_config_cpp(){
+    log require_pkg_config_cpp "$@"
+    pkg_version="$2"
+    check_pkg_config_cpp "$@" || die "ERROR: $pkg_version not found using pkg-config$pkg_config_fail_message"
+}
+
+test_host_cc(){
+    log test_host_cc "$@"
+    cat > $TMPC
+    log_file $TMPC
+    test_cmd $host_cc $host_cflags "$@" $HOSTCC_C $(hostcc_o $TMPO) $TMPC
+}
+
+test_host_cpp(){
+    log test_host_cpp "$@"
+    cat > $TMPC
+    log_file $TMPC
+    test_cmd $host_cc $host_cppflags $host_cflags "$@" $(hostcc_e $TMPO) $TMPC
+}
+
+check_host_cppflags(){
+    log check_host_cppflags "$@"
+    test_host_cpp "$@" <<EOF && append host_cppflags "$@"
+#include <stdlib.h>
+EOF
+}
+
+check_host_cflags(){
+    log check_host_cflags "$@"
+    set -- $($host_cflags_filter "$@")
+    test_host_cc "$@" <<EOF && append host_cflags "$@"
+int x;
+EOF
+}
+
+test_host_cpp_condition(){
+    log test_host_cpp_condition "$@"
+    header=$1
+    condition=$2
+    shift 2
+    test_host_cpp "$@" <<EOF
+#include <$header>
+#if !($condition)
+#error "unsatisfied condition: $condition"
+#endif
+EOF
+}
+
+check_host_cpp_condition(){
+    log check_host_cpp_condition "$@"
+    name=$1
+    shift 1
+    disable $name
+    test_host_cpp_condition "$@" && enable $name
+}
+
+cp_if_changed(){
+    cmp -s "$1" "$2" && { test "$quiet" != "yes" && echo "$2 is unchanged"; } && return
+    mkdir -p "$(dirname $2)"
+    cp -f "$1" "$2"
+}
+
+# CONFIG_LIST contains configurable options, while HAVE_LIST is for
+# system-dependent things.
+
+AVCODEC_COMPONENTS="
+    bsfs
+    decoders
+    encoders
+    hwaccels
+    parsers
+"
+
+AVDEVICE_COMPONENTS="
+    indevs
+    outdevs
+"
+
+AVFILTER_COMPONENTS="
+    filters
+"
+
+AVFORMAT_COMPONENTS="
+    demuxers
+    muxers
+    protocols
+"
+
+COMPONENT_LIST="
+    $AVCODEC_COMPONENTS
+    $AVDEVICE_COMPONENTS
+    $AVFILTER_COMPONENTS
+    $AVFORMAT_COMPONENTS
+"
+
+EXAMPLE_LIST="
+    avio_http_serve_files_example
+    avio_list_dir_example
+    avio_read_callback_example
+    decode_audio_example
+    decode_filter_audio_example
+    decode_filter_video_example
+    decode_video_example
+    demux_decode_example
+    encode_audio_example
+    encode_video_example
+    extract_mvs_example
+    filter_audio_example
+    hw_decode_example
+    mux_example
+    qsv_decode_example
+    remux_example
+    resample_audio_example
+    scale_video_example
+    show_metadata_example
+    transcode_aac_example
+    transcode_example
+    vaapi_encode_example
+    vaapi_transcode_example
+    qsv_transcode_example
+"
+
+EXTERNAL_AUTODETECT_LIBRARY_LIST="
+    alsa
+    appkit
+    avfoundation
+    bzlib
+    coreimage
+    iconv
+    libxcb
+    libxcb_shm
+    libxcb_shape
+    libxcb_xfixes
+    lzma
+    mediafoundation
+    metal
+    schannel
+    sdl2
+    securetransport
+    sndio
+    xlib
+    zlib
+"
+
+EXTERNAL_LIBRARY_GPL_LIST="
+    avisynth
+    frei0r
+    libcdio
+    libdavs2
+    librubberband
+    libvidstab
+    libx264
+    libx265
+    libxavs
+    libxavs2
+    libxvid
+"
+
+EXTERNAL_LIBRARY_NONFREE_LIST="
+    decklink
+    libfdk_aac
+    libtls
+"
+
+EXTERNAL_LIBRARY_VERSION3_LIST="
+    gmp
+    libaribb24
+    liblensfun
+    libopencore_amrnb
+    libopencore_amrwb
+    libvo_amrwbenc
+    mbedtls
+    rkmpp
+"
+
+EXTERNAL_LIBRARY_GPLV3_LIST="
+    libsmbclient
+"
+
+EXTERNAL_LIBRARY_LIST="
+    $EXTERNAL_LIBRARY_GPL_LIST
+    $EXTERNAL_LIBRARY_NONFREE_LIST
+    $EXTERNAL_LIBRARY_VERSION3_LIST
+    $EXTERNAL_LIBRARY_GPLV3_LIST
+    chromaprint
+    gcrypt
+    gnutls
+    jni
+    ladspa
+    lcms2
+    libaom
+    libass
+    libbluray
+    libbs2b
+    libcaca
+    libcelt
+    libcodec2
+    libdav1d
+    libdc1394
+    libdrm
+    libflite
+    libfontconfig
+    libfreetype
+    libfribidi
+    libglslang
+    libgme
+    libgsm
+    libiec61883
+    libilbc
+    libjack
+    libjxl
+    libklvanc
+    libkvazaar
+    libmodplug
+    libmp3lame
+    libmysofa
+    libopencv
+    libopenh264
+    libopenjpeg
+    libopenmpt
+    libopenvino
+    libopus
+    libplacebo
+    libpulse
+    librabbitmq
+    librav1e
+    librist
+    librsvg
+    librtmp
+    libshaderc
+    libshine
+    libsmbclient
+    libsnappy
+    libsoxr
+    libspeex
+    libsrt
+    libssh
+    libsvtav1
+    libtensorflow
+    libtesseract
+    libtheora
+    libtwolame
+    libuavs3d
+    libv4l2
+    libvmaf
+    libvorbis
+    libvpx
+    libwebp
+    libxml2
+    libzimg
+    libzmq
+    libzvbi
+    lv2
+    mediacodec
+    openal
+    opengl
+    openssl
+    pocketsphinx
+    vapoursynth
+"
+
+HWACCEL_AUTODETECT_LIBRARY_LIST="
+    amf
+    audiotoolbox
+    crystalhd
+    cuda
+    cuda_llvm
+    cuvid
+    d3d11va
+    dxva2
+    ffnvcodec
+    nvdec
+    nvenc
+    vaapi
+    vdpau
+    videotoolbox
+    vulkan
+    v4l2_m2m
+"
+
+# catchall list of things that require external libs to link
+EXTRALIBS_LIST="
+    cpu_init
+    cws2fws
+"
+
+HWACCEL_LIBRARY_NONFREE_LIST="
+    cuda_nvcc
+    cuda_sdk
+    libnpp
+"
+
+HWACCEL_LIBRARY_LIST="
+    $HWACCEL_LIBRARY_NONFREE_LIST
+    libmfx
+    libvpl
+    mmal
+    omx
+    opencl
+"
+
+DOCUMENT_LIST="
+    doc
+    htmlpages
+    manpages
+    podpages
+    txtpages
+"
+
+FEATURE_LIST="
+    ftrapv
+    gray
+    hardcoded_tables
+    omx_rpi
+    runtime_cpudetect
+    safe_bitstream_reader
+    shared
+    small
+    static
+    swscale_alpha
+"
+
+# this list should be kept in linking order
+LIBRARY_LIST="
+    avdevice
+    avfilter
+    swscale
+    postproc
+    avformat
+    avcodec
+    swresample
+    avutil
+"
+
+LICENSE_LIST="
+    gpl
+    nonfree
+    version3
+"
+
+PROGRAM_LIST="
+    ffplay
+    ffprobe
+    ffmpeg
+"
+
+SUBSYSTEM_LIST="
+    dct
+    dwt
+    error_resilience
+    faan
+    fast_unaligned
+    fft
+    lsp
+    mdct
+    pixelutils
+    network
+    rdft
+"
+
+# COMPONENT_LIST needs to come last to ensure correct dependency checking
+CONFIG_LIST="
+    $DOCUMENT_LIST
+    $EXAMPLE_LIST
+    $EXTERNAL_LIBRARY_LIST
+    $EXTERNAL_AUTODETECT_LIBRARY_LIST
+    $HWACCEL_LIBRARY_LIST
+    $HWACCEL_AUTODETECT_LIBRARY_LIST
+    $FEATURE_LIST
+    $LICENSE_LIST
+    $LIBRARY_LIST
+    $PROGRAM_LIST
+    $SUBSYSTEM_LIST
+    autodetect
+    fontconfig
+    large_tests
+    linux_perf
+    macos_kperf
+    memory_poisoning
+    neon_clobber_test
+    ossfuzz
+    pic
+    ptx_compression
+    thumb
+    valgrind_backtrace
+    xmm_clobber_test
+    $COMPONENT_LIST
+"
+
+THREADS_LIST="
+    pthreads
+    os2threads
+    w32threads
+"
+
+ATOMICS_LIST="
+    atomics_gcc
+    atomics_suncc
+    atomics_win32
+"
+
+AUTODETECT_LIBS="
+    $EXTERNAL_AUTODETECT_LIBRARY_LIST
+    $HWACCEL_AUTODETECT_LIBRARY_LIST
+    $THREADS_LIST
+"
+
+ARCH_LIST="
+    aarch64
+    alpha
+    arm
+    avr32
+    avr32_ap
+    avr32_uc
+    bfin
+    ia64
+    loongarch
+    loongarch32
+    loongarch64
+    m68k
+    mips
+    mips64
+    parisc
+    ppc
+    ppc64
+    riscv
+    s390
+    sh4
+    sparc
+    sparc64
+    tilegx
+    tilepro
+    tomi
+    x86
+    x86_32
+    x86_64
+"
+
+ARCH_EXT_LIST_ARM="
+    armv5te
+    armv6
+    armv6t2
+    armv8
+    neon
+    vfp
+    vfpv3
+    setend
+"
+
+ARCH_EXT_LIST_MIPS="
+    mipsfpu
+    mips32r2
+    mips32r5
+    mips64r2
+    mips32r6
+    mips64r6
+    mipsdsp
+    mipsdspr2
+    msa
+"
+
+ARCH_EXT_LIST_LOONGSON="
+    loongson2
+    loongson3
+    mmi
+    lsx
+    lasx
+"
+
+ARCH_EXT_LIST_X86_SIMD="
+    aesni
+    amd3dnow
+    amd3dnowext
+    avx
+    avx2
+    avx512
+    avx512icl
+    fma3
+    fma4
+    mmx
+    mmxext
+    sse
+    sse2
+    sse3
+    sse4
+    sse42
+    ssse3
+    xop
+"
+
+ARCH_EXT_LIST_PPC="
+    altivec
+    dcbzl
+    ldbrx
+    power8
+    ppc4xx
+    vsx
+"
+
+ARCH_EXT_LIST_RISCV="
+    rvv
+"
+
+ARCH_EXT_LIST_X86="
+    $ARCH_EXT_LIST_X86_SIMD
+    cpunop
+    i686
+"
+
+ARCH_EXT_LIST="
+    $ARCH_EXT_LIST_ARM
+    $ARCH_EXT_LIST_PPC
+    $ARCH_EXT_LIST_RISCV
+    $ARCH_EXT_LIST_X86
+    $ARCH_EXT_LIST_MIPS
+    $ARCH_EXT_LIST_LOONGSON
+"
+
+ARCH_FEATURES="
+    aligned_stack
+    fast_64bit
+    fast_clz
+    fast_cmov
+    fast_float16
+    local_aligned
+    simd_align_16
+    simd_align_32
+    simd_align_64
+"
+
+BUILTIN_LIST="
+    atomic_cas_ptr
+    machine_rw_barrier
+    MemoryBarrier
+    mm_empty
+    rdtsc
+    sem_timedwait
+    sync_val_compare_and_swap
+"
+HAVE_LIST_CMDLINE="
+    inline_asm
+    symver
+    x86asm
+"
+
+HAVE_LIST_PUB="
+    bigendian
+    fast_unaligned
+"
+
+HEADERS_LIST="
+    arpa_inet_h
+    asm_types_h
+    cdio_paranoia_h
+    cdio_paranoia_paranoia_h
+    cuda_h
+    dispatch_dispatch_h
+    dev_bktr_ioctl_bt848_h
+    dev_bktr_ioctl_meteor_h
+    dev_ic_bt8xx_h
+    dev_video_bktr_ioctl_bt848_h
+    dev_video_meteor_ioctl_meteor_h
+    direct_h
+    dirent_h
+    dxgidebug_h
+    dxva_h
+    ES2_gl_h
+    gsm_h
+    io_h
+    linux_dma_buf_h
+    linux_perf_event_h
+    machine_ioctl_bt848_h
+    machine_ioctl_meteor_h
+    malloc_h
+    opencv2_core_core_c_h
+    OpenGL_gl3_h
+    poll_h
+    sys_param_h
+    sys_resource_h
+    sys_select_h
+    sys_soundcard_h
+    sys_time_h
+    sys_un_h
+    sys_videoio_h
+    termios_h
+    udplite_h
+    unistd_h
+    valgrind_valgrind_h
+    windows_h
+    winsock2_h
+"
+
+INTRINSICS_LIST="
+    intrinsics_neon
+"
+
+MATH_FUNCS="
+    atanf
+    atan2f
+    cbrt
+    cbrtf
+    copysign
+    cosf
+    erf
+    exp2
+    exp2f
+    expf
+    hypot
+    isfinite
+    isinf
+    isnan
+    ldexpf
+    llrint
+    llrintf
+    log2
+    log2f
+    log10f
+    lrint
+    lrintf
+    powf
+    rint
+    round
+    roundf
+    sinf
+    trunc
+    truncf
+"
+
+SYSTEM_FEATURES="
+    dos_paths
+    libc_msvcrt
+    MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS
+    section_data_rel_ro
+    threads
+    uwp
+    winrt
+"
+
+SYSTEM_FUNCS="
+    access
+    aligned_malloc
+    arc4random
+    clock_gettime
+    closesocket
+    CommandLineToArgvW
+    fcntl
+    getaddrinfo
+    getauxval
+    getenv
+    gethrtime
+    getopt
+    GetModuleHandle
+    GetProcessAffinityMask
+    GetProcessMemoryInfo
+    GetProcessTimes
+    getrusage
+    GetStdHandle
+    GetSystemTimeAsFileTime
+    gettimeofday
+    glob
+    glXGetProcAddress
+    gmtime_r
+    inet_aton
+    isatty
+    kbhit
+    localtime_r
+    lstat
+    lzo1x_999_compress
+    mach_absolute_time
+    MapViewOfFile
+    memalign
+    mkstemp
+    mmap
+    mprotect
+    nanosleep
+    PeekNamedPipe
+    posix_memalign
+    prctl
+    pthread_cancel
+    sched_getaffinity
+    SecItemImport
+    SetConsoleTextAttribute
+    SetConsoleCtrlHandler
+    SetDllDirectory
+    setmode
+    setrlimit
+    Sleep
+    strerror_r
+    sysconf
+    sysctl
+    usleep
+    UTGetOSTypeFromString
+    VirtualAlloc
+    wglGetProcAddress
+"
+
+SYSTEM_LIBRARIES="
+    bcrypt
+    vaapi_drm
+    vaapi_x11
+    vdpau_x11
+"
+
+TOOLCHAIN_FEATURES="
+    as_arch_directive
+    as_dn_directive
+    as_fpu_directive
+    as_func
+    as_object_arch
+    asm_mod_q
+    blocks_extension
+    ebp_available
+    ebx_available
+    gnu_as
+    gnu_windres
+    ibm_asm
+    inline_asm_direct_symbol_refs
+    inline_asm_labels
+    inline_asm_nonlocal_labels
+    pragma_deprecated
+    rsync_contimeout
+    symver_asm_label
+    symver_gnu_asm
+    vfp_args
+    xform_asm
+    xmm_clobbers
+"
+
+TYPES_LIST="
+    DPI_AWARENESS_CONTEXT
+    IDXGIOutput5
+    kCMVideoCodecType_HEVC
+    kCMVideoCodecType_HEVCWithAlpha
+    kCMVideoCodecType_VP9
+    kCVPixelFormatType_420YpCbCr10BiPlanarVideoRange
+    kCVPixelFormatType_422YpCbCr8BiPlanarVideoRange
+    kCVPixelFormatType_422YpCbCr10BiPlanarVideoRange
+    kCVPixelFormatType_422YpCbCr16BiPlanarVideoRange
+    kCVPixelFormatType_444YpCbCr8BiPlanarVideoRange
+    kCVPixelFormatType_444YpCbCr10BiPlanarVideoRange
+    kCVPixelFormatType_444YpCbCr16BiPlanarVideoRange
+    kCVImageBufferTransferFunction_SMPTE_ST_2084_PQ
+    kCVImageBufferTransferFunction_ITU_R_2100_HLG
+    kCVImageBufferTransferFunction_Linear
+    kCVImageBufferYCbCrMatrix_ITU_R_2020
+    kCVImageBufferColorPrimaries_ITU_R_2020
+    kCVImageBufferTransferFunction_ITU_R_2020
+    kCVImageBufferTransferFunction_SMPTE_ST_428_1
+    socklen_t
+    struct_addrinfo
+    struct_group_source_req
+    struct_ip_mreq_source
+    struct_ipv6_mreq
+    struct_msghdr_msg_flags
+    struct_pollfd
+    struct_rusage_ru_maxrss
+    struct_sctp_event_subscribe
+    struct_sockaddr_in6
+    struct_sockaddr_sa_len
+    struct_sockaddr_storage
+    struct_stat_st_mtim_tv_nsec
+    struct_v4l2_frmivalenum_discrete
+"
+
+HAVE_LIST="
+    $ARCH_EXT_LIST
+    $(add_suffix _external $ARCH_EXT_LIST)
+    $(add_suffix _inline   $ARCH_EXT_LIST)
+    $ARCH_FEATURES
+    $BUILTIN_LIST
+    $HAVE_LIST_CMDLINE
+    $HAVE_LIST_PUB
+    $HEADERS_LIST
+    $INTRINSICS_LIST
+    $MATH_FUNCS
+    $SYSTEM_FEATURES
+    $SYSTEM_FUNCS
+    $SYSTEM_LIBRARIES
+    $THREADS_LIST
+    $TOOLCHAIN_FEATURES
+    $TYPES_LIST
+    gzip
+    libdrm_getfb2
+    makeinfo
+    makeinfo_html
+    opencl_d3d11
+    opencl_drm_arm
+    opencl_drm_beignet
+    opencl_dxva2
+    opencl_vaapi_beignet
+    opencl_vaapi_intel_media
+    perl
+    pod2man
+    texi2html
+    xmllint
+    zlib_gzip
+"
+
+# options emitted with CONFIG_ prefix but not available on the command line
+CONFIG_EXTRA="
+    aandcttables
+    ac3dsp
+    adts_header
+    atsc_a53
+    audio_frame_queue
+    audiodsp
+    blockdsp
+    bswapdsp
+    cabac
+    cbs
+    cbs_av1
+    cbs_h264
+    cbs_h265
+    cbs_jpeg
+    cbs_mpeg2
+    cbs_vp9
+    deflate_wrapper
+    dirac_parse
+    dnn
+    dovi_rpu
+    dvprofile
+    exif
+    faandct
+    faanidct
+    fdctdsp
+    fmtconvert
+    frame_thread_encoder
+    g722dsp
+    golomb
+    gplv3
+    h263dsp
+    h264chroma
+    h264dsp
+    h264parse
+    h264pred
+    h264qpel
+    h264_sei
+    hevcparse
+    hevc_sei
+    hpeldsp
+    huffman
+    huffyuvdsp
+    huffyuvencdsp
+    idctdsp
+    iirfilter
+    inflate_wrapper
+    intrax8
+    iso_media
+    ividsp
+    jpegtables
+    lgplv3
+    libx262
+    llauddsp
+    llviddsp
+    llvidencdsp
+    lpc
+    lzf
+    me_cmp
+    mpeg_er
+    mpegaudio
+    mpegaudiodsp
+    mpegaudioheader
+    mpeg4audio
+    mpegvideo
+    mpegvideodec
+    mpegvideoenc
+    msmpeg4dec
+    msmpeg4enc
+    mss34dsp
+    pixblockdsp
+    qpeldsp
+    qsv
+    qsvdec
+    qsvenc
+    qsvvpp
+    rangecoder
+    riffdec
+    riffenc
+    rtpdec
+    rtpenc_chain
+    rv34dsp
+    scene_sad
+    sinewin
+    snappy
+    srtp
+    startcode
+    texturedsp
+    texturedspenc
+    tpeldsp
+    vaapi_1
+    vaapi_encode
+    vc1dsp
+    videodsp
+    vp3dsp
+    vp56dsp
+    vp8dsp
+    wma_freqs
+    wmv2dsp
+"
+
+CMDLINE_SELECT="
+    $ARCH_EXT_LIST
+    $CONFIG_LIST
+    $HAVE_LIST_CMDLINE
+    $THREADS_LIST
+    asm
+    cross_compile
+    debug
+    extra_warnings
+    logging
+    lto
+    optimizations
+    rpath
+    stripping
+"
+
+PATHS_LIST="
+    bindir
+    datadir
+    docdir
+    incdir
+    libdir
+    mandir
+    pkgconfigdir
+    prefix
+    shlibdir
+    install_name_dir
+"
+
+CMDLINE_SET="
+    $PATHS_LIST
+    ar
+    arch
+    as
+    assert_level
+    build_suffix
+    cc
+    objcc
+    cpu
+    cross_prefix
+    custom_allocator
+    cxx
+    dep_cc
+    doxygen
+    env
+    extra_version
+    gas
+    host_cc
+    host_cflags
+    host_extralibs
+    host_ld
+    host_ldflags
+    host_os
+    ignore_tests
+    install
+    ld
+    ln_s
+    logfile
+    malloc_prefix
+    metalcc
+    metallib
+    nm
+    optflags
+    nvcc
+    nvccflags
+    pkg_config
+    pkg_config_flags
+    progs_suffix
+    random_seed
+    ranlib
+    samples
+    strip
+    sws_max_filter_size
+    sysinclude
+    sysroot
+    target_exec
+    target_os
+    target_path
+    target_samples
+    tempprefix
+    toolchain
+    valgrind
+    windres
+    x86asmexe
+"
+
+CMDLINE_APPEND="
+    extra_cflags
+    extra_cxxflags
+    extra_objcflags
+    host_cppflags
+"
+
+# code dependency declarations
+
+# architecture extensions
+
+armv5te_deps="arm"
+armv6_deps="arm"
+armv6t2_deps="arm"
+armv8_deps="aarch64"
+neon_deps_any="aarch64 arm"
+intrinsics_neon_deps="neon"
+vfp_deps_any="aarch64 arm"
+vfpv3_deps="vfp"
+setend_deps="arm"
+
+map 'eval ${v}_inline_deps=inline_asm' $ARCH_EXT_LIST_ARM
+
+altivec_deps="ppc"
+dcbzl_deps="ppc"
+ldbrx_deps="ppc"
+ppc4xx_deps="ppc"
+vsx_deps="altivec"
+power8_deps="vsx"
+
+rvv_deps="riscv"
+
+loongson2_deps="mips"
+loongson3_deps="mips"
+mmi_deps_any="loongson2 loongson3"
+lsx_deps="loongarch"
+lasx_deps="lsx"
+
+mips32r2_deps="mips"
+mips32r5_deps="mips"
+mips32r6_deps="mips"
+mips64r2_deps="mips"
+mips64r6_deps="mips"
+mipsfpu_deps="mips"
+mipsdsp_deps="mips"
+mipsdspr2_deps="mips"
+msa_deps="mipsfpu"
+
+cpunop_deps="i686"
+x86_64_select="i686"
+x86_64_suggest="fast_cmov"
+
+amd3dnow_deps="mmx"
+amd3dnowext_deps="amd3dnow"
+i686_deps="x86"
+mmx_deps="x86"
+mmxext_deps="mmx"
+sse_deps="mmxext"
+sse2_deps="sse"
+sse3_deps="sse2"
+ssse3_deps="sse3"
+sse4_deps="ssse3"
+sse42_deps="sse4"
+aesni_deps="sse42"
+avx_deps="sse42"
+xop_deps="avx"
+fma3_deps="avx"
+fma4_deps="avx"
+avx2_deps="avx"
+avx512_deps="avx2"
+avx512icl_deps="avx512"
+
+mmx_external_deps="x86asm"
+mmx_inline_deps="inline_asm x86"
+mmx_suggest="mmx_external mmx_inline"
+
+for ext in $(filter_out mmx $ARCH_EXT_LIST_X86_SIMD); do
+    eval dep=\$${ext}_deps
+    eval ${ext}_external_deps='"${dep}_external"'
+    eval ${ext}_inline_deps='"${dep}_inline"'
+    eval ${ext}_suggest='"${ext}_external ${ext}_inline"'
+done
+
+aligned_stack_if_any="aarch64 ppc x86"
+fast_64bit_if_any="aarch64 alpha ia64 mips64 parisc64 ppc64 riscv64 sparc64 x86_64"
+fast_clz_if_any="aarch64 alpha avr32 mips ppc x86"
+fast_unaligned_if_any="aarch64 ppc x86"
+simd_align_16_if_any="altivec neon sse"
+simd_align_32_if_any="avx"
+simd_align_64_if_any="avx512"
+
+# system capabilities
+linux_perf_deps="linux_perf_event_h"
+symver_if_any="symver_asm_label symver_gnu_asm"
+valgrind_backtrace_conflict="optimizations"
+valgrind_backtrace_deps="valgrind_valgrind_h"
+
+# threading support
+atomics_gcc_if="sync_val_compare_and_swap"
+atomics_suncc_if="atomic_cas_ptr machine_rw_barrier"
+atomics_win32_if="MemoryBarrier"
+atomics_native_if_any="$ATOMICS_LIST"
+w32threads_deps="atomics_native"
+threads_if_any="$THREADS_LIST"
+
+# subsystems
+cbs_av1_select="cbs"
+cbs_h264_select="cbs"
+cbs_h265_select="cbs"
+cbs_jpeg_select="cbs"
+cbs_mpeg2_select="cbs"
+cbs_vp9_select="cbs"
+dct_select="rdft"
+deflate_wrapper_deps="zlib"
+dirac_parse_select="golomb"
+dovi_rpu_select="golomb"
+dnn_suggest="libtensorflow libopenvino"
+dnn_deps="avformat swscale"
+error_resilience_select="me_cmp"
+faandct_deps="faan"
+faandct_select="fdctdsp"
+faanidct_deps="faan"
+faanidct_select="idctdsp"
+h264dsp_select="startcode"
+h264_sei_select="atsc_a53 golomb"
+hevcparse_select="golomb"
+hevc_sei_select="atsc_a53 golomb"
+frame_thread_encoder_deps="encoders threads"
+inflate_wrapper_deps="zlib"
+intrax8_select="blockdsp wmv2dsp"
+iso_media_select="mpeg4audio"
+mdct_select="fft"
+me_cmp_select="idctdsp"
+mpeg_er_select="error_resilience"
+mpegaudio_select="mpegaudiodsp mpegaudioheader"
+mpegaudiodsp_select="dct"
+mpegvideo_select="blockdsp hpeldsp idctdsp videodsp"
+mpegvideodec_select="h264chroma mpegvideo mpeg_er"
+mpegvideoenc_select="aandcttables fdctdsp me_cmp mpegvideo pixblockdsp"
+msmpeg4dec_select="h263_decoder"
+msmpeg4enc_select="h263_encoder"
+vc1dsp_select="h264chroma qpeldsp startcode"
+rdft_select="fft"
+
+# decoders / encoders
+aac_decoder_select="adts_header mpeg4audio sinewin"
+aac_fixed_decoder_select="adts_header mpeg4audio"
+aac_encoder_select="audio_frame_queue iirfilter lpc sinewin"
+aac_latm_decoder_select="aac_decoder aac_latm_parser"
+ac3_decoder_select="ac3_parser ac3dsp bswapdsp fmtconvert"
+ac3_fixed_decoder_select="ac3_parser ac3dsp bswapdsp"
+ac3_encoder_select="ac3dsp audiodsp me_cmp"
+ac3_fixed_encoder_select="ac3dsp audiodsp me_cmp"
+acelp_kelvin_decoder_select="audiodsp"
+adpcm_g722_decoder_select="g722dsp"
+adpcm_g722_encoder_select="g722dsp"
+agm_decoder_select="idctdsp"
+aic_decoder_select="golomb idctdsp"
+alac_encoder_select="lpc"
+als_decoder_select="bswapdsp mpeg4audio"
+amrnb_decoder_select="lsp"
+amrwb_decoder_select="lsp"
+amv_decoder_select="sp5x_decoder exif"
+amv_encoder_select="jpegtables mpegvideoenc"
+ape_decoder_select="bswapdsp llauddsp"
+apng_decoder_select="inflate_wrapper"
+apng_encoder_select="deflate_wrapper llvidencdsp"
+aptx_encoder_select="audio_frame_queue"
+aptx_hd_encoder_select="audio_frame_queue"
+asv1_decoder_select="blockdsp bswapdsp idctdsp"
+asv1_encoder_select="aandcttables bswapdsp fdctdsp pixblockdsp"
+asv2_decoder_select="blockdsp bswapdsp idctdsp"
+asv2_encoder_select="aandcttables bswapdsp fdctdsp pixblockdsp"
+atrac1_decoder_select="sinewin"
+av1_decoder_select="av1_frame_split_bsf cbs_av1"
+bink_decoder_select="blockdsp hpeldsp"
+binkaudio_dct_decoder_select="wma_freqs"
+binkaudio_rdft_decoder_select="wma_freqs"
+cavs_decoder_select="blockdsp golomb h264chroma idctdsp qpeldsp videodsp"
+clearvideo_decoder_select="idctdsp"
+cllc_decoder_select="bswapdsp"
+comfortnoise_encoder_select="lpc"
+cook_decoder_select="audiodsp sinewin"
+cri_decoder_select="mjpeg_decoder"
+cscd_decoder_suggest="zlib"
+dds_decoder_select="texturedsp"
+dirac_decoder_select="dirac_parse dwt golomb videodsp mpegvideoenc"
+dnxhd_decoder_select="blockdsp idctdsp"
+dnxhd_encoder_select="blockdsp fdctdsp idctdsp mpegvideoenc pixblockdsp videodsp"
+dvvideo_decoder_select="dvprofile idctdsp"
+dvvideo_encoder_select="dvprofile fdctdsp me_cmp pixblockdsp"
+dxa_decoder_deps="zlib"
+dxv_decoder_select="lzf texturedsp"
+eac3_decoder_select="ac3_decoder"
+eac3_encoder_select="ac3_encoder"
+eamad_decoder_select="aandcttables blockdsp bswapdsp"
+eatgq_decoder_select="aandcttables"
+eatqi_decoder_select="aandcttables blockdsp bswapdsp"
+exr_decoder_deps="zlib"
+exr_encoder_deps="zlib"
+ffv1_decoder_select="rangecoder"
+ffv1_encoder_select="rangecoder"
+ffvhuff_decoder_select="huffyuv_decoder"
+ffvhuff_encoder_select="huffyuv_encoder"
+fic_decoder_select="golomb"
+flac_encoder_select="bswapdsp lpc"
+flashsv2_decoder_select="inflate_wrapper"
+flashsv2_encoder_select="deflate_wrapper"
+flashsv_decoder_select="inflate_wrapper"
+flashsv_encoder_deps="zlib"
+flv_decoder_select="h263_decoder"
+flv_encoder_select="h263_encoder"
+fourxm_decoder_select="blockdsp bswapdsp"
+fraps_decoder_select="bswapdsp huffman"
+g2m_decoder_deps="zlib"
+g2m_decoder_select="blockdsp idctdsp jpegtables"
+g729_decoder_select="audiodsp"
+h261_decoder_select="mpegvideodec"
+h261_encoder_select="mpegvideoenc"
+h263_decoder_select="h263_parser h263dsp mpegvideodec qpeldsp"
+h263_encoder_select="h263dsp mpegvideoenc"
+h263i_decoder_select="h263_decoder"
+h263p_decoder_select="h263_decoder"
+h263p_encoder_select="h263_encoder"
+h264_decoder_select="cabac golomb h264chroma h264dsp h264parse h264pred h264qpel h264_sei videodsp"
+h264_decoder_suggest="error_resilience"
+hap_decoder_select="snappy texturedsp"
+hap_encoder_deps="libsnappy"
+hap_encoder_select="texturedspenc"
+hevc_decoder_select="bswapdsp cabac dovi_rpu golomb hevcparse hevc_sei videodsp"
+huffyuv_decoder_select="bswapdsp huffyuvdsp llviddsp"
+huffyuv_encoder_select="bswapdsp huffman huffyuvencdsp llvidencdsp"
+hymt_decoder_select="huffyuv_decoder"
+iac_decoder_select="imc_decoder"
+imc_decoder_select="bswapdsp sinewin"
+imm4_decoder_select="bswapdsp idctdsp"
+imm5_decoder_select="h264_decoder hevc_decoder"
+indeo3_decoder_select="hpeldsp"
+indeo4_decoder_select="ividsp"
+indeo5_decoder_select="ividsp"
+interplay_video_decoder_select="hpeldsp"
+ipu_decoder_select="mpegvideodec"
+jpegls_decoder_select="mjpeg_decoder"
+jv_decoder_select="blockdsp"
+lagarith_decoder_select="llviddsp"
+ljpeg_encoder_select="jpegtables"
+lscr_decoder_select="inflate_wrapper"
+magicyuv_decoder_select="llviddsp"
+magicyuv_encoder_select="llvidencdsp"
+mdec_decoder_select="blockdsp bswapdsp idctdsp"
+media100_decoder_select="media100_to_mjpegb_bsf mjpegb_decoder"
+metasound_decoder_select="lsp sinewin"
+mimic_decoder_select="blockdsp bswapdsp hpeldsp idctdsp"
+mjpeg_decoder_select="blockdsp hpeldsp exif idctdsp jpegtables"
+mjpeg_encoder_select="jpegtables mpegvideoenc"
+mjpegb_decoder_select="mjpeg_decoder"
+mlp_decoder_select="mlp_parser"
+mlp_encoder_select="lpc audio_frame_queue"
+mobiclip_decoder_select="bswapdsp golomb"
+motionpixels_decoder_select="bswapdsp"
+mp1_decoder_select="mpegaudio"
+mp1float_decoder_select="mpegaudio"
+mp2_decoder_select="mpegaudio"
+mp2float_decoder_select="mpegaudio"
+mp3_decoder_select="mpegaudio"
+mp3adu_decoder_select="mpegaudio"
+mp3adufloat_decoder_select="mpegaudio"
+mp3float_decoder_select="mpegaudio"
+mp3on4_decoder_select="mpegaudio mpeg4audio"
+mp3on4float_decoder_select="mpegaudio mpeg4audio"
+mpc7_decoder_select="bswapdsp mpegaudiodsp"
+mpc8_decoder_select="mpegaudiodsp"
+mpegvideo_decoder_select="mpegvideodec"
+mpeg1video_decoder_select="mpegvideodec"
+mpeg1video_encoder_select="mpegvideoenc"
+mpeg2video_decoder_select="mpegvideodec"
+mpeg2video_encoder_select="mpegvideoenc"
+mpeg4_decoder_select="h263_decoder mpeg4video_parser"
+mpeg4_encoder_select="h263_encoder qpeldsp"
+msa1_decoder_select="mss34dsp"
+mscc_decoder_select="inflate_wrapper"
+msmpeg4v1_decoder_select="msmpeg4dec"
+msmpeg4v2_decoder_select="msmpeg4dec"
+msmpeg4v2_encoder_select="msmpeg4enc"
+msmpeg4v3_decoder_select="msmpeg4dec"
+msmpeg4v3_encoder_select="msmpeg4enc"
+mss2_decoder_select="mpegvideodec qpeldsp vc1_decoder"
+mts2_decoder_select="jpegtables mss34dsp"
+mv30_decoder_select="aandcttables blockdsp"
+mvha_decoder_select="inflate_wrapper llviddsp"
+mwsc_decoder_select="inflate_wrapper"
+mxpeg_decoder_select="mjpeg_decoder"
+nellymoser_decoder_select="sinewin"
+nellymoser_encoder_select="audio_frame_queue sinewin"
+notchlc_decoder_select="lzf"
+nuv_decoder_select="idctdsp"
+opus_decoder_deps="swresample"
+opus_encoder_select="audio_frame_queue"
+png_decoder_select="inflate_wrapper"
+png_encoder_select="deflate_wrapper llvidencdsp"
+prores_decoder_select="blockdsp idctdsp"
+prores_encoder_select="fdctdsp"
+prores_aw_encoder_select="fdctdsp"
+prores_ks_encoder_select="fdctdsp"
+qcelp_decoder_select="lsp"
+qdm2_decoder_select="mpegaudiodsp"
+ra_144_decoder_select="audiodsp"
+ra_144_encoder_select="audio_frame_queue lpc audiodsp"
+ralf_decoder_select="golomb"
+rasc_decoder_select="inflate_wrapper"
+rawvideo_decoder_select="bswapdsp"
+rscc_decoder_deps="zlib"
+rv10_decoder_select="h263_decoder"
+rv10_encoder_select="h263_encoder"
+rv20_decoder_select="h263_decoder"
+rv20_encoder_select="h263_encoder"
+rv30_decoder_select="golomb h264pred h264qpel mpegvideodec rv34dsp"
+rv40_decoder_select="golomb h264pred h264qpel mpegvideodec rv34dsp"
+screenpresso_decoder_deps="zlib"
+shorten_decoder_select="bswapdsp"
+sipr_decoder_select="lsp"
+smvjpeg_decoder_select="mjpeg_decoder"
+snow_decoder_select="dwt h264qpel hpeldsp rangecoder videodsp"
+snow_encoder_select="dwt h264qpel hpeldsp me_cmp mpegvideoenc rangecoder videodsp"
+sonic_decoder_select="golomb rangecoder"
+sonic_encoder_select="golomb rangecoder"
+sonic_ls_encoder_select="golomb rangecoder"
+sp5x_decoder_select="mjpeg_decoder"
+speedhq_decoder_select="blockdsp idctdsp"
+speedhq_encoder_select="mpegvideoenc"
+srgc_decoder_select="inflate_wrapper"
+svq1_decoder_select="hpeldsp"
+svq1_encoder_select="hpeldsp me_cmp mpegvideoenc"
+svq3_decoder_select="golomb h264dsp h264parse h264pred hpeldsp tpeldsp videodsp"
+svq3_decoder_suggest="zlib"
+tak_decoder_select="audiodsp"
+tdsc_decoder_deps="zlib"
+tdsc_decoder_select="mjpeg_decoder"
+theora_decoder_select="vp3_decoder"
+thp_decoder_select="mjpeg_decoder"
+tiff_decoder_select="mjpeg_decoder"
+tiff_decoder_suggest="zlib lzma"
+tiff_encoder_suggest="zlib"
+truehd_decoder_select="mlp_parser"
+truehd_encoder_select="lpc audio_frame_queue"
+truemotion2_decoder_select="bswapdsp"
+truespeech_decoder_select="bswapdsp"
+tscc_decoder_select="inflate_wrapper"
+twinvq_decoder_select="lsp sinewin"
+txd_decoder_select="texturedsp"
+utvideo_decoder_select="bswapdsp llviddsp"
+utvideo_encoder_select="bswapdsp huffman llvidencdsp"
+vble_decoder_select="llviddsp"
+vbn_decoder_select="texturedsp"
+vbn_encoder_select="texturedspenc"
+vc1_decoder_select="blockdsp h264qpel intrax8 mpegvideodec qpeldsp vc1dsp"
+vc1image_decoder_select="vc1_decoder"
+vorbis_encoder_select="audio_frame_queue"
+vp3_decoder_select="hpeldsp vp3dsp videodsp"
+vp4_decoder_select="vp3_decoder"
+vp5_decoder_select="h264chroma hpeldsp videodsp vp3dsp vp56dsp"
+vp6_decoder_select="h264chroma hpeldsp huffman videodsp vp3dsp vp56dsp"
+vp6a_decoder_select="vp6_decoder"
+vp6f_decoder_select="vp6_decoder"
+vp7_decoder_select="h264pred videodsp vp8dsp"
+vp8_decoder_select="h264pred videodsp vp8dsp"
+vp9_decoder_select="videodsp vp9_parser vp9_superframe_split_bsf"
+wcmv_decoder_select="inflate_wrapper"
+webp_decoder_select="vp8_decoder exif"
+wmalossless_decoder_select="llauddsp"
+wmapro_decoder_select="sinewin wma_freqs"
+wmav1_decoder_select="sinewin wma_freqs"
+wmav1_encoder_select="sinewin wma_freqs"
+wmav2_decoder_select="sinewin wma_freqs"
+wmav2_encoder_select="sinewin wma_freqs"
+wmavoice_decoder_select="lsp rdft dct sinewin"
+wmv1_decoder_select="msmpeg4dec"
+wmv1_encoder_select="msmpeg4enc"
+wmv2_decoder_select="blockdsp error_resilience idctdsp intrax8 msmpeg4dec videodsp wmv2dsp"
+wmv2_encoder_select="msmpeg4enc wmv2dsp"
+wmv3_decoder_select="vc1_decoder"
+wmv3image_decoder_select="wmv3_decoder"
+xma1_decoder_select="wmapro_decoder"
+xma2_decoder_select="wmapro_decoder"
+ylc_decoder_select="bswapdsp"
+zerocodec_decoder_select="inflate_wrapper"
+zlib_decoder_select="inflate_wrapper"
+zlib_encoder_select="deflate_wrapper"
+zmbv_decoder_select="inflate_wrapper"
+zmbv_encoder_select="deflate_wrapper"
+
+# hardware accelerators
+crystalhd_deps="libcrystalhd_libcrystalhd_if_h"
+cuda_deps="ffnvcodec"
+cuvid_deps="ffnvcodec"
+d3d11va_deps="dxva_h ID3D11VideoDecoder ID3D11VideoContext"
+dxva2_deps="dxva2api_h DXVA2_ConfigPictureDecode ole32 user32"
+ffnvcodec_deps_any="libdl LoadLibrary"
+nvdec_deps="ffnvcodec"
+vaapi_x11_deps="xlib_x11"
+videotoolbox_hwaccel_deps="videotoolbox pthreads"
+videotoolbox_hwaccel_extralibs="-framework QuartzCore"
+vulkan_deps_any="libdl LoadLibrary"
+
+av1_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_AV1"
+av1_d3d11va_hwaccel_select="av1_decoder"
+av1_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_AV1"
+av1_d3d11va2_hwaccel_select="av1_decoder"
+av1_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_AV1"
+av1_dxva2_hwaccel_select="av1_decoder"
+av1_nvdec_hwaccel_deps="nvdec CUVIDAV1PICPARAMS"
+av1_nvdec_hwaccel_select="av1_decoder"
+av1_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferAV1_bit_depth_idx"
+av1_vaapi_hwaccel_select="av1_decoder"
+av1_vdpau_hwaccel_deps="vdpau VdpPictureInfoAV1"
+av1_vdpau_hwaccel_select="av1_decoder"
+h263_vaapi_hwaccel_deps="vaapi"
+h263_vaapi_hwaccel_select="h263_decoder"
+h263_videotoolbox_hwaccel_deps="videotoolbox"
+h263_videotoolbox_hwaccel_select="h263_decoder"
+h264_d3d11va_hwaccel_deps="d3d11va"
+h264_d3d11va_hwaccel_select="h264_decoder"
+h264_d3d11va2_hwaccel_deps="d3d11va"
+h264_d3d11va2_hwaccel_select="h264_decoder"
+h264_dxva2_hwaccel_deps="dxva2"
+h264_dxva2_hwaccel_select="h264_decoder"
+h264_nvdec_hwaccel_deps="nvdec"
+h264_nvdec_hwaccel_select="h264_decoder"
+h264_vaapi_hwaccel_deps="vaapi"
+h264_vaapi_hwaccel_select="h264_decoder"
+h264_vdpau_hwaccel_deps="vdpau"
+h264_vdpau_hwaccel_select="h264_decoder"
+h264_videotoolbox_hwaccel_deps="videotoolbox"
+h264_videotoolbox_hwaccel_select="h264_decoder"
+hevc_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
+hevc_d3d11va_hwaccel_select="hevc_decoder"
+hevc_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_HEVC"
+hevc_d3d11va2_hwaccel_select="hevc_decoder"
+hevc_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_HEVC"
+hevc_dxva2_hwaccel_select="hevc_decoder"
+hevc_nvdec_hwaccel_deps="nvdec"
+hevc_nvdec_hwaccel_select="hevc_decoder"
+hevc_vaapi_hwaccel_deps="vaapi VAPictureParameterBufferHEVC"
+hevc_vaapi_hwaccel_select="hevc_decoder"
+hevc_vdpau_hwaccel_deps="vdpau VdpPictureInfoHEVC"
+hevc_vdpau_hwaccel_select="hevc_decoder"
+hevc_videotoolbox_hwaccel_deps="videotoolbox"
+hevc_videotoolbox_hwaccel_select="hevc_decoder"
+mjpeg_nvdec_hwaccel_deps="nvdec"
+mjpeg_nvdec_hwaccel_select="mjpeg_decoder"
+mjpeg_vaapi_hwaccel_deps="vaapi"
+mjpeg_vaapi_hwaccel_select="mjpeg_decoder"
+mpeg1_nvdec_hwaccel_deps="nvdec"
+mpeg1_nvdec_hwaccel_select="mpeg1video_decoder"
+mpeg1_vdpau_hwaccel_deps="vdpau"
+mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
+mpeg1_videotoolbox_hwaccel_deps="videotoolbox"
+mpeg1_videotoolbox_hwaccel_select="mpeg1video_decoder"
+mpeg2_d3d11va_hwaccel_deps="d3d11va"
+mpeg2_d3d11va_hwaccel_select="mpeg2video_decoder"
+mpeg2_d3d11va2_hwaccel_deps="d3d11va"
+mpeg2_d3d11va2_hwaccel_select="mpeg2video_decoder"
+mpeg2_dxva2_hwaccel_deps="dxva2"
+mpeg2_dxva2_hwaccel_select="mpeg2video_decoder"
+mpeg2_nvdec_hwaccel_deps="nvdec"
+mpeg2_nvdec_hwaccel_select="mpeg2video_decoder"
+mpeg2_vaapi_hwaccel_deps="vaapi"
+mpeg2_vaapi_hwaccel_select="mpeg2video_decoder"
+mpeg2_vdpau_hwaccel_deps="vdpau"
+mpeg2_vdpau_hwaccel_select="mpeg2video_decoder"
+mpeg2_videotoolbox_hwaccel_deps="videotoolbox"
+mpeg2_videotoolbox_hwaccel_select="mpeg2video_decoder"
+mpeg4_nvdec_hwaccel_deps="nvdec"
+mpeg4_nvdec_hwaccel_select="mpeg4_decoder"
+mpeg4_vaapi_hwaccel_deps="vaapi"
+mpeg4_vaapi_hwaccel_select="mpeg4_decoder"
+mpeg4_vdpau_hwaccel_deps="vdpau"
+mpeg4_vdpau_hwaccel_select="mpeg4_decoder"
+mpeg4_videotoolbox_hwaccel_deps="videotoolbox"
+mpeg4_videotoolbox_hwaccel_select="mpeg4_decoder"
+prores_videotoolbox_hwaccel_deps="videotoolbox"
+prores_videotoolbox_hwaccel_select="prores_decoder"
+vc1_d3d11va_hwaccel_deps="d3d11va"
+vc1_d3d11va_hwaccel_select="vc1_decoder"
+vc1_d3d11va2_hwaccel_deps="d3d11va"
+vc1_d3d11va2_hwaccel_select="vc1_decoder"
+vc1_dxva2_hwaccel_deps="dxva2"
+vc1_dxva2_hwaccel_select="vc1_decoder"
+vc1_nvdec_hwaccel_deps="nvdec"
+vc1_nvdec_hwaccel_select="vc1_decoder"
+vc1_vaapi_hwaccel_deps="vaapi"
+vc1_vaapi_hwaccel_select="vc1_decoder"
+vc1_vdpau_hwaccel_deps="vdpau"
+vc1_vdpau_hwaccel_select="vc1_decoder"
+vp8_nvdec_hwaccel_deps="nvdec"
+vp8_nvdec_hwaccel_select="vp8_decoder"
+vp8_vaapi_hwaccel_deps="vaapi"
+vp8_vaapi_hwaccel_select="vp8_decoder"
+vp9_d3d11va_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
+vp9_d3d11va_hwaccel_select="vp9_decoder"
+vp9_d3d11va2_hwaccel_deps="d3d11va DXVA_PicParams_VP9"
+vp9_d3d11va2_hwaccel_select="vp9_decoder"
+vp9_dxva2_hwaccel_deps="dxva2 DXVA_PicParams_VP9"
+vp9_dxva2_hwaccel_select="vp9_decoder"
+vp9_nvdec_hwaccel_deps="nvdec"
+vp9_nvdec_hwaccel_select="vp9_decoder"
+vp9_vaapi_hwaccel_deps="vaapi VADecPictureParameterBufferVP9_bit_depth"
+vp9_vaapi_hwaccel_select="vp9_decoder"
+vp9_vdpau_hwaccel_deps="vdpau VdpPictureInfoVP9"
+vp9_vdpau_hwaccel_select="vp9_decoder"
+vp9_videotoolbox_hwaccel_deps="videotoolbox"
+vp9_videotoolbox_hwaccel_select="vp9_decoder"
+wmv3_d3d11va_hwaccel_select="vc1_d3d11va_hwaccel"
+wmv3_d3d11va2_hwaccel_select="vc1_d3d11va2_hwaccel"
+wmv3_dxva2_hwaccel_select="vc1_dxva2_hwaccel"
+wmv3_nvdec_hwaccel_select="vc1_nvdec_hwaccel"
+wmv3_vaapi_hwaccel_select="vc1_vaapi_hwaccel"
+wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
+
+# hardware-accelerated codecs
+mediafoundation_deps="mftransform_h MFCreateAlignedMemoryBuffer"
+omx_deps="libdl pthreads"
+omx_rpi_select="omx"
+qsv_deps="libmfx"
+qsvdec_select="qsv"
+qsvenc_select="qsv"
+qsvvpp_select="qsv"
+vaapi_encode_deps="vaapi"
+v4l2_m2m_deps="linux_videodev2_h sem_timedwait"
+
+bilateral_cuda_filter_deps="ffnvcodec"
+bilateral_cuda_filter_deps_any="cuda_nvcc cuda_llvm"
+chromakey_cuda_filter_deps="ffnvcodec"
+chromakey_cuda_filter_deps_any="cuda_nvcc cuda_llvm"
+colorspace_cuda_filter_deps="ffnvcodec"
+colorspace_cuda_filter_deps_any="cuda_nvcc cuda_llvm"
+hwupload_cuda_filter_deps="ffnvcodec"
+scale_npp_filter_deps="ffnvcodec libnpp"
+scale2ref_npp_filter_deps="ffnvcodec libnpp"
+scale_cuda_filter_deps="ffnvcodec"
+scale_cuda_filter_deps_any="cuda_nvcc cuda_llvm"
+thumbnail_cuda_filter_deps="ffnvcodec"
+thumbnail_cuda_filter_deps_any="cuda_nvcc cuda_llvm"
+transpose_npp_filter_deps="ffnvcodec libnpp"
+overlay_cuda_filter_deps="ffnvcodec"
+overlay_cuda_filter_deps_any="cuda_nvcc cuda_llvm"
+sharpen_npp_filter_deps="ffnvcodec libnpp"
+
+ddagrab_filter_deps="d3d11va IDXGIOutput1 DXGI_OUTDUPL_FRAME_INFO"
+
+amf_deps_any="libdl LoadLibrary"
+nvenc_deps="ffnvcodec"
+nvenc_deps_any="libdl LoadLibrary"
+
+aac_mf_encoder_deps="mediafoundation"
+ac3_mf_encoder_deps="mediafoundation"
+av1_cuvid_decoder_deps="cuvid CUVIDAV1PICPARAMS"
+av1_mediacodec_decoder_deps="mediacodec"
+av1_mediacodec_decoder_extralibs="-landroid"
+av1_nvenc_encoder_deps="nvenc NV_ENC_PIC_PARAMS_AV1"
+av1_nvenc_encoder_select="atsc_a53"
+h263_v4l2m2m_decoder_deps="v4l2_m2m h263_v4l2_m2m"
+h263_v4l2m2m_encoder_deps="v4l2_m2m h263_v4l2_m2m"
+h264_amf_encoder_deps="amf"
+h264_crystalhd_decoder_select="crystalhd h264_mp4toannexb_bsf h264_parser"
+h264_cuvid_decoder_deps="cuvid"
+h264_cuvid_decoder_select="h264_mp4toannexb_bsf"
+h264_mediacodec_decoder_deps="mediacodec"
+h264_mediacodec_decoder_extralibs="-landroid"
+h264_mediacodec_decoder_select="h264_mp4toannexb_bsf h264_parser"
+h264_mediacodec_encoder_deps="mediacodec"
+h264_mediacodec_encoder_extralibs="-landroid"
+h264_mediacodec_encoder_select="h264_metadata"
+h264_mf_encoder_deps="mediafoundation"
+h264_mmal_decoder_deps="mmal"
+h264_nvenc_encoder_deps="nvenc"
+h264_nvenc_encoder_select="atsc_a53"
+h264_omx_encoder_deps="omx"
+h264_qsv_decoder_select="h264_mp4toannexb_bsf qsvdec"
+h264_qsv_encoder_select="atsc_a53 qsvenc"
+h264_rkmpp_decoder_deps="rkmpp"
+h264_rkmpp_decoder_select="h264_mp4toannexb_bsf"
+h264_vaapi_encoder_select="atsc_a53 cbs_h264 vaapi_encode"
+h264_v4l2m2m_decoder_deps="v4l2_m2m h264_v4l2_m2m"
+h264_v4l2m2m_decoder_select="h264_mp4toannexb_bsf"
+h264_v4l2m2m_encoder_deps="v4l2_m2m h264_v4l2_m2m"
+hevc_amf_encoder_deps="amf"
+hevc_cuvid_decoder_deps="cuvid"
+hevc_cuvid_decoder_select="hevc_mp4toannexb_bsf"
+hevc_mediacodec_decoder_deps="mediacodec"
+hevc_mediacodec_decoder_extralibs="-landroid"
+hevc_mediacodec_decoder_select="hevc_mp4toannexb_bsf hevc_parser"
+hevc_mediacodec_encoder_deps="mediacodec"
+hevc_mediacodec_encoder_extralibs="-landroid"
+hevc_mediacodec_encoder_select="hevc_metadata"
+hevc_mf_encoder_deps="mediafoundation"
+hevc_nvenc_encoder_deps="nvenc"
+hevc_nvenc_encoder_select="atsc_a53"
+hevc_qsv_decoder_select="hevc_mp4toannexb_bsf qsvdec"
+hevc_qsv_encoder_select="hevcparse qsvenc"
+hevc_rkmpp_decoder_deps="rkmpp"
+hevc_rkmpp_decoder_select="hevc_mp4toannexb_bsf"
+hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
+hevc_vaapi_encoder_select="atsc_a53 cbs_h265 vaapi_encode"
+hevc_v4l2m2m_decoder_deps="v4l2_m2m hevc_v4l2_m2m"
+hevc_v4l2m2m_decoder_select="hevc_mp4toannexb_bsf"
+hevc_v4l2m2m_encoder_deps="v4l2_m2m hevc_v4l2_m2m"
+mjpeg_cuvid_decoder_deps="cuvid"
+mjpeg_qsv_decoder_select="qsvdec"
+mjpeg_qsv_encoder_deps="libmfx"
+mjpeg_qsv_encoder_select="qsvenc"
+mjpeg_vaapi_encoder_deps="VAEncPictureParameterBufferJPEG"
+mjpeg_vaapi_encoder_select="cbs_jpeg jpegtables vaapi_encode"
+mp3_mf_encoder_deps="mediafoundation"
+mpeg1_cuvid_decoder_deps="cuvid"
+mpeg1_v4l2m2m_decoder_deps="v4l2_m2m mpeg1_v4l2_m2m"
+mpeg2_crystalhd_decoder_select="crystalhd"
+mpeg2_cuvid_decoder_deps="cuvid"
+mpeg2_mmal_decoder_deps="mmal"
+mpeg2_mediacodec_decoder_deps="mediacodec"
+mpeg2_qsv_decoder_select="qsvdec"
+mpeg2_qsv_encoder_select="qsvenc"
+mpeg2_vaapi_encoder_select="cbs_mpeg2 vaapi_encode"
+mpeg2_v4l2m2m_decoder_deps="v4l2_m2m mpeg2_v4l2_m2m"
+mpeg4_crystalhd_decoder_select="crystalhd"
+mpeg4_cuvid_decoder_deps="cuvid"
+mpeg4_mediacodec_decoder_deps="mediacodec"
+mpeg4_mmal_decoder_deps="mmal"
+mpeg4_omx_encoder_deps="omx"
+mpeg4_v4l2m2m_decoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
+mpeg4_v4l2m2m_encoder_deps="v4l2_m2m mpeg4_v4l2_m2m"
+msmpeg4_crystalhd_decoder_select="crystalhd"
+vc1_crystalhd_decoder_select="crystalhd"
+vc1_cuvid_decoder_deps="cuvid"
+vc1_mmal_decoder_deps="mmal"
+vc1_qsv_decoder_select="qsvdec"
+vc1_v4l2m2m_decoder_deps="v4l2_m2m vc1_v4l2_m2m"
+vp8_cuvid_decoder_deps="cuvid"
+vp8_mediacodec_decoder_deps="mediacodec"
+vp8_qsv_decoder_select="qsvdec"
+vp8_rkmpp_decoder_deps="rkmpp"
+vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
+vp8_vaapi_encoder_select="vaapi_encode"
+vp8_v4l2m2m_decoder_deps="v4l2_m2m vp8_v4l2_m2m"
+vp8_v4l2m2m_encoder_deps="v4l2_m2m vp8_v4l2_m2m"
+vp9_cuvid_decoder_deps="cuvid"
+vp9_mediacodec_decoder_deps="mediacodec"
+vp9_qsv_decoder_select="qsvdec"
+vp9_rkmpp_decoder_deps="rkmpp"
+vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
+vp9_vaapi_encoder_select="vaapi_encode"
+vp9_qsv_encoder_deps="libmfx MFX_CODEC_VP9"
+vp9_qsv_encoder_select="qsvenc"
+vp9_v4l2m2m_decoder_deps="v4l2_m2m vp9_v4l2_m2m"
+wmv3_crystalhd_decoder_select="crystalhd"
+av1_qsv_decoder_select="qsvdec"
+av1_qsv_encoder_select="qsvenc"
+av1_qsv_encoder_deps="libvpl"
+av1_amf_encoder_deps="amf"
+
+# parsers
+aac_parser_select="adts_header mpeg4audio"
+av1_parser_select="cbs_av1"
+h264_parser_select="golomb h264dsp h264parse h264_sei"
+hevc_parser_select="hevcparse hevc_sei"
+mpegaudio_parser_select="mpegaudioheader"
+mpeg4video_parser_select="h263dsp mpegvideodec qpeldsp"
+vc1_parser_select="vc1dsp"
+
+# bitstream_filters
+aac_adtstoasc_bsf_select="adts_header mpeg4audio"
+av1_frame_merge_bsf_select="cbs_av1"
+av1_frame_split_bsf_select="cbs_av1"
+av1_metadata_bsf_select="cbs_av1"
+dts2pts_bsf_select="cbs_h264 h264parse"
+eac3_core_bsf_select="ac3_parser"
+filter_units_bsf_select="cbs"
+h264_metadata_bsf_deps="const_nan"
+h264_metadata_bsf_select="cbs_h264"
+h264_redundant_pps_bsf_select="cbs_h264"
+hevc_metadata_bsf_select="cbs_h265"
+mjpeg2jpeg_bsf_select="jpegtables"
+mpeg2_metadata_bsf_select="cbs_mpeg2"
+trace_headers_bsf_select="cbs"
+vp9_metadata_bsf_select="cbs_vp9"
+
+# external libraries
+aac_at_decoder_deps="audiotoolbox"
+aac_at_decoder_select="aac_adtstoasc_bsf"
+ac3_at_decoder_deps="audiotoolbox"
+ac3_at_decoder_select="ac3_parser"
+adpcm_ima_qt_at_decoder_deps="audiotoolbox"
+alac_at_decoder_deps="audiotoolbox"
+amr_nb_at_decoder_deps="audiotoolbox"
+avisynth_deps_any="libdl LoadLibrary"
+avisynth_demuxer_deps="avisynth"
+avisynth_demuxer_select="riffdec"
+eac3_at_decoder_deps="audiotoolbox"
+eac3_at_decoder_select="ac3_parser"
+gsm_ms_at_decoder_deps="audiotoolbox"
+ilbc_at_decoder_deps="audiotoolbox"
+mp1_at_decoder_deps="audiotoolbox"
+mp2_at_decoder_deps="audiotoolbox"
+mp3_at_decoder_deps="audiotoolbox"
+mp1_at_decoder_select="mpegaudioheader"
+mp2_at_decoder_select="mpegaudioheader"
+mp3_at_decoder_select="mpegaudioheader"
+pcm_alaw_at_decoder_deps="audiotoolbox"
+pcm_mulaw_at_decoder_deps="audiotoolbox"
+qdmc_at_decoder_deps="audiotoolbox"
+qdm2_at_decoder_deps="audiotoolbox"
+aac_at_encoder_deps="audiotoolbox"
+aac_at_encoder_select="audio_frame_queue"
+alac_at_encoder_deps="audiotoolbox"
+alac_at_encoder_select="audio_frame_queue"
+ilbc_at_encoder_deps="audiotoolbox"
+ilbc_at_encoder_select="audio_frame_queue"
+pcm_alaw_at_encoder_deps="audiotoolbox"
+pcm_alaw_at_encoder_select="audio_frame_queue"
+pcm_mulaw_at_encoder_deps="audiotoolbox"
+pcm_mulaw_at_encoder_select="audio_frame_queue"
+chromaprint_muxer_deps="chromaprint"
+h264_videotoolbox_encoder_deps="pthreads"
+h264_videotoolbox_encoder_select="atsc_a53 videotoolbox_encoder"
+hevc_videotoolbox_encoder_deps="pthreads"
+hevc_videotoolbox_encoder_select="atsc_a53 videotoolbox_encoder"
+prores_videotoolbox_encoder_deps="pthreads"
+prores_videotoolbox_encoder_select="videotoolbox_encoder"
+libaom_av1_decoder_deps="libaom"
+libaom_av1_encoder_deps="libaom"
+libaom_av1_encoder_select="extract_extradata_bsf"
+libaribb24_decoder_deps="libaribb24"
+libcelt_decoder_deps="libcelt"
+libcodec2_decoder_deps="libcodec2"
+libcodec2_encoder_deps="libcodec2"
+libdav1d_decoder_deps="libdav1d"
+libdav1d_decoder_select="atsc_a53"
+libdavs2_decoder_deps="libdavs2"
+libdavs2_decoder_select="avs2_parser"
+libfdk_aac_decoder_deps="libfdk_aac"
+libfdk_aac_encoder_deps="libfdk_aac"
+libfdk_aac_encoder_select="audio_frame_queue"
+libgme_demuxer_deps="libgme"
+libgsm_decoder_deps="libgsm"
+libgsm_encoder_deps="libgsm"
+libgsm_ms_decoder_deps="libgsm"
+libgsm_ms_encoder_deps="libgsm"
+libilbc_decoder_deps="libilbc"
+libilbc_encoder_deps="libilbc"
+libjxl_decoder_deps="libjxl libjxl_threads"
+libjxl_encoder_deps="libjxl libjxl_threads"
+libkvazaar_encoder_deps="libkvazaar"
+libmodplug_demuxer_deps="libmodplug"
+libmp3lame_encoder_deps="libmp3lame"
+libmp3lame_encoder_select="audio_frame_queue mpegaudioheader"
+libopencore_amrnb_decoder_deps="libopencore_amrnb"
+libopencore_amrnb_encoder_deps="libopencore_amrnb"
+libopencore_amrnb_encoder_select="audio_frame_queue"
+libopencore_amrwb_decoder_deps="libopencore_amrwb"
+libopenh264_decoder_deps="libopenh264"
+libopenh264_decoder_select="h264_mp4toannexb_bsf"
+libopenh264_encoder_deps="libopenh264"
+libopenjpeg_decoder_deps="libopenjpeg"
+libopenjpeg_encoder_deps="libopenjpeg"
+libopenmpt_demuxer_deps="libopenmpt"
+libopus_decoder_deps="libopus"
+libopus_encoder_deps="libopus"
+libopus_encoder_select="audio_frame_queue"
+librav1e_encoder_deps="librav1e"
+librsvg_decoder_deps="librsvg"
+libshine_encoder_deps="libshine"
+libshine_encoder_select="audio_frame_queue mpegaudioheader"
+libspeex_decoder_deps="libspeex"
+libspeex_encoder_deps="libspeex"
+libspeex_encoder_select="audio_frame_queue"
+libsvtav1_encoder_deps="libsvtav1"
+libtheora_encoder_deps="libtheora"
+libtwolame_encoder_deps="libtwolame"
+libuavs3d_decoder_deps="libuavs3d"
+libvo_amrwbenc_encoder_deps="libvo_amrwbenc"
+libvorbis_decoder_deps="libvorbis"
+libvorbis_encoder_deps="libvorbis libvorbisenc"
+libvorbis_encoder_select="audio_frame_queue"
+libvpx_vp8_decoder_deps="libvpx"
+libvpx_vp8_encoder_deps="libvpx"
+libvpx_vp9_decoder_deps="libvpx"
+libvpx_vp9_encoder_deps="libvpx"
+libwebp_encoder_deps="libwebp"
+libwebp_anim_encoder_deps="libwebp"
+libx262_encoder_deps="libx262"
+libx264_encoder_deps="libx264"
+libx264_encoder_select="atsc_a53"
+libx264rgb_encoder_deps="libx264"
+libx264rgb_encoder_select="libx264_encoder"
+libx265_encoder_deps="libx265"
+libx265_encoder_select="atsc_a53"
+libxavs_encoder_deps="libxavs"
+libxavs2_encoder_deps="libxavs2"
+libxvid_encoder_deps="libxvid"
+libzvbi_teletext_decoder_deps="libzvbi"
+vapoursynth_demuxer_deps="vapoursynth"
+videotoolbox_suggest="coreservices"
+videotoolbox_deps="corefoundation coremedia corevideo"
+videotoolbox_encoder_deps="videotoolbox VTCompressionSessionPrepareToEncodeFrames"
+
+# demuxers / muxers
+ac3_demuxer_select="ac3_parser"
+act_demuxer_select="riffdec"
+adts_muxer_select="mpeg4audio"
+aiff_muxer_select="iso_media"
+amv_muxer_select="riffenc"
+asf_demuxer_select="riffdec"
+asf_o_demuxer_select="riffdec"
+asf_muxer_select="riffenc"
+asf_stream_muxer_select="asf_muxer"
+av1_demuxer_select="av1_frame_merge_bsf av1_parser"
+avi_demuxer_select="riffdec exif"
+avi_muxer_select="riffenc"
+avif_muxer_select="mov_muxer"
+caf_demuxer_select="iso_media"
+caf_muxer_select="iso_media"
+dash_muxer_select="mp4_muxer"
+dash_demuxer_deps="libxml2"
+dirac_demuxer_select="dirac_parser"
+dts_demuxer_select="dca_parser"
+dtshd_demuxer_select="dca_parser"
+dv_demuxer_select="dvprofile"
+dv_muxer_select="dvprofile"
+dxa_demuxer_select="riffdec"
+eac3_demuxer_select="ac3_parser"
+f4v_muxer_select="mov_muxer"
+fifo_muxer_deps="threads"
+flac_demuxer_select="flac_parser"
+flv_muxer_select="aac_adtstoasc_bsf"
+gxf_muxer_select="pcm_rechunk_bsf"
+hds_muxer_select="flv_muxer"
+hls_demuxer_select="adts_header ac3_parser mov_demuxer mpegts_demuxer"
+hls_muxer_select="mov_muxer mpegts_muxer"
+hls_muxer_suggest="gcrypt openssl"
+image2_alias_pix_demuxer_select="image2_demuxer"
+image2_brender_pix_demuxer_select="image2_demuxer"
+imf_demuxer_deps="libxml2"
+imf_demuxer_select="mxf_demuxer"
+ipod_muxer_select="mov_muxer"
+ismv_muxer_select="mov_muxer"
+ivf_muxer_select="av1_metadata_bsf vp9_superframe_bsf"
+latm_muxer_select="aac_adtstoasc_bsf mpeg4audio"
+matroska_audio_muxer_select="matroska_muxer"
+matroska_demuxer_select="riffdec"
+matroska_demuxer_suggest="bzlib zlib"
+matroska_muxer_select="mpeg4audio riffenc aac_adtstoasc_bsf pgs_frame_merge_bsf vp9_superframe_bsf"
+mlp_demuxer_select="mlp_parser"
+mmf_muxer_select="riffenc"
+mov_demuxer_select="iso_media riffdec"
+mov_demuxer_suggest="zlib"
+mov_muxer_select="iso_media riffenc rtpenc_chain vp9_superframe_bsf aac_adtstoasc_bsf ac3_parser"
+mp3_demuxer_select="mpegaudio_parser"
+mp3_muxer_select="mpegaudioheader"
+mp4_muxer_select="mov_muxer"
+mpegts_demuxer_select="iso_media"
+mpegts_muxer_select="ac3_parser adts_muxer latm_muxer h264_mp4toannexb_bsf hevc_mp4toannexb_bsf"
+mpegtsraw_demuxer_select="mpegts_demuxer"
+mxf_muxer_select="pcm_rechunk_bsf"
+mxf_d10_muxer_select="mxf_muxer"
+mxf_opatom_muxer_select="mxf_muxer"
+nut_muxer_select="riffenc"
+nuv_demuxer_select="riffdec"
+obu_demuxer_select="av1_frame_merge_bsf av1_parser"
+obu_muxer_select="av1_metadata_bsf"
+oga_muxer_select="ogg_muxer"
+ogg_demuxer_select="dirac_parse"
+ogv_muxer_select="ogg_muxer"
+opus_muxer_select="ogg_muxer"
+psp_muxer_select="mov_muxer"
+rtp_demuxer_select="sdp_demuxer"
+rtp_mpegts_muxer_select="mpegts_muxer rtp_muxer"
+rtpdec_select="asf_demuxer mov_demuxer mpegts_demuxer rm_demuxer rtp_protocol srtp"
+rtsp_demuxer_select="http_protocol rtpdec"
+rtsp_muxer_select="rtp_muxer http_protocol rtp_protocol rtpenc_chain"
+sap_demuxer_select="sdp_demuxer"
+sap_muxer_select="rtp_muxer rtp_protocol rtpenc_chain"
+sdp_demuxer_select="rtpdec"
+smoothstreaming_muxer_select="ismv_muxer"
+spdif_demuxer_select="adts_header"
+spdif_muxer_select="adts_header"
+spx_muxer_select="ogg_muxer"
+swf_demuxer_suggest="zlib"
+tak_demuxer_select="tak_parser"
+truehd_demuxer_select="mlp_parser"
+tg2_muxer_select="mov_muxer"
+tgp_muxer_select="mov_muxer"
+vobsub_demuxer_select="mpegps_demuxer"
+w64_demuxer_select="wav_demuxer"
+w64_muxer_select="wav_muxer"
+wav_demuxer_select="riffdec"
+wav_muxer_select="riffenc"
+webm_chunk_muxer_select="webm_muxer"
+webm_dash_manifest_demuxer_select="matroska_demuxer"
+wtv_demuxer_select="mpegts_demuxer riffdec"
+wtv_muxer_select="mpegts_muxer riffenc"
+xmv_demuxer_select="riffdec"
+xwma_demuxer_select="riffdec"
+
+# indevs / outdevs
+android_camera_indev_deps="android camera2ndk mediandk pthreads"
+android_camera_indev_extralibs="-landroid -lcamera2ndk -lmediandk"
+alsa_indev_deps="alsa"
+alsa_outdev_deps="alsa"
+avfoundation_indev_deps="avfoundation corevideo coremedia pthreads"
+avfoundation_indev_suggest="coregraphics applicationservices"
+avfoundation_indev_extralibs="-framework Foundation"
+audiotoolbox_outdev_deps="audiotoolbox pthreads"
+audiotoolbox_outdev_extralibs="-framework AudioToolbox -framework CoreAudio"
+bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
+caca_outdev_deps="libcaca"
+decklink_deps_any="libdl LoadLibrary"
+decklink_indev_deps="decklink threads"
+decklink_indev_extralibs="-lstdc++"
+decklink_indev_suggest="libzvbi"
+decklink_outdev_deps="decklink threads"
+decklink_outdev_suggest="libklvanc"
+decklink_outdev_extralibs="-lstdc++"
+dshow_indev_deps="IBaseFilter"
+dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid -loleaut32 -lshlwapi"
+fbdev_indev_deps="linux_fb_h"
+fbdev_outdev_deps="linux_fb_h"
+gdigrab_indev_deps="CreateDIBSection"
+gdigrab_indev_extralibs="-lgdi32"
+gdigrab_indev_select="bmp_decoder"
+iec61883_indev_deps="libiec61883"
+iec61883_indev_select="dv_demuxer"
+jack_indev_deps="libjack"
+jack_indev_deps_any="sem_timedwait dispatch_dispatch_h"
+kmsgrab_indev_deps="libdrm"
+lavfi_indev_deps="avfilter"
+libcdio_indev_deps="libcdio"
+libdc1394_indev_deps="libdc1394"
+openal_indev_deps="openal"
+opengl_outdev_deps="opengl"
+opengl_outdev_suggest="sdl2"
+oss_indev_deps_any="sys_soundcard_h"
+oss_outdev_deps_any="sys_soundcard_h"
+pulse_indev_deps="libpulse"
+pulse_outdev_deps="libpulse"
+sdl2_outdev_deps="sdl2"
+sndio_indev_deps="sndio"
+sndio_outdev_deps="sndio"
+v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
+v4l2_indev_suggest="libv4l2"
+v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
+v4l2_outdev_suggest="libv4l2"
+vfwcap_indev_deps="vfw32 vfwcap_defines"
+xcbgrab_indev_deps="libxcb"
+xcbgrab_indev_suggest="libxcb_shm libxcb_shape libxcb_xfixes"
+xv_outdev_deps="xlib_xv xlib_x11 xlib_xext"
+
+# protocols
+async_protocol_deps="threads"
+bluray_protocol_deps="libbluray"
+ffrtmpcrypt_protocol_conflict="librtmp_protocol"
+ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl mbedtls"
+ffrtmpcrypt_protocol_select="tcp_protocol"
+ffrtmphttp_protocol_conflict="librtmp_protocol"
+ffrtmphttp_protocol_select="http_protocol"
+ftp_protocol_select="tcp_protocol"
+gopher_protocol_select="tcp_protocol"
+gophers_protocol_select="tls_protocol"
+http_protocol_select="tcp_protocol"
+http_protocol_suggest="zlib"
+httpproxy_protocol_select="tcp_protocol"
+httpproxy_protocol_suggest="zlib"
+https_protocol_select="tls_protocol"
+https_protocol_suggest="zlib"
+icecast_protocol_select="http_protocol"
+mmsh_protocol_select="http_protocol"
+mmst_protocol_select="network"
+rtmp_protocol_conflict="librtmp_protocol"
+rtmp_protocol_select="tcp_protocol"
+rtmp_protocol_suggest="zlib"
+rtmpe_protocol_select="ffrtmpcrypt_protocol"
+rtmpe_protocol_suggest="zlib"
+rtmps_protocol_conflict="librtmp_protocol"
+rtmps_protocol_select="tls_protocol"
+rtmps_protocol_suggest="zlib"
+rtmpt_protocol_select="ffrtmphttp_protocol"
+rtmpt_protocol_suggest="zlib"
+rtmpte_protocol_select="ffrtmpcrypt_protocol ffrtmphttp_protocol"
+rtmpte_protocol_suggest="zlib"
+rtmpts_protocol_select="ffrtmphttp_protocol https_protocol"
+rtmpts_protocol_suggest="zlib"
+rtp_protocol_select="udp_protocol"
+schannel_conflict="openssl gnutls libtls mbedtls"
+sctp_protocol_deps="struct_sctp_event_subscribe struct_msghdr_msg_flags"
+sctp_protocol_select="network"
+securetransport_conflict="openssl gnutls libtls mbedtls"
+srtp_protocol_select="rtp_protocol srtp"
+tcp_protocol_select="network"
+tls_protocol_deps_any="gnutls openssl schannel securetransport libtls mbedtls"
+tls_protocol_select="tcp_protocol"
+udp_protocol_select="network"
+udplite_protocol_select="network"
+unix_protocol_deps="sys_un_h"
+unix_protocol_select="network"
+ipfs_gateway_protocol_select="https_protocol"
+ipns_gateway_protocol_select="https_protocol"
+
+# external library protocols
+libamqp_protocol_deps="librabbitmq"
+libamqp_protocol_select="network"
+librist_protocol_deps="librist"
+librist_protocol_select="network"
+librtmp_protocol_deps="librtmp"
+librtmpe_protocol_deps="librtmp"
+librtmps_protocol_deps="librtmp"
+librtmpt_protocol_deps="librtmp"
+librtmpte_protocol_deps="librtmp"
+libsmbclient_protocol_deps="libsmbclient gplv3"
+libsrt_protocol_deps="libsrt"
+libsrt_protocol_select="network"
+libssh_protocol_deps="libssh"
+libtls_conflict="openssl gnutls mbedtls"
+libzmq_protocol_deps="libzmq"
+libzmq_protocol_select="network"
+
+# filters
+ametadata_filter_deps="avformat"
+amovie_filter_deps="avcodec avformat"
+aresample_filter_deps="swresample"
+asr_filter_deps="pocketsphinx"
+ass_filter_deps="libass"
+avgblur_opencl_filter_deps="opencl"
+avgblur_vulkan_filter_deps="vulkan spirv_compiler"
+azmq_filter_deps="libzmq"
+blackframe_filter_deps="gpl"
+blend_vulkan_filter_deps="vulkan spirv_compiler"
+boxblur_filter_deps="gpl"
+boxblur_opencl_filter_deps="opencl gpl"
+bs2b_filter_deps="libbs2b"
+chromaber_vulkan_filter_deps="vulkan spirv_compiler"
+colorkey_opencl_filter_deps="opencl"
+colormatrix_filter_deps="gpl"
+convolution_opencl_filter_deps="opencl"
+coreimage_filter_deps="coreimage appkit"
+coreimage_filter_extralibs="-framework OpenGL"
+coreimagesrc_filter_deps="coreimage appkit"
+coreimagesrc_filter_extralibs="-framework OpenGL"
+cover_rect_filter_deps="avcodec avformat gpl"
+cropdetect_filter_deps="gpl"
+deinterlace_qsv_filter_deps="libmfx"
+deinterlace_qsv_filter_select="qsvvpp"
+deinterlace_vaapi_filter_deps="vaapi"
+delogo_filter_deps="gpl"
+denoise_vaapi_filter_deps="vaapi"
+derain_filter_select="dnn"
+deshake_filter_select="pixelutils"
+deshake_opencl_filter_deps="opencl"
+dilation_opencl_filter_deps="opencl"
+dnn_classify_filter_select="dnn"
+dnn_detect_filter_select="dnn"
+dnn_processing_filter_select="dnn"
+drawtext_filter_deps="libfreetype"
+drawtext_filter_suggest="libfontconfig libfribidi"
+elbg_filter_deps="avcodec"
+eq_filter_deps="gpl"
+erosion_opencl_filter_deps="opencl"
+find_rect_filter_deps="avcodec avformat gpl"
+flip_vulkan_filter_deps="vulkan spirv_compiler"
+flite_filter_deps="libflite threads"
+framerate_filter_select="scene_sad"
+freezedetect_filter_select="scene_sad"
+frei0r_deps_any="libdl LoadLibrary"
+frei0r_filter_deps="frei0r"
+frei0r_src_filter_deps="frei0r"
+fspp_filter_deps="gpl"
+gblur_vulkan_filter_deps="vulkan spirv_compiler"
+hflip_vulkan_filter_deps="vulkan spirv_compiler"
+histeq_filter_deps="gpl"
+hqdn3d_filter_deps="gpl"
+iccdetect_filter_deps="lcms2"
+iccgen_filter_deps="lcms2"
+interlace_filter_deps="gpl"
+kerndeint_filter_deps="gpl"
+ladspa_filter_deps="ladspa libdl"
+lensfun_filter_deps="liblensfun version3"
+libplacebo_filter_deps="libplacebo vulkan"
+lv2_filter_deps="lv2"
+mcdeint_filter_deps="avcodec gpl"
+metadata_filter_deps="avformat"
+movie_filter_deps="avcodec avformat"
+mpdecimate_filter_deps="gpl"
+mpdecimate_filter_select="pixelutils"
+minterpolate_filter_select="scene_sad"
+mptestsrc_filter_deps="gpl"
+negate_filter_deps="lut_filter"
+nlmeans_opencl_filter_deps="opencl"
+nnedi_filter_deps="gpl"
+ocr_filter_deps="libtesseract"
+ocv_filter_deps="libopencv"
+openclsrc_filter_deps="opencl"
+overlay_opencl_filter_deps="opencl"
+overlay_qsv_filter_deps="libmfx"
+overlay_qsv_filter_select="qsvvpp"
+overlay_vaapi_filter_deps="vaapi VAProcPipelineCaps_blend_flags"
+overlay_vulkan_filter_deps="vulkan spirv_compiler"
+owdenoise_filter_deps="gpl"
+pad_opencl_filter_deps="opencl"
+pan_filter_deps="swresample"
+perspective_filter_deps="gpl"
+phase_filter_deps="gpl"
+pp7_filter_deps="gpl"
+pp_filter_deps="gpl postproc"
+prewitt_opencl_filter_deps="opencl"
+procamp_vaapi_filter_deps="vaapi"
+program_opencl_filter_deps="opencl"
+pullup_filter_deps="gpl"
+remap_opencl_filter_deps="opencl"
+removelogo_filter_deps="avcodec avformat swscale"
+repeatfields_filter_deps="gpl"
+roberts_opencl_filter_deps="opencl"
+rubberband_filter_deps="librubberband"
+sab_filter_deps="gpl swscale"
+scale2ref_filter_deps="swscale"
+scale_filter_deps="swscale"
+scale_qsv_filter_deps="libmfx"
+scale_qsv_filter_select="qsvvpp"
+scdet_filter_select="scene_sad"
+select_filter_select="scene_sad"
+sharpness_vaapi_filter_deps="vaapi"
+showcqt_filter_deps="avformat swscale"
+showcqt_filter_suggest="libfontconfig libfreetype"
+signature_filter_deps="gpl avcodec avformat"
+smartblur_filter_deps="gpl swscale"
+sobel_opencl_filter_deps="opencl"
+sofalizer_filter_deps="libmysofa"
+spp_filter_deps="gpl avcodec"
+spp_filter_select="fft idctdsp fdctdsp me_cmp pixblockdsp"
+sr_filter_deps="avformat swscale"
+sr_filter_select="dnn"
+stereo3d_filter_deps="gpl"
+subtitles_filter_deps="avformat avcodec libass"
+super2xsai_filter_deps="gpl"
+pixfmts_super2xsai_test_deps="super2xsai_filter"
+tinterlace_filter_deps="gpl"
+tinterlace_merge_test_deps="tinterlace_filter"
+tinterlace_pad_test_deps="tinterlace_filter"
+tonemap_filter_deps="const_nan"
+tonemap_vaapi_filter_deps="vaapi VAProcFilterParameterBufferHDRToneMapping"
+tonemap_opencl_filter_deps="opencl const_nan"
+transpose_opencl_filter_deps="opencl"
+transpose_vaapi_filter_deps="vaapi VAProcPipelineCaps_rotation_flags"
+transpose_vulkan_filter_deps="vulkan spirv_compiler"
+unsharp_opencl_filter_deps="opencl"
+uspp_filter_deps="gpl avcodec"
+vaguedenoiser_filter_deps="gpl"
+vflip_vulkan_filter_deps="vulkan spirv_compiler"
+vidstabdetect_filter_deps="libvidstab"
+vidstabtransform_filter_deps="libvidstab"
+libvmaf_filter_deps="libvmaf"
+zmq_filter_deps="libzmq"
+zoompan_filter_deps="swscale"
+zscale_filter_deps="libzimg const_nan"
+scale_vaapi_filter_deps="vaapi"
+scale_vulkan_filter_deps="vulkan spirv_compiler"
+vpp_qsv_filter_deps="libmfx"
+vpp_qsv_filter_select="qsvvpp"
+xfade_opencl_filter_deps="opencl"
+yadif_cuda_filter_deps="ffnvcodec"
+yadif_cuda_filter_deps_any="cuda_nvcc cuda_llvm"
+yadif_videotoolbox_filter_deps="metal corevideo videotoolbox"
+hstack_vaapi_filter_deps="vaapi_1"
+vstack_vaapi_filter_deps="vaapi_1"
+xstack_vaapi_filter_deps="vaapi_1"
+hstack_qsv_filter_deps="libmfx"
+hstack_qsv_filter_select="qsvvpp"
+vstack_qsv_filter_deps="libmfx"
+vstack_qsv_filter_select="qsvvpp"
+xstack_qsv_filter_deps="libmfx"
+xstack_qsv_filter_select="qsvvpp"
+
+# examples
+avio_http_serve_files_deps="avformat avutil fork"
+avio_list_dir_deps="avformat avutil"
+avio_read_callback_deps="avformat avcodec avutil"
+decode_audio_example_deps="avcodec avutil"
+decode_filter_audio_example_deps="avfilter avcodec avformat avutil"
+decode_filter_video_example_deps="avfilter avcodec avformat avutil"
+decode_video_example_deps="avcodec avutil"
+demux_decode_example_deps="avcodec avformat avutil"
+encode_audio_example_deps="avcodec avutil"
+encode_video_example_deps="avcodec avutil"
+extract_mvs_example_deps="avcodec avformat avutil"
+filter_audio_example_deps="avfilter avutil"
+hw_decode_example_deps="avcodec avformat avutil"
+mux_example_deps="avcodec avformat avutil swscale"
+qsv_decode_example_deps="avcodec avutil libmfx h264_qsv_decoder"
+remux_example_deps="avcodec avformat avutil"
+resample_audio_example_deps="avutil swresample"
+scale_video_example_deps="avutil swscale"
+show_metadata_example_deps="avformat avutil"
+transcode_aac_example_deps="avcodec avformat swresample"
+transcode_example_deps="avfilter avcodec avformat avutil"
+vaapi_encode_example_deps="avcodec avutil h264_vaapi_encoder"
+vaapi_transcode_example_deps="avcodec avformat avutil h264_vaapi_encoder"
+qsv_transcode_example_deps="avcodec avformat avutil h264_qsv_encoder"
+
+# EXTRALIBS_LIST
+cpu_init_extralibs="pthreads_extralibs"
+cws2fws_extralibs="zlib_extralibs"
+
+# libraries, in any order
+avcodec_deps="avutil"
+avcodec_suggest="libm stdatomic"
+avdevice_deps="avformat avcodec avutil"
+avdevice_suggest="libm stdatomic"
+avfilter_deps="avutil"
+avfilter_suggest="libm stdatomic"
+avformat_deps="avcodec avutil"
+avformat_suggest="libm network zlib stdatomic"
+avutil_suggest="clock_gettime ffnvcodec libm libdrm libmfx opencl user32 vaapi vulkan videotoolbox corefoundation corevideo coremedia bcrypt stdatomic"
+postproc_deps="avutil gpl"
+postproc_suggest="libm stdatomic"
+swresample_deps="avutil"
+swresample_suggest="libm libsoxr stdatomic"
+swscale_deps="avutil"
+swscale_suggest="libm stdatomic"
+
+avcodec_extralibs="pthreads_extralibs iconv_extralibs dxva2_extralibs lcms2_extralibs"
+avfilter_extralibs="pthreads_extralibs"
+avutil_extralibs="d3d11va_extralibs nanosleep_extralibs pthreads_extralibs vaapi_drm_extralibs vaapi_x11_extralibs vdpau_x11_extralibs"
+
+# programs
+ffmpeg_deps="avcodec avfilter avformat threads"
+ffmpeg_select="aformat_filter anull_filter atrim_filter format_filter
+               hflip_filter null_filter
+               transpose_filter trim_filter vflip_filter"
+ffmpeg_suggest="ole32 psapi shell32"
+ffplay_deps="avcodec avformat swscale swresample sdl2"
+ffplay_select="rdft crop_filter transpose_filter hflip_filter vflip_filter rotate_filter"
+ffplay_suggest="shell32"
+ffprobe_deps="avcodec avformat"
+ffprobe_suggest="shell32"
+
+# documentation
+podpages_deps="perl"
+manpages_deps="perl pod2man"
+htmlpages_deps="perl"
+htmlpages_deps_any="makeinfo_html texi2html"
+txtpages_deps="perl makeinfo"
+doc_deps_any="manpages htmlpages podpages txtpages"
+
+# default parameters
+
+logfile="ffbuild/config.log"
+
+# installation paths
+prefix_default="/usr/local"
+bindir_default='${prefix}/bin'
+datadir_default='${prefix}/share/ffmpeg'
+docdir_default='${prefix}/share/doc/ffmpeg'
+incdir_default='${prefix}/include'
+libdir_default='${prefix}/lib'
+mandir_default='${prefix}/share/man'
+
+# toolchain
+ar_default="ar"
+cc_default="gcc"
+cxx_default="g++"
+host_cc_default="gcc"
+doxygen_default="doxygen"
+install="install"
+ln_s_default="ln -s -f"
+metalcc_default="xcrun -sdk macosx metal"
+metallib_default="xcrun -sdk macosx metallib"
+nm_default="nm -g"
+pkg_config_default=pkg-config
+ranlib_default="ranlib"
+strip_default="strip"
+version_script='--version-script'
+objformat="elf32"
+x86asmexe_default="nasm"
+windres_default="windres"
+striptype="direct"
+
+# OS
+target_os_default=$(tolower $(uname -s))
+host_os=$target_os_default
+
+# machine
+if test "$target_os_default" = aix; then
+    arch_default=$(uname -p)
+    strip_default="strip -X32_64"
+    nm_default="nm -g -X32_64"
+else
+    arch_default=$(uname -m)
+fi
+cpu="generic"
+intrinsics="none"
+
+# configurable options
+enable $PROGRAM_LIST
+enable $DOCUMENT_LIST
+enable $EXAMPLE_LIST
+enable $LIBRARY_LIST
+enable stripping
+
+enable asm
+enable debug
+enable doc
+enable faan faandct faanidct
+enable large_tests
+enable optimizations
+enable ptx_compression
+enable runtime_cpudetect
+enable safe_bitstream_reader
+enable static
+enable swscale_alpha
+enable valgrind_backtrace
+
+sws_max_filter_size_default=256
+set_default sws_max_filter_size
+
+# internal components are enabled by default
+enable $EXTRALIBS_LIST
+
+# Avoid external, non-system, libraries getting enabled by dependency resolution
+disable $EXTERNAL_LIBRARY_LIST $HWACCEL_LIBRARY_LIST
+
+# build settings
+SHFLAGS='-shared -Wl,-soname,$$(@F)'
+LIBPREF="lib"
+LIBSUF=".a"
+FULLNAME='$(NAME)$(BUILDSUF)'
+LIBNAME='$(LIBPREF)$(FULLNAME)$(LIBSUF)'
+SLIBPREF="lib"
+SLIBSUF=".so"
+SLIBNAME='$(SLIBPREF)$(FULLNAME)$(SLIBSUF)'
+SLIBNAME_WITH_VERSION='$(SLIBNAME).$(LIBVERSION)'
+SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
+LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
+SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
+SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
+VERSION_SCRIPT_POSTPROCESS_CMD="cat"
+
+asflags_filter=echo
+cflags_filter=echo
+ldflags_filter=echo
+
+AS_C='-c'
+AS_O='-o $@'
+CC_C='-c'
+CC_E='-E -o $@'
+CC_O='-o $@'
+CXX_C='-c'
+CXX_O='-o $@'
+OBJCC_C='-c'
+OBJCC_E='-E -o $@'
+OBJCC_O='-o $@'
+X86ASM_O='-o $@'
+LD_O='-o $@'
+LD_LIB='-l%'
+LD_PATH='-L'
+HOSTCC_C='-c'
+HOSTCC_E='-E -o $@'
+HOSTCC_O='-o $@'
+HOSTLD_O='-o $@'
+NVCC_C='-c'
+NVCC_O='-o $@'
+
+host_extralibs='-lm'
+host_cflags_filter=echo
+host_ldflags_filter=echo
+
+target_path='$(CURDIR)'
+
+# since the object filename is not given with the -MM flag, the compiler
+# is only able to print the basename, and we must add the path ourselves
+DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(@F),$(@D)/$(@F)," > $(@:.o=.d)'
+DEPFLAGS='-MM'
+
+mkdir -p ffbuild
+
+# find source path
+if test -f configure; then
+    source_path=.
+elif test -f src/configure; then
+    source_path=src
+else
+    source_path=$(cd $(dirname "$0"); pwd)
+    case "$source_path" in
+        *[[:blank:]]*) die "Out of tree builds are impossible with whitespace in source path." ;;
+    esac
+    test -e "$source_path/config.h" &&
+        die "Out of tree builds are impossible with config.h in source dir."
+fi
+
+for v in "$@"; do
+    r=${v#*=}
+    l=${v%"$r"}
+    r=$(sh_quote "$r")
+    FFMPEG_CONFIGURATION="${FFMPEG_CONFIGURATION# } ${l}${r}"
+done
+
+find_things_extern(){
+    thing=$1
+    pattern=$2
+    file=$source_path/$3
+    out=${4:-$thing}
+    sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$out/p" "$file"
+}
+
+find_filters_extern(){
+    file=$source_path/$1
+    sed -n 's/^extern const AVFilter ff_[avfsinkrc]\{2,5\}_\([[:alnum:]_]\{1,\}\);/\1_filter/p' $file
+}
+
+FILTER_LIST=$(find_filters_extern libavfilter/allfilters.c)
+OUTDEV_LIST=$(find_things_extern muxer FFOutputFormat libavdevice/alldevices.c outdev)
+INDEV_LIST=$(find_things_extern demuxer AVInputFormat libavdevice/alldevices.c indev)
+MUXER_LIST=$(find_things_extern muxer FFOutputFormat libavformat/allformats.c)
+DEMUXER_LIST=$(find_things_extern demuxer AVInputFormat libavformat/allformats.c)
+ENCODER_LIST=$(find_things_extern encoder FFCodec libavcodec/allcodecs.c)
+DECODER_LIST=$(find_things_extern decoder FFCodec libavcodec/allcodecs.c)
+CODEC_LIST="
+    $ENCODER_LIST
+    $DECODER_LIST
+"
+PARSER_LIST=$(find_things_extern parser AVCodecParser libavcodec/parsers.c)
+BSF_LIST=$(find_things_extern bsf FFBitStreamFilter libavcodec/bitstream_filters.c)
+HWACCEL_LIST=$(find_things_extern hwaccel AVHWAccel libavcodec/hwaccels.h)
+PROTOCOL_LIST=$(find_things_extern protocol URLProtocol libavformat/protocols.c)
+
+AVCODEC_COMPONENTS_LIST="
+    $BSF_LIST
+    $DECODER_LIST
+    $ENCODER_LIST
+    $HWACCEL_LIST
+    $PARSER_LIST
+"
+
+AVDEVICE_COMPONENTS_LIST="
+    $INDEV_LIST
+    $OUTDEV_LIST
+"
+
+AVFILTER_COMPONENTS_LIST="
+    $FILTER_LIST
+"
+
+AVFORMAT_COMPONENTS_LIST="
+    $DEMUXER_LIST
+    $MUXER_LIST
+    $PROTOCOL_LIST
+"
+
+ALL_COMPONENTS="
+    $AVCODEC_COMPONENTS_LIST
+    $AVDEVICE_COMPONENTS_LIST
+    $AVFILTER_COMPONENTS_LIST
+    $AVFORMAT_COMPONENTS_LIST
+"
+
+for n in $COMPONENT_LIST; do
+    v=$(toupper ${n%s})_LIST
+    eval enable \$$v
+    eval ${n}_if_any="\$$v"
+done
+
+enable $ARCH_EXT_LIST
+
+die_unknown(){
+    echo "Unknown option \"$1\"."
+    echo "See $0 --help for available options."
+    exit 1
+}
+
+print_in_columns() {
+    tr ' ' '\n' | sort | tr '\r\n' '  ' | awk -v col_width=24 -v width="$ncols" '
+    {
+        num_cols = width > col_width ? int(width / col_width) : 1;
+        num_rows = int((NF + num_cols-1) / num_cols);
+        y = x = 1;
+        for (y = 1; y <= num_rows; y++) {
+            i = y;
+            for (x = 1; x <= num_cols; x++) {
+                if (i <= NF) {
+                  line = sprintf("%s%-" col_width "s", line, $i);
+                }
+                i = i + num_rows;
+            }
+            print line; line = "";
+        }
+    }' | sed 's/ *$//'
+}
+
+show_list() {
+    suffix=_$1
+    shift
+    echo $* | sed s/$suffix//g | print_in_columns
+    exit 0
+}
+
+rand_list(){
+    IFS=', '
+    set -- $*
+    unset IFS
+    for thing; do
+        comp=${thing%:*}
+        prob=${thing#$comp}
+        prob=${prob#:}
+        is_in ${comp} $COMPONENT_LIST && eval comp=\$$(toupper ${comp%s})_LIST
+        echo "prob ${prob:-0.5}"
+        printf '%s\n' $comp
+    done
+}
+
+do_random(){
+    action=$1
+    shift
+    random_seed=$(awk "BEGIN { srand($random_seed); print srand() }")
+    $action $(rand_list "$@" | awk "BEGIN { srand($random_seed) } \$1 == \"prob\" { prob = \$2; next } rand() < prob { print }")
+}
+
+for opt do
+    optval="${opt#*=}"
+    case "$opt" in
+        --extra-ldflags=*)
+            add_ldflags $optval
+        ;;
+        --extra-ldexeflags=*)
+            add_ldexeflags $optval
+        ;;
+        --extra-ldsoflags=*)
+            add_ldsoflags $optval
+        ;;
+        --extra-ldlibflags=*)
+            warn "The --extra-ldlibflags option is only provided for compatibility and will be\n"\
+                 "removed in the future. Use --extra-ldsoflags instead."
+            add_ldsoflags $optval
+        ;;
+        --extra-libs=*)
+            add_extralibs $optval
+        ;;
+        --disable-devices)
+            disable $INDEV_LIST $OUTDEV_LIST
+        ;;
+        --enable-debug=*)
+            debuglevel="$optval"
+        ;;
+        --disable-programs)
+            disable $PROGRAM_LIST
+        ;;
+        --disable-everything)
+            map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
+        ;;
+        --disable-all)
+            map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
+            disable $LIBRARY_LIST $PROGRAM_LIST doc
+            enable avutil
+        ;;
+        --enable-random|--disable-random)
+            action=${opt%%-random}
+            do_random ${action#--} $COMPONENT_LIST
+        ;;
+        --enable-random=*|--disable-random=*)
+            action=${opt%%-random=*}
+            do_random ${action#--} $optval
+        ;;
+        --enable-sdl)
+            enable sdl2
+        ;;
+        --enable-*=*|--disable-*=*)
+            eval $(echo "${opt%%=*}" | sed 's/--/action=/;s/-/ thing=/')
+            is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
+            eval list=\$$(toupper $thing)_LIST
+            name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
+            list=$(filter "$name" $list)
+            [ "$list" = "" ] && warn "Option $opt did not match anything"
+            test $action = enable && warn_if_gets_disabled $list
+            $action $list
+        ;;
+        --enable-yasm|--disable-yasm)
+            warn "The ${opt} option is only provided for compatibility and will be\n"\
+                 "removed in the future. Use --enable-x86asm / --disable-x86asm instead."
+            test $opt = --enable-yasm && x86asm=yes || x86asm=no
+        ;;
+        --yasmexe=*)
+            warn "The --yasmexe option is only provided for compatibility and will be\n"\
+                 "removed in the future. Use --x86asmexe instead."
+            x86asmexe="$optval"
+        ;;
+        --enable-?*|--disable-?*)
+            eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
+            if is_in $option $COMPONENT_LIST; then
+                test $action = disable && action=unset
+                eval $action \$$(toupper ${option%s})_LIST
+            elif is_in $option $CMDLINE_SELECT; then
+                $action $option
+            else
+                die_unknown $opt
+            fi
+        ;;
+        --list-*)
+            NAME="${opt#--list-}"
+            is_in $NAME $COMPONENT_LIST || die_unknown $opt
+            NAME=${NAME%s}
+            eval show_list $NAME \$$(toupper $NAME)_LIST
+        ;;
+        --help|-h) show_help
+        ;;
+        --quiet|-q) quiet=yes
+        ;;
+        --fatal-warnings) enable fatal_warnings
+        ;;
+        --libfuzzer=*)
+            libfuzzer_path="$optval"
+        ;;
+        *)
+            optname="${opt%%=*}"
+            optname="${optname#--}"
+            optname=$(echo "$optname" | sed 's/-/_/g')
+            if is_in $optname $CMDLINE_SET; then
+                eval $optname='$optval'
+            elif is_in $optname $CMDLINE_APPEND; then
+                append $optname "$optval"
+            else
+                die_unknown $opt
+            fi
+        ;;
+    esac
+done
+
+for e in $env; do
+    eval "export $e"
+done
+
+if disabled autodetect; then
+
+    # Unless iconv is explicitely disabled by the user, we still want to probe
+    # for the iconv from the libc.
+    disabled iconv || enable libc_iconv
+
+    disable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
+    disable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
+fi
+# Mark specifically enabled, but normally autodetected libraries as requested.
+for lib in $AUTODETECT_LIBS; do
+    enabled $lib && request $lib
+done
+#TODO: switch to $AUTODETECT_LIBS when $THREADS_LIST is supported the same way
+enable_weak $EXTERNAL_AUTODETECT_LIBRARY_LIST
+enable_weak $HWACCEL_AUTODETECT_LIBRARY_LIST
+
+disabled logging && logfile=/dev/null
+
+# command line configuration sanity checks
+
+# we need to build at least one lib type
+if ! enabled_any static shared; then
+    cat <<EOF
+At least one library type must be built.
+Specify --enable-static to build the static libraries or --enable-shared to
+build the shared libraries as well. To only build the shared libraries specify
+--disable-static in addition to --enable-shared.
+EOF
+    exit 1
+fi
+
+die_license_disabled() {
+    enabled $1 || { enabled $v && die "$v is $1 and --enable-$1 is not specified."; }
+}
+
+die_license_disabled_gpl() {
+    enabled $1 || { enabled $v && die "$v is incompatible with the gpl and --enable-$1 is not specified."; }
+}
+
+map "die_license_disabled gpl"      $EXTERNAL_LIBRARY_GPL_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
+map "die_license_disabled version3" $EXTERNAL_LIBRARY_VERSION3_LIST $EXTERNAL_LIBRARY_GPLV3_LIST
+
+enabled gpl && map "die_license_disabled_gpl nonfree" $EXTERNAL_LIBRARY_NONFREE_LIST
+map "die_license_disabled nonfree" $HWACCEL_LIBRARY_NONFREE_LIST
+
+enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }
+
+if enabled nonfree; then
+    license="nonfree and unredistributable"
+elif enabled gplv3; then
+    license="GPL version 3 or later"
+elif enabled lgplv3; then
+    license="LGPL version 3 or later"
+elif enabled gpl; then
+    license="GPL version 2 or later"
+else
+    license="LGPL version 2.1 or later"
+fi
+
+enabled_all gnutls openssl &&
+    die "GnuTLS and OpenSSL must not be enabled at the same time."
+
+enabled_all gnutls mbedtls &&
+    die "GnuTLS and mbedTLS must not be enabled at the same time."
+
+enabled_all openssl mbedtls &&
+    die "OpenSSL and mbedTLS must not be enabled at the same time."
+
+# Disable all the library-specific components if the library itself
+# is disabled, see AVCODEC_LIST and following _LIST variables.
+
+disable_components(){
+    disabled ${1} && disable $(
+        eval components="\$$(toupper ${1})_COMPONENTS"
+        map 'eval echo \${$(toupper ${v%s})_LIST}' $components
+    )
+}
+
+map 'disable_components $v' $LIBRARY_LIST
+
+echo "# $0 $FFMPEG_CONFIGURATION" > $logfile
+set >> $logfile
+
+test -n "$valgrind" && toolchain="valgrind-memcheck"
+
+enabled ossfuzz && ! echo $CFLAGS | grep -q -- "-fsanitize="  && ! echo $CFLAGS | grep -q -- "-fcoverage-mapping" &&{
+    add_cflags  -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp -fno-omit-frame-pointer
+    add_ldflags -fsanitize=address,undefined -fsanitize-coverage=trace-pc-guard,trace-cmp
+}
+
+case "$toolchain" in
+    *-asan)
+        cc_default="${toolchain%-asan}"
+        add_cflags  -fsanitize=address
+        add_ldflags -fsanitize=address
+    ;;
+    *-lsan)
+        cc_default="${toolchain%-lsan}"
+        add_cflags  -fsanitize=leak
+        add_ldflags -fsanitize=leak
+    ;;
+    *-msan)
+        cc_default="${toolchain%-msan}"
+        add_cflags  -fsanitize=memory -fsanitize-memory-track-origins
+        add_ldflags -fsanitize=memory
+    ;;
+    *-tsan)
+        cc_default="${toolchain%-tsan}"
+        add_cflags  -fsanitize=thread
+        add_ldflags -fsanitize=thread
+        case "$toolchain" in
+            gcc-tsan)
+                add_cflags  -fPIC
+                add_ldflags -fPIC
+                ;;
+        esac
+    ;;
+    *-usan)
+        cc_default="${toolchain%-usan}"
+        add_cflags  -fsanitize=undefined
+        add_ldflags -fsanitize=undefined
+    ;;
+    valgrind-*)
+        target_exec_default="valgrind"
+        case "$toolchain" in
+            valgrind-massif)
+                target_exec_args="--tool=massif --alloc-fn=av_malloc --alloc-fn=av_mallocz --alloc-fn=av_calloc --alloc-fn=av_fast_padded_malloc --alloc-fn=av_fast_malloc --alloc-fn=av_realloc_f --alloc-fn=av_fast_realloc --alloc-fn=av_realloc"
+                ;;
+            valgrind-memcheck)
+                target_exec_args="--error-exitcode=1 --malloc-fill=0x2a --track-origins=yes --leak-check=full --gen-suppressions=all --suppressions=$source_path/tests/fate-valgrind.supp"
+                ;;
+        esac
+    ;;
+    msvc)
+        cl_major_ver=$(cl.exe 2>&1 | sed -n 's/.*Version \([[:digit:]]\{1,\}\)\..*/\1/p')
+        if [ -z "$cl_major_ver" ] || [ $cl_major_ver -ge 18 ]; then
+            cc_default="cl.exe"
+            cxx_default="cl.exe"
+        else
+            die "Unsupported MSVC version (2013 or newer required)"
+        fi
+        ld_default="$source_path/compat/windows/mslink"
+        windres_default="$source_path/compat/windows/mswindres"
+        nm_default="dumpbin.exe -symbols"
+        ar_default="lib.exe"
+        case "${arch:-$arch_default}" in
+        aarch64|arm64)
+            as_default="armasm64.exe"
+            ;;
+        arm*)
+            as_default="armasm.exe"
+            ;;
+        esac
+        target_os_default="win32"
+        # Use a relative path for TMPDIR. This makes sure all the
+        # ffconf temp files are written with a relative path, avoiding
+        # issues with msys/win32 path conversion for MSVC parameters
+        # such as -Fo<file> or -out:<file>.
+        TMPDIR=.
+    ;;
+    icl)
+        cc_default="icl"
+        ld_default="xilink"
+        nm_default="dumpbin -symbols"
+        ar_default="xilib"
+        target_os_default="win32"
+        TMPDIR=.
+    ;;
+    gcov)
+        add_cflags  -fprofile-arcs -ftest-coverage
+        add_ldflags -fprofile-arcs -ftest-coverage
+    ;;
+    llvm-cov)
+        add_cflags -fprofile-arcs -ftest-coverage
+        add_ldflags --coverage
+    ;;
+    hardened)
+        add_cppflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
+        add_cflags   -fno-strict-overflow -fstack-protector-all
+        add_ldflags  -Wl,-z,relro -Wl,-z,now
+        add_cflags   -fPIE
+        add_ldexeflags -fPIE -pie
+    ;;
+    ?*)
+        die "Unknown toolchain $toolchain"
+    ;;
+esac
+
+if test -n "$cross_prefix"; then
+    test -n "$arch" && test -n "$target_os" ||
+        die "Must specify target arch (--arch) and OS (--target-os) when cross-compiling"
+    enable cross_compile
+fi
+
+set_default target_os
+if test "$target_os" = android; then
+    cc_default="clang"
+fi
+
+ar_default="${cross_prefix}${ar_default}"
+cc_default="${cross_prefix}${cc_default}"
+cxx_default="${cross_prefix}${cxx_default}"
+nm_default="${cross_prefix}${nm_default}"
+pkg_config_default="${cross_prefix}${pkg_config_default}"
+ranlib_default="${cross_prefix}${ranlib_default}"
+strip_default="${cross_prefix}${strip_default}"
+windres_default="${cross_prefix}${windres_default}"
+
+sysinclude_default="${sysroot}/usr/include"
+
+if enabled cuda_sdk; then
+    warn "Option --enable-cuda-sdk is deprecated. Use --enable-cuda-nvcc instead."
+    enable cuda_nvcc
+fi
+
+if enabled cuda_nvcc; then
+    nvcc_default="nvcc"
+    nvccflags_default="-gencode arch=compute_30,code=sm_30 -O2"
+else
+    nvcc_default="clang"
+    nvccflags_default="--cuda-gpu-arch=sm_30 -O2"
+    NVCC_C=""
+fi
+
+set_default nvcc
+
+if enabled cuda_nvcc; then
+    if $nvcc $nvccflags_default 2>&1 | grep -qi unsupported; then
+        nvccflags_default="-gencode arch=compute_60,code=sm_60 -O2"
+    fi
+fi
+
+set_default arch cc cxx doxygen pkg_config ranlib strip sysinclude \
+    target_exec x86asmexe metalcc metallib
+enabled cross_compile || host_cc_default=$cc
+set_default host_cc
+
+if ${ranlib} 2>&1 | grep -q "\-D "; then
+    ranlib="${ranlib} -D"
+fi
+
+pkg_config_fail_message=""
+if ! $pkg_config --version >/dev/null 2>&1; then
+    warn "$pkg_config not found, library detection may fail."
+    pkg_config=false
+elif is_in -static $cc $LDFLAGS && ! is_in --static $pkg_config $pkg_config_flags; then
+    pkg_config_fail_message="
+Note: When building a static binary, add --pkg-config-flags=\"--static\"."
+fi
+
+if test $doxygen != $doxygen_default && \
+  ! $doxygen --version >/dev/null 2>&1; then
+    warn "Specified doxygen \"$doxygen\" not found, API documentation will fail to build."
+fi
+
+exesuf() {
+    case $1 in
+        mingw32*|mingw64*|msys*|win32|win64|cygwin*|*-dos|freedos|opendos|os/2*|symbian) echo .exe ;;
+    esac
+}
+
+EXESUF=$(exesuf $target_os)
+HOSTEXESUF=$(exesuf $host_os)
+
+# set temporary file name
+: ${TMPDIR:=$TEMPDIR}
+: ${TMPDIR:=$TMP}
+: ${TMPDIR:=/tmp}
+
+if [ -n "$tempprefix" ] ; then
+    mktemp(){
+        tmpname="$tempprefix.${HOSTNAME}.${UID}"
+        echo "$tmpname"
+        mkdir "$tmpname"
+    }
+elif ! test_cmd mktemp -u XXXXXX; then
+    # simple replacement for missing mktemp
+    # NOT SAFE FOR GENERAL USE
+    mktemp(){
+        tmpname="${2%%XXX*}.${HOSTNAME}.${UID}.$$"
+        echo "$tmpname"
+        mkdir "$tmpname"
+    }
+fi
+
+FFTMPDIR=$(mktemp -d "${TMPDIR}/ffconf.XXXXXXXX" 2> /dev/null) ||
+    die "Unable to create temporary directory in $TMPDIR."
+
+tmpfile(){
+    tmp="${FFTMPDIR}/test"$2
+    (set -C; exec > $tmp) 2> /dev/null ||
+        die "Unable to create temporary file in $FFTMPDIR."
+    eval $1=$tmp
+}
+
+trap 'rm -rf -- "$FFTMPDIR"' EXIT
+trap 'exit 2' INT
+
+tmpfile TMPASM .asm
+tmpfile TMPC   .c
+tmpfile TMPCPP .cpp
+tmpfile TMPE   $EXESUF
+tmpfile TMPH   .h
+tmpfile TMPM   .m
+tmpfile TMPCU  .cu
+tmpfile TMPO   .o
+tmpfile TMPS   .S
+tmpfile TMPSH  .sh
+tmpfile TMPV   .ver
+
+unset -f mktemp
+
+chmod +x $TMPE
+
+# make sure we can execute files in $TMPDIR
+cat > $TMPSH 2>> $logfile <<EOF
+#! /bin/sh
+EOF
+chmod +x $TMPSH >> $logfile 2>&1
+if ! $TMPSH >> $logfile 2>&1; then
+    cat <<EOF
+Unable to create and execute files in $TMPDIR.  Set the TMPDIR environment
+variable to another directory and make sure that it is not mounted noexec.
+EOF
+    die "Sanity test failed."
+fi
+
+armasm_flags(){
+    for flag; do
+        case $flag in
+            # Filter out MSVC cl.exe options from cflags that shouldn't
+            # be passed to gas-preprocessor
+            -M[TD]*)                                            ;;
+            *)                  echo $flag                      ;;
+        esac
+   done
+}
+
+cparser_flags(){
+    for flag; do
+        case $flag in
+            -Wno-switch)             echo -Wno-switch-enum ;;
+            -Wno-format-zero-length) ;;
+            -Wdisabled-optimization) ;;
+            -Wno-pointer-sign)       echo -Wno-other ;;
+            *)                       echo $flag ;;
+        esac
+    done
+}
+
+msvc_common_flags(){
+    for flag; do
+        case $flag in
+            # In addition to specifying certain flags under the compiler
+            # specific filters, they must be specified here as well or else the
+            # generic catch all at the bottom will print the original flag.
+            -Wall)                ;;
+            -Wextra)              ;;
+            -std=c*)              ;;
+            # Common flags
+            -fomit-frame-pointer) ;;
+            -g)                   echo -Z7 ;;
+            -fno-math-errno)      ;;
+            -fno-common)          ;;
+            -fno-signed-zeros)    ;;
+            -fPIC)                ;;
+            -mthumb)              ;;
+            -march=*)             ;;
+            -lz)                  echo zlib.lib ;;
+            -lx264)               echo libx264.lib ;;
+            -lstdc++)             ;;
+            -l*)                  echo ${flag#-l}.lib ;;
+            -LARGEADDRESSAWARE)   echo $flag ;;
+            -L*)                  echo -libpath:${flag#-L} ;;
+            -Wl,*)                ;;
+            *)                    echo $flag ;;
+        esac
+    done
+}
+
+msvc_flags(){
+    msvc_common_flags "$@"
+    for flag; do
+        case $flag in
+            -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
+                                       -wd4554 ;;
+            -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
+                                       -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
+                                       -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
+                                       -wd4307 \
+                                       -wd4273 -wd4554 -wd4701 -wd4703 ;;
+        esac
+    done
+}
+
+icl_flags(){
+    msvc_common_flags "$@"
+    for flag; do
+        case $flag in
+            # Despite what Intel's documentation says -Wall, which is supported
+            # on Windows, does enable remarks so disable them here.
+            -Wall)                echo $flag -Qdiag-disable:remark ;;
+            -std=c99)             echo -Qstd=c99 ;;
+            -flto)                echo -ipo ;;
+        esac
+    done
+}
+
+icc_flags(){
+    for flag; do
+        case $flag in
+            -flto)                echo -ipo ;;
+            *)                    echo $flag ;;
+        esac
+    done
+}
+
+suncc_flags(){
+    for flag; do
+        case $flag in
+            -march=*|-mcpu=*)
+                case "${flag#*=}" in
+                    native)                   echo -xtarget=native       ;;
+                    v9|niagara)               echo -xarch=sparc          ;;
+                    ultrasparc)               echo -xarch=sparcvis       ;;
+                    ultrasparc3|niagara2)     echo -xarch=sparcvis2      ;;
+                    i586|pentium)             echo -xchip=pentium        ;;
+                    i686|pentiumpro|pentium2) echo -xtarget=pentium_pro  ;;
+                    pentium3*|c3-2)           echo -xtarget=pentium3     ;;
+                    pentium-m)          echo -xarch=sse2 -xchip=pentium3 ;;
+                    pentium4*)          echo -xtarget=pentium4           ;;
+                    prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
+                    *-sse3)             echo -xarch=sse3                 ;;
+                    core2)              echo -xarch=ssse3 -xchip=core2   ;;
+                    bonnell)                   echo -xarch=ssse3         ;;
+                    corei7|nehalem)            echo -xtarget=nehalem     ;;
+                    westmere)                  echo -xtarget=westmere    ;;
+                    silvermont)                echo -xarch=sse4_2        ;;
+                    corei7-avx|sandybridge)    echo -xtarget=sandybridge ;;
+                    core-avx*|ivybridge|haswell|broadwell|skylake*|knl)
+                                               echo -xarch=avx           ;;
+                    amdfam10|barcelona)        echo -xtarget=barcelona   ;;
+                    btver1)                    echo -xarch=amdsse4a      ;;
+                    btver2|bdver*|znver*)      echo -xarch=avx           ;;
+                    athlon-4|athlon-[mx]p)     echo -xarch=ssea          ;;
+                    k8|opteron|athlon64|athlon-fx)
+                                               echo -xarch=sse2a         ;;
+                    athlon*)                   echo -xarch=pentium_proa  ;;
+                esac
+                ;;
+            -std=c99)             echo -xc99              ;;
+            -fomit-frame-pointer) echo -xregs=frameptr    ;;
+            -fPIC)                echo -KPIC -xcode=pic32 ;;
+            -W*,*)                echo $flag              ;;
+            -f*-*|-W*|-mimpure-text)                      ;;
+            -shared)              echo -G                 ;;
+            *)                    echo $flag              ;;
+        esac
+    done
+}
+
+probe_cc(){
+    pfx=$1
+    _cc=$2
+    first=$3
+
+    unset _type _ident _cc_c _cc_e _cc_o _flags _cflags
+    unset _ld_o _ldflags _ld_lib _ld_path
+    unset _depflags _DEPCMD _DEPFLAGS
+    _flags_filter=echo
+
+    if $_cc --version 2>&1 | grep -q '^GNU assembler'; then
+        true # no-op to avoid reading stdin in following checks
+    elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
+        _type=llvm_gcc
+        gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
+        _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
+        _depflags='-MMD -MF $(@:.o=.d) -MT $@'
+        _cflags_speed='-O3'
+        _cflags_size='-Os'
+    elif $_cc -v 2>&1 | grep -qi ^gcc; then
+        _type=gcc
+        gcc_version=$($_cc --version | head -n1)
+        gcc_basever=$($_cc -dumpversion)
+        gcc_pkg_ver=$(expr "$gcc_version" : '[^ ]* \(([^)]*)\)')
+        gcc_ext_ver=$(expr "$gcc_version" : ".*$gcc_pkg_ver $gcc_basever \\(.*\\)")
+        _ident=$(cleanws "gcc $gcc_basever $gcc_pkg_ver $gcc_ext_ver")
+        case $gcc_basever in
+            2) ;;
+            2.*) ;;
+            *) _depflags='-MMD -MF $(@:.o=.d) -MT $@' ;;
+        esac
+        if [ "$first" = true ]; then
+            case $gcc_basever in
+                4.2*)
+                warn "gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler." ;;
+            esac
+        fi
+        _cflags_speed='-O3'
+        _cflags_size='-Os'
+    elif $_cc --version 2>/dev/null | grep -q ^icc; then
+        _type=icc
+        _ident=$($_cc --version | head -n1)
+        _depflags='-MMD'
+        _cflags_speed='-O3'
+        _cflags_size='-Os'
+        _cflags_noopt='-O1'
+        _flags_filter=icc_flags
+    elif $_cc -v 2>&1 | grep -q xlc; then
+        _type=xlc
+        _ident=$($_cc -qversion 2>/dev/null | head -n1)
+        _cflags_speed='-O5'
+        _cflags_size='-O5 -qcompact'
+    elif $_cc --vsn 2>/dev/null | grep -Eq "ARM (C/C\+\+ )?Compiler"; then
+        test -d "$sysroot" || die "No valid sysroot specified."
+        _type=armcc
+        _ident=$($_cc --vsn | grep -i build | head -n1 | sed 's/.*: //')
+        armcc_conf="$PWD/armcc.conf"
+        $_cc --arm_linux_configure                 \
+             --arm_linux_config_file="$armcc_conf" \
+             --configure_sysroot="$sysroot"        \
+             --configure_cpp_headers="$sysinclude" >>$logfile 2>&1 ||
+             die "Error creating armcc configuration file."
+        $_cc --vsn | grep -q RVCT && armcc_opt=rvct || armcc_opt=armcc
+        _flags="--arm_linux_config_file=$armcc_conf --translate_gcc"
+        as_default="${cross_prefix}gcc"
+        _depflags='-MMD'
+        _cflags_speed='-O3'
+        _cflags_size='-Os'
+    elif $_cc -v 2>&1 | grep -q clang && ! $_cc -? > /dev/null 2>&1; then
+        _type=clang
+        _ident=$($_cc --version 2>/dev/null | head -n1)
+        _depflags='-MMD -MF $(@:.o=.d) -MT $@'
+        _cflags_speed='-O3'
+        _cflags_size='-Oz'
+    elif $_cc -V 2>&1 | grep -q Sun; then
+        _type=suncc
+        _ident=$($_cc -V 2>&1 | head -n1 | cut -d' ' -f 2-)
+        _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "1s,^.*: ,$@: ," -e "\$$!s,\$$, \\\," -e "1!s,^.*: , ," > $(@:.o=.d)'
+        _DEPFLAGS='-xM1 -xc99'
+        _ldflags='-std=c99'
+        _cflags_speed='-O5'
+        _cflags_size='-O5 -xspace'
+        _flags_filter=suncc_flags
+    elif $_cc -v 2>&1 | grep -q 'PathScale\|Path64'; then
+        _type=pathscale
+        _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
+        _depflags='-MMD -MF $(@:.o=.d) -MT $@'
+        _cflags_speed='-O2'
+        _cflags_size='-Os'
+        _flags_filter='filter_out -Wdisabled-optimization'
+    elif $_cc -v 2>&1 | grep -q Open64; then
+        _type=open64
+        _ident=$($_cc -v 2>&1 | head -n1 | tr -d :)
+        _depflags='-MMD -MF $(@:.o=.d) -MT $@'
+        _cflags_speed='-O2'
+        _cflags_size='-Os'
+        _flags_filter='filter_out -Wdisabled-optimization|-Wtype-limits|-fno-signed-zeros'
+    elif $_cc 2>&1 | grep -q 'Microsoft.*ARM.*Assembler'; then
+        _type=armasm
+        _ident=$($_cc | head -n1)
+        # 4509: "This form of conditional instruction is deprecated"
+        _flags="-nologo -ignore 4509"
+        _flags_filter=armasm_flags
+    elif $_cc 2>&1 | grep -q Intel; then
+        _type=icl
+        _ident=$($_cc 2>&1 | head -n1)
+        _depflags='-QMMD -QMF$(@:.o=.d) -QMT$@'
+        # Not only is O3 broken on 13.x+ but it is slower on all previous
+        # versions (tested) as well.
+        _cflags_speed="-O2"
+        _cflags_size="-O1 -Oi" # -O1 without -Oi miscompiles stuff
+        if $_cc 2>&1 | grep -q Linker; then
+            _ld_o='-out:$@'
+        else
+            _ld_o='-Fe$@'
+        fi
+        _cc_o='-Fo$@'
+        _cc_e='-P'
+        _flags_filter=icl_flags
+        _ld_lib='lib%.a'
+        _ld_path='-libpath:'
+        # -Qdiag-error to make icl error when seeing certain unknown arguments
+        _flags='-nologo -Qdiag-error:4044,10157'
+        # -Qvec- -Qsimd- to prevent miscompilation, -GS, fp:precise for consistency
+        # with MSVC which enables it by default.
+        _cflags='-Qms0 -Qvec- -Qsimd- -GS -fp:precise'
+        disable stripping
+    elif $_cc -? 2>/dev/null | grep -q 'LLVM.*Linker'; then
+        # lld can emulate multiple different linkers; in ms link.exe mode,
+        # the -? parameter gives the help output which contains an identifyable
+        # string, while it gives an error in other modes.
+        _type=lld-link
+        # The link.exe mode doesn't have a switch for getting the version,
+        # but we can force it back to gnu mode and get the version from there.
+        _ident=$($_cc -flavor gnu --version 2>/dev/null)
+        _ld_o='-out:$@'
+        _flags_filter=msvc_flags
+        _ld_lib='lib%.a'
+        _ld_path='-libpath:'
+    elif $_cc -nologo- 2>&1 | grep -q Microsoft || { $_cc -v 2>&1 | grep -q clang && $_cc -? > /dev/null 2>&1; }; then
+        _type=msvc
+        if $_cc -nologo- 2>&1 | grep -q Microsoft; then
+            _ident=$($_cc 2>&1 | head -n1 | tr -d '\r')
+        else
+            _ident=$($_cc --version 2>/dev/null | head -n1 | tr -d '\r')
+        fi
+        _DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>&1 | awk '\''/including/ { sub(/^.*file: */, ""); gsub(/\\/, "/"); if (!match($$0, / /)) print "$@:", $$0 }'\'' > $(@:.o=.d)'
+        _DEPFLAGS='$(CPPFLAGS) $(CFLAGS) -showIncludes -Zs'
+        _cflags_speed="-O2"
+        _cflags_size="-O1"
+        _cflags_noopt="-O1"
+        if $_cc -nologo- 2>&1 | grep -q Linker; then
+            _ld_o='-out:$@'
+        else
+            _ld_o='-Fe$@'
+        fi
+        _cc_o='-Fo$@'
+        _cc_e='-P -Fi$@'
+        _flags_filter=msvc_flags
+        _ld_lib='lib%.a'
+        _ld_path='-libpath:'
+        _flags='-nologo'
+        disable stripping
+    elif $_cc --version 2>/dev/null | grep -q ^cparser; then
+        _type=cparser
+        _ident=$($_cc --version | head -n1)
+        _depflags='-MMD'
+        _cflags_speed='-O4'
+        _cflags_size='-O2'
+        _flags_filter=cparser_flags
+    fi
+
+    eval ${pfx}_type=\$_type
+    eval ${pfx}_ident=\$_ident
+}
+
+set_ccvars(){
+    eval ${1}_C=\${_cc_c-\${${1}_C}}
+    eval ${1}_E=\${_cc_e-\${${1}_E}}
+    eval ${1}_O=\${_cc_o-\${${1}_O}}
+
+    if [ -n "$_depflags" ]; then
+        eval ${1}_DEPFLAGS=\$_depflags
+    else
+        eval ${1}DEP=\${_DEPCMD:-\$DEPCMD}
+        eval ${1}DEP_FLAGS=\${_DEPFLAGS:-\$DEPFLAGS}
+        eval DEP${1}FLAGS=\$_flags
+    fi
+}
+
+probe_cc cc "$cc" "true"
+cflags_filter=$_flags_filter
+cflags_speed=$_cflags_speed
+cflags_size=$_cflags_size
+cflags_noopt=$_cflags_noopt
+add_cflags $_flags $_cflags
+cc_ldflags=$_ldflags
+set_ccvars CC
+set_ccvars CXX
+
+probe_cc hostcc "$host_cc"
+host_cflags_filter=$_flags_filter
+host_cflags_speed=$_cflags_speed
+add_host_cflags  $_flags $_cflags
+set_ccvars HOSTCC
+
+test -n "$cc_type" && enable $cc_type ||
+    warn "Unknown C compiler $cc, unable to select optimal CFLAGS"
+
+: ${as_default:=$cc}
+: ${objcc_default:=$cc}
+: ${dep_cc_default:=$cc}
+: ${ld_default:=$cc}
+: ${host_ld_default:=$host_cc}
+set_default ar as objcc dep_cc ld ln_s host_ld windres
+
+probe_cc as "$as"
+asflags_filter=$_flags_filter
+add_asflags $_flags $_cflags
+set_ccvars AS
+
+probe_cc objcc "$objcc"
+objcflags_filter=$_flags_filter
+add_objcflags $_flags $_cflags
+set_ccvars OBJC
+
+probe_cc ld "$ld"
+ldflags_filter=$_flags_filter
+add_ldflags $_flags $_ldflags
+test "$cc_type" != "$ld_type" && add_ldflags $cc_ldflags
+LD_O=${_ld_o-$LD_O}
+LD_LIB=${_ld_lib-$LD_LIB}
+LD_PATH=${_ld_path-$LD_PATH}
+
+probe_cc hostld "$host_ld"
+host_ldflags_filter=$_flags_filter
+add_host_ldflags $_flags $_ldflags
+HOSTLD_O=${_ld_o-$HOSTLD_O}
+
+if [ -z "$CC_DEPFLAGS" ] && [ "$dep_cc" != "$cc" ]; then
+    probe_cc depcc "$dep_cc"
+    CCDEP=${_DEPCMD:-$DEPCMD}
+    CCDEP_FLAGS=${_DEPFLAGS:=$DEPFLAGS}
+    DEPCCFLAGS=$_flags
+fi
+
+if $ar 2>&1 | grep -q Microsoft; then
+    arflags="-nologo"
+    ar_o='-out:$@'
+elif $ar 2>&1 | grep -q "\[D\] "; then
+    arflags="rcD"
+    ar_o='$@'
+else
+    arflags="rc"
+    ar_o='$@'
+fi
+
+add_cflags $extra_cflags
+add_cxxflags $extra_cxxflags
+add_objcflags $extra_objcflags
+add_asflags $extra_cflags
+
+if test -n "$sysroot"; then
+    case "$cc_type" in
+        gcc|llvm_gcc|clang)
+            add_cppflags --sysroot="$sysroot"
+            add_ldflags --sysroot="$sysroot"
+        ;;
+    esac
+fi
+
+if test "$cpu" = host; then
+    enabled cross_compile &&
+        warn "--cpu=host makes no sense when cross-compiling."
+
+    case "$cc_type" in
+        gcc|llvm_gcc)
+            check_native(){
+                $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
+                sed -n "/cc1.*$1=/{
+                            s/.*$1=\\([^ ]*\\).*/\\1/
+                            p
+                            q
+                        }" $TMPE
+            }
+            cpu=$(check_native -march || check_native -mcpu)
+        ;;
+        clang)
+            check_native(){
+                $cc $1=native -v -c -o $TMPO $TMPC >$TMPE 2>&1 || return
+                sed -n "/cc1.*-target-cpu /{
+                            s/.*-target-cpu \\([^ ]*\\).*/\\1/
+                            p
+                            q
+                        }" $TMPE
+            }
+            cpu=$(check_native -march)
+        ;;
+    esac
+
+    test "${cpu:-host}" = host &&
+        die "--cpu=host not supported with compiler $cc"
+fi
+
+# Deal with common $arch aliases
+case "$arch" in
+    aarch64|arm64)
+        arch="aarch64"
+    ;;
+    arm*|iPad*|iPhone*)
+        arch="arm"
+    ;;
+    loongarch*)
+        arch="loongarch"
+    ;;
+    mips*|IP*)
+        case "$arch" in
+        *el)
+            add_cppflags -EL
+            add_ldflags -EL
+        ;;
+        *eb)
+            add_cppflags -EB
+            add_ldflags -EB
+        ;;
+        esac
+        arch="mips"
+    ;;
+    parisc*|hppa*)
+        arch="parisc"
+    ;;
+    "Power Macintosh"|ppc*|powerpc*)
+        arch="ppc"
+    ;;
+    riscv*)
+        arch="riscv"
+    ;;
+    s390|s390x)
+        arch="s390"
+    ;;
+    sh4|sh)
+        arch="sh4"
+    ;;
+    sun4*|sparc*)
+        arch="sparc"
+    ;;
+    tilegx|tile-gx)
+        arch="tilegx"
+    ;;
+    i[3-6]86*|i86pc|BePC|x86pc|x86_64|x86_32|amd64)
+        arch="x86"
+    ;;
+esac
+
+is_in $arch $ARCH_LIST || warn "unknown architecture $arch"
+enable $arch
+
+# Add processor-specific flags
+if enabled aarch64; then
+
+    case $cpu in
+        armv*)
+            cpuflags="-march=$cpu"
+        ;;
+        *)
+            cpuflags="-mcpu=$cpu"
+        ;;
+    esac
+
+elif enabled alpha; then
+
+    cpuflags="-mcpu=$cpu"
+
+elif enabled arm; then
+
+    check_arm_arch() {
+        test_cpp_condition stddef.h \
+            "defined __ARM_ARCH_${1}__ || defined __TARGET_ARCH_${2:-$1}" \
+            $cpuflags
+    }
+
+    probe_arm_arch() {
+        if   check_arm_arch 4;        then echo armv4
+        elif check_arm_arch 4T;       then echo armv4t
+        elif check_arm_arch 5;        then echo armv5
+        elif check_arm_arch 5E;       then echo armv5e
+        elif check_arm_arch 5T;       then echo armv5t
+        elif check_arm_arch 5TE;      then echo armv5te
+        elif check_arm_arch 5TEJ;     then echo armv5te
+        elif check_arm_arch 6;        then echo armv6
+        elif check_arm_arch 6J;       then echo armv6j
+        elif check_arm_arch 6K;       then echo armv6k
+        elif check_arm_arch 6Z;       then echo armv6z
+        elif check_arm_arch 6KZ;      then echo armv6zk
+        elif check_arm_arch 6ZK;      then echo armv6zk
+        elif check_arm_arch 6T2;      then echo armv6t2
+        elif check_arm_arch 7;        then echo armv7
+        elif check_arm_arch 7A  7_A;  then echo armv7-a
+        elif check_arm_arch 7S;       then echo armv7-a
+        elif check_arm_arch 7R  7_R;  then echo armv7-r
+        elif check_arm_arch 7M  7_M;  then echo armv7-m
+        elif check_arm_arch 7EM 7E_M; then echo armv7-m
+        elif check_arm_arch 8A  8_A;  then echo armv8-a
+        fi
+    }
+
+
+    case $cpu in
+        generic)
+            subarch=$(probe_arm_arch | sed 's/[^a-z0-9]//g')
+        ;;
+        armv*)
+            cpuflags="-march=$cpu"
+            subarch=$(echo $cpu | sed 's/[^a-z0-9]//g')
+        ;;
+        *)
+            cpuflags="-mcpu=$cpu"
+            case $cpu in
+                cortex-a*)                               subarch=armv7a  ;;
+                cortex-r*)                               subarch=armv7r  ;;
+                cortex-m*)                 enable thumb; subarch=armv7m  ;;
+                arm11*)                                  subarch=armv6   ;;
+                arm[79]*e*|arm9[24]6*|arm96*|arm102[26]) subarch=armv5te ;;
+                armv4*|arm7*|arm9[24]*)                  subarch=armv4   ;;
+                *)                             subarch=$(probe_arm_arch) ;;
+            esac
+        ;;
+    esac
+
+    case "$subarch" in
+        armv5t*)    enable fast_clz                ;;
+        armv[6-8]*)
+            enable fast_clz
+            disabled fast_unaligned || enable fast_unaligned
+            ;;
+    esac
+
+    test_cflags -mfp16-format=ieee && add_cflags -mfp16-format=ieee
+
+elif enabled avr32; then
+
+    case $cpu in
+        ap7[02]0[0-2])
+            subarch="avr32_ap"
+            cpuflags="-mpart=$cpu"
+        ;;
+        ap)
+            subarch="avr32_ap"
+            cpuflags="-march=$cpu"
+        ;;
+        uc3[ab]*)
+            subarch="avr32_uc"
+            cpuflags="-mcpu=$cpu"
+        ;;
+        uc)
+            subarch="avr32_uc"
+            cpuflags="-march=$cpu"
+        ;;
+    esac
+
+elif enabled bfin; then
+
+    cpuflags="-mcpu=$cpu"
+
+elif enabled loongarch; then
+
+    enable local_aligned
+    enable simd_align_32
+    enable fast_64bit
+    enable fast_clz
+    enable fast_unaligned
+    case $cpu in
+        la464)
+            cpuflags="-march=$cpu"
+        ;;
+    esac
+elif enabled mips; then
+
+    if [ "$cpu" != "generic" ]; then
+        disable mips32r2
+        disable mips32r5
+        disable mips64r2
+        disable mips32r6
+        disable mips64r6
+        disable loongson2
+        disable loongson3
+        disable mipsdsp
+        disable mipsdspr2
+
+        cpuflags="-march=$cpu"
+
+        case $cpu in
+            # General ISA levels
+            mips1|mips3)
+            ;;
+            mips32r2)
+                enable mips32r2
+            ;;
+            mips32r5)
+                enable mips32r2
+                enable mips32r5
+            ;;
+            mips64r2|mips64r5)
+                enable mips64r2
+                enable loongson3
+            ;;
+            # Cores from MIPS(MTI)
+            24kc)
+                disable mipsfpu
+                enable mips32r2
+            ;;
+            24kf*|24kec|34kc|74Kc|1004kc)
+                enable mips32r2
+            ;;
+            24kef*|34kf*|1004kf*)
+                enable mipsdsp
+                enable mips32r2
+            ;;
+            p5600)
+                enable mips32r2
+                enable mips32r5
+                check_cflags "-mtune=p5600" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops"
+            ;;
+            i6400)
+                enable mips64r6
+                check_cflags "-mtune=i6400 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
+            ;;
+            p6600)
+                enable mips64r6
+                check_cflags "-mtune=p6600 -mabi=64" && check_cflags "-msched-weight -mload-store-pairs -funroll-loops" && check_ldflags "-mabi=64"
+            ;;
+            # Cores from Loongson
+            loongson2e|loongson2f|loongson3*)
+                enable local_aligned
+                enable simd_align_16
+                enable fast_64bit
+                enable fast_clz
+                enable fast_cmov
+                enable fast_unaligned
+                disable aligned_stack
+                # When gcc version less than 5.3.0, add -fno-expensive-optimizations flag.
+                if test "$cc_type" = "gcc"; then
+                    case $gcc_basever in
+                        2|2.*|3.*|4.*|5.0|5.1|5.2)
+                        expensive_optimization_flag="-fno-expensive-optimizations"
+                        ;;
+                        *)
+                        expensive_optimization_flag=""
+                        ;;
+                    esac
+                fi
+
+                case $cpu in
+                    loongson3*)
+                        enable loongson3
+                        cpuflags="-march=loongson3a -mhard-float $expensive_optimization_flag"
+                    ;;
+                    loongson2e)
+                        enable loongson2
+                        cpuflags="-march=loongson2e -mhard-float $expensive_optimization_flag"
+                    ;;
+                    loongson2f)
+                        enable loongson2
+                        cpuflags="-march=loongson2f -mhard-float $expensive_optimization_flag"
+                    ;;
+                esac
+            ;;
+            *)
+                warn "unknown MIPS CPU"
+            ;;
+        esac
+
+    else
+        disable mipsdsp
+        disable mipsdspr2
+        # Disable DSP stuff for generic CPU, it can't be detected at runtime.
+        warn 'generic cpu selected'
+    fi
+
+elif enabled ppc; then
+
+    disable ldbrx
+
+    case $(tolower $cpu) in
+        601|ppc601|powerpc601)
+            cpuflags="-mcpu=601"
+            disable altivec
+        ;;
+        603*|ppc603*|powerpc603*)
+            cpuflags="-mcpu=603"
+            disable altivec
+        ;;
+        604*|ppc604*|powerpc604*)
+            cpuflags="-mcpu=604"
+            disable altivec
+        ;;
+        g3|75*|ppc75*|powerpc75*)
+            cpuflags="-mcpu=750"
+            disable altivec
+        ;;
+        g4|745*|ppc745*|powerpc745*)
+            cpuflags="-mcpu=7450"
+            disable vsx
+        ;;
+        74*|ppc74*|powerpc74*)
+            cpuflags="-mcpu=7400"
+            disable vsx
+        ;;
+        g5|970|ppc970|powerpc970)
+            cpuflags="-mcpu=970"
+            disable vsx
+        ;;
+        power[3-6]*)
+            cpuflags="-mcpu=$cpu"
+            disable vsx
+        ;;
+        power[7-8]*)
+            cpuflags="-mcpu=$cpu"
+        ;;
+        cell)
+            cpuflags="-mcpu=cell"
+            enable ldbrx
+            disable vsx
+        ;;
+        e500mc)
+            cpuflags="-mcpu=e500mc"
+            disable altivec
+        ;;
+        e500v2)
+            cpuflags="-mcpu=8548 -mhard-float -mfloat-gprs=double"
+            disable altivec
+            disable dcbzl
+        ;;
+        e500)
+            cpuflags="-mcpu=8540 -mhard-float"
+            disable altivec
+            disable dcbzl
+        ;;
+    esac
+
+elif enabled riscv; then
+
+    if test_cpp_condition stddef.h "__riscv_zbb"; then
+        enable fast_clz
+    fi
+
+elif enabled sparc; then
+
+    case $cpu in
+        cypress|f93[04]|tsc701|sparcl*|supersparc|hypersparc|niagara|v[789])
+            cpuflags="-mcpu=$cpu"
+        ;;
+        ultrasparc*|niagara[234])
+            cpuflags="-mcpu=$cpu"
+        ;;
+    esac
+
+elif enabled x86; then
+
+    case $cpu in
+        i[345]86|pentium)
+            cpuflags="-march=$cpu"
+            disable i686
+            disable mmx
+        ;;
+        # targets that do NOT support nopl and conditional mov (cmov)
+        pentium-mmx|k6|k6-[23]|winchip-c6|winchip2|c3)
+            cpuflags="-march=$cpu"
+            disable i686
+        ;;
+        # targets that do support nopl and conditional mov (cmov)
+        i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx\
+        |core*|atom|bonnell|nehalem|westmere|silvermont|sandybridge|ivybridge|haswell|broadwell|skylake*|knl\
+        |amdfam10|barcelona|b[dt]ver*|znver*)
+            cpuflags="-march=$cpu"
+            enable i686
+            enable fast_cmov
+        ;;
+        # targets that do support conditional mov but on which it's slow
+        pentium4|pentium4m|prescott|nocona)
+            cpuflags="-march=$cpu"
+            enable i686
+            disable fast_cmov
+        ;;
+    esac
+
+fi
+
+if [ "$cpu" != generic ]; then
+    add_cflags  $cpuflags
+    add_asflags $cpuflags
+    test "$cc_type" = "$ld_type" && add_ldflags $cpuflags
+fi
+
+# compiler sanity check
+test_exec <<EOF
+int main(void){ return 0; }
+EOF
+if test "$?" != 0; then
+    echo "$cc is unable to create an executable file."
+    if test -z "$cross_prefix" && ! enabled cross_compile ; then
+        echo "If $cc is a cross-compiler, use the --enable-cross-compile option."
+        echo "Only do this if you know what cross compiling means."
+    fi
+    die "C compiler test failed."
+fi
+
+add_cppflags -D_ISOC99_SOURCE
+add_cxxflags -D__STDC_CONSTANT_MACROS
+check_cxxflags -std=c++11 || check_cxxflags -std=c++0x
+
+# some compilers silently accept -std=c11, so we also need to check that the
+# version macro is defined properly
+test_cflags_cc -std=c11 ctype.h "__STDC_VERSION__ >= 201112L" &&
+    add_cflags -std=c11 ||
+    check_cflags -std=c99
+
+check_cppflags -D_FILE_OFFSET_BITS=64
+check_cppflags -D_LARGEFILE_SOURCE
+
+add_host_cppflags -D_ISOC99_SOURCE
+check_host_cflags -std=c99
+check_host_cflags -Wall
+check_host_cflags $host_cflags_speed
+
+check_64bit(){
+    arch32=$1
+    arch64=$2
+    expr=${3:-'sizeof(void *) > 4'}
+    test_code cc "" "int test[2*($expr) - 1]" &&
+        subarch=$arch64 || subarch=$arch32
+    enable $subarch
+}
+
+case "$arch" in
+    aarch64|alpha|ia64)
+        enabled shared && enable_weak pic
+    ;;
+    loongarch)
+        check_64bit loongarch32 loongarch64
+        enabled loongarch64 && disable loongarch32
+        enabled shared && enable_weak pic
+    ;;
+    mips)
+        check_64bit mips mips64 '_MIPS_SIM > 1'
+        enabled shared && enable_weak pic
+    ;;
+    parisc)
+        check_64bit parisc parisc64
+        enabled shared && enable_weak pic
+    ;;
+    ppc)
+        check_64bit ppc ppc64
+        enabled shared && enable_weak pic
+    ;;
+    riscv)
+        check_64bit riscv32 riscv64
+        enabled shared && enable_weak pic
+    ;;
+    s390)
+        check_64bit s390 s390x
+        enabled shared && enable_weak pic
+    ;;
+    sparc)
+        check_64bit sparc sparc64
+        enabled shared && enable_weak pic
+    ;;
+    x86)
+        check_64bit x86_32 x86_64
+        # Treat x32 as x64 for now. Note it also needs pic if shared
+        test "$subarch" = "x86_32" && test_cpp_condition stddef.h 'defined(__x86_64__)' &&
+            subarch=x86_64 && enable x86_64 && disable x86_32
+        if enabled x86_64; then
+            enabled shared && enable_weak pic
+            objformat=elf64
+        fi
+    ;;
+esac
+
+# OS specific
+case $target_os in
+    aix)
+        SHFLAGS=-shared
+        add_cppflags '-I\$(SRC_PATH)/compat/aix'
+        enabled shared && add_ldflags -Wl,-brtl
+        arflags='-Xany -r -c'
+        striptype=""
+        ;;
+    android)
+        disable symver
+        enable section_data_rel_ro
+        add_cflags -fPIE
+        add_ldexeflags -fPIE -pie
+        SLIB_INSTALL_NAME='$(SLIBNAME)'
+        SLIB_INSTALL_LINKS=
+        SHFLAGS='-shared -Wl,-soname,$(SLIBNAME)'
+        ;;
+    haiku)
+        prefix_default="/boot/common"
+        network_extralibs="-lnetwork"
+        host_extralibs=
+        ;;
+    sunos)
+        SHFLAGS='-shared -Wl,-h,$$(@F)'
+        enabled x86 && append SHFLAGS -mimpure-text
+        network_extralibs="-lsocket -lnsl"
+        add_cppflags -D__EXTENSIONS__
+        # When using suncc to build, the Solaris linker will mark
+        # an executable with each instruction set encountered by
+        # the Solaris assembler.  As our libraries contain their own
+        # guards for processor-specific code, instead suppress
+        # generation of the HWCAPS ELF section on Solaris x86 only.
+        enabled_all suncc x86 &&
+            echo "hwcap_1 = OVERRIDE;" > mapfile &&
+            add_ldflags -Wl,-M,mapfile
+        nm_default='nm -P -g'
+        striptype=""
+        version_script='-M'
+        VERSION_SCRIPT_POSTPROCESS_CMD='perl $(SRC_PATH)/compat/solaris/make_sunver.pl - $(OBJS)'
+        ;;
+    netbsd)
+        disable symver
+        oss_indev_extralibs="-lossaudio"
+        oss_outdev_extralibs="-lossaudio"
+        enabled gcc || check_ldflags -Wl,-zmuldefs
+        ;;
+    openbsd|bitrig)
+        disable symver
+        enable section_data_rel_ro
+        striptype=""
+        SHFLAGS='-shared'
+        SLIB_INSTALL_NAME='$(SLIBNAME).$(LIBMAJOR).$(LIBMINOR)'
+        SLIB_INSTALL_LINKS=
+        oss_indev_extralibs="-lossaudio"
+        oss_outdev_extralibs="-lossaudio"
+        ;;
+    dragonfly)
+        disable symver
+        ;;
+    freebsd)
+        ;;
+    bsd/os)
+        add_extralibs -lpoll -lgnugetopt
+        strip="strip -d"
+        ;;
+    darwin)
+        enabled ppc && add_asflags -force_cpusubtype_ALL
+        install_name_dir_default='$(SHLIBDIR)'
+        SHFLAGS='-dynamiclib -Wl,-single_module -Wl,-install_name,$(INSTALL_NAME_DIR)/$(SLIBNAME_WITH_MAJOR),-current_version,$(LIBVERSION),-compatibility_version,$(LIBMAJOR)'
+        enabled x86_32 && append SHFLAGS -Wl,-read_only_relocs,suppress
+        strip="${strip} -x"
+        add_ldflags -Wl,-dynamic,-search_paths_first
+        check_cflags -Werror=partial-availability
+        SLIBSUF=".dylib"
+        SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME).$(LIBVERSION)$(SLIBSUF)'
+        SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME).$(LIBMAJOR)$(SLIBSUF)'
+        enabled x86_64 && objformat="macho64" || objformat="macho32"
+        enabled_any pic shared x86_64 ||
+            { check_cflags -mdynamic-no-pic && add_asflags -mdynamic-no-pic; }
+        check_headers dispatch/dispatch.h &&
+            add_cppflags '-I\$(SRC_PATH)/compat/dispatch_semaphore'
+        if test -n "$sysroot"; then
+            is_in -isysroot $cc $CPPFLAGS $CFLAGS || check_cppflags -isysroot $sysroot
+            is_in -isysroot $ld $LDFLAGS          || check_ldflags  -isysroot $sysroot
+        fi
+        version_script='-exported_symbols_list'
+        VERSION_SCRIPT_POSTPROCESS_CMD='tr " " "\n" | sed -n /global:/,/local:/p | grep ";" | tr ";" "\n" | sed -E "s/(.+)/_\1/g" | sed -E "s/(.+[^*])$$$$/\1*/"'
+        # Workaround for Xcode 11 -fstack-check bug
+        if enabled clang; then
+            clang_version=$($cc -dumpversion)
+            test ${clang_version%%.*} -eq 11 && add_cflags -fno-stack-check
+        fi
+        ;;
+    msys*)
+        die "Native MSYS builds are discouraged, please use the MINGW environment."
+        ;;
+    mingw32*|mingw64*)
+        target_os=mingw32
+        LIBTARGET=i386
+        if enabled x86_64; then
+            LIBTARGET="i386:x86-64"
+        elif enabled arm; then
+            LIBTARGET="arm"
+        elif enabled aarch64; then
+            LIBTARGET="arm64"
+        fi
+        if enabled shared; then
+            # Cannot build both shared and static libs when using dllimport.
+            disable static
+        fi
+        ! enabled small && test_cmd $windres --version && enable gnu_windres
+        enabled x86_32 && check_ldflags -Wl,--large-address-aware
+        shlibdir_default="$bindir_default"
+        SLIBPREF=""
+        SLIBSUF=".dll"
+        SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
+        SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
+        if test_cmd lib.exe -list; then
+            SLIB_EXTRA_CMD=-'lib.exe -nologo -machine:$(LIBTARGET) -def:$$(@:$(SLIBSUF)=.def) -out:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
+            if enabled x86_64; then
+                LIBTARGET=x64
+            fi
+        else
+            SLIB_EXTRA_CMD=-'$(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
+        fi
+        SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
+        SLIB_INSTALL_LINKS=
+        SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
+        SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
+        SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
+        SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--disable-auto-image-base $$(@:$(SLIBSUF)=.def)'
+        enabled x86_64 && objformat="win64" || objformat="win32"
+        dlltool="${cross_prefix}dlltool"
+        ranlib=:
+        enable dos_paths
+        check_ldflags -Wl,--nxcompat,--dynamicbase
+        # Lets work around some stupidity in binutils.
+        # ld will strip relocations from executables even though we need them
+        # for dynamicbase (ASLR).  Using -pie does retain the reloc section
+        # however ld then forgets what the entry point should be (oops) so we
+        # have to manually (re)set it.
+        if enabled x86_32; then
+            disabled debug && add_ldexeflags -Wl,--pic-executable,-e,_mainCRTStartup
+        elif enabled x86_64; then
+            disabled debug && add_ldexeflags -Wl,--pic-executable,-e,mainCRTStartup
+            check_ldflags -Wl,--high-entropy-va # binutils 2.25
+            # Set image base >4GB for extra entropy with HEASLR
+            add_ldexeflags -Wl,--image-base,0x140000000
+            append SHFLAGS -Wl,--image-base,0x180000000
+        fi
+        ;;
+    win32|win64)
+        disable symver
+        if enabled shared; then
+            # Link to the import library instead of the normal static library
+            # for shared libs.
+            LD_LIB='%.lib'
+            # Cannot build both shared and static libs with MSVC or icl.
+            disable static
+        fi
+        ! enabled small && test_cmd $windres --version && enable gnu_windres
+        enabled x86_32 && check_ldflags -LARGEADDRESSAWARE
+        shlibdir_default="$bindir_default"
+        SLIBPREF=""
+        SLIBSUF=".dll"
+        SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
+        SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
+        SLIB_CREATE_DEF_CMD='EXTERN_PREFIX="$(EXTERN_PREFIX)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
+        SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
+        SLIB_INSTALL_LINKS=
+        SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
+        SLIB_INSTALL_EXTRA_LIB='$(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
+        SHFLAGS='-dll -def:$$(@:$(SLIBSUF)=.def) -implib:$(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib)'
+        enabled x86_64 && objformat="win64" || objformat="win32"
+        ranlib=:
+        enable dos_paths
+        ;;
+    cygwin*)
+        target_os=cygwin
+        shlibdir_default="$bindir_default"
+        SLIBPREF="cyg"
+        SLIBSUF=".dll"
+        SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
+        SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
+        SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
+        SLIB_INSTALL_LINKS=
+        SLIB_INSTALL_EXTRA_LIB='lib$(FULLNAME).dll.a'
+        SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
+        enabled x86_64 && objformat="win64" || objformat="win32"
+        enable dos_paths
+        ! enabled small && test_cmd $windres --version && enable gnu_windres
+        add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
+        ;;
+    *-dos|freedos|opendos)
+        network_extralibs="-lsocket"
+        objformat="coff"
+        enable dos_paths
+        ;;
+    linux)
+        enable section_data_rel_ro
+        enabled_any arm aarch64 && enable_weak linux_perf
+        ;;
+    irix*)
+        target_os=irix
+        ranlib="echo ignoring ranlib"
+        ;;
+    os/2*)
+        strip="lxlite -CS"
+        striptype=""
+        objformat="aout"
+        add_cppflags -D_GNU_SOURCE
+        add_ldflags -Zomf -Zbin-files -Zargs-wild -Zhigh-mem -Zmap
+        SHFLAGS='$(SUBDIR)$(NAME).def -Zdll -Zomf'
+        LIBSUF="_s.a"
+        SLIBPREF=""
+        SLIBSUF=".dll"
+        SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'
+        SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(shell echo $(FULLNAME) | cut -c1-6)$(LIBMAJOR)$(SLIBSUF)'
+        SLIB_CREATE_DEF_CMD='echo LIBRARY $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=) INITINSTANCE TERMINSTANCE > $(SUBDIR)$(FULLNAME).def; \
+            echo CODE PRELOAD MOVEABLE DISCARDABLE >> $(SUBDIR)$(FULLNAME).def; \
+            echo DATA PRELOAD MOVEABLE MULTIPLE NONSHARED >> $(SUBDIR)$(FULLNAME).def; \
+            echo EXPORTS >> $(SUBDIR)$(FULLNAME).def; \
+            emxexp $(OBJS) >> $(SUBDIR)$(FULLNAME).def'
+        SLIB_EXTRA_CMD='emximp -o $(SUBDIR)$(LIBPREF)$(FULLNAME)_dll.a $(SUBDIR)$(FULLNAME).def; \
+            emximp -o $(SUBDIR)$(LIBPREF)$(FULLNAME)_dll.lib $(SUBDIR)$(FULLNAME).def;'
+        SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
+        SLIB_INSTALL_LINKS=
+        SLIB_INSTALL_EXTRA_LIB='$(LIBPREF)$(FULLNAME)_dll.a $(LIBPREF)$(FULLNAME)_dll.lib'
+        enable dos_paths
+        enable_weak os2threads
+        ;;
+    gnu/kfreebsd)
+        add_cppflags -D_BSD_SOURCE
+        ;;
+    gnu)
+        ;;
+    qnx)
+        add_cppflags -D_QNX_SOURCE
+        network_extralibs="-lsocket"
+        ;;
+    symbian)
+        SLIBSUF=".dll"
+        enable dos_paths
+        add_cflags --include=$sysinclude/gcce/gcce.h -fvisibility=default
+        add_cppflags -D__GCCE__ -D__SYMBIAN32__ -DSYMBIAN_OE_POSIX_SIGNALS
+        add_ldflags -Wl,--target1-abs,--no-undefined \
+                    -Wl,-Ttext,0x80000,-Tdata,0x1000000 -shared \
+                    -Wl,--entry=_E32Startup -Wl,-u,_E32Startup
+        add_extralibs -l:eexe.lib -l:usrt2_2.lib -l:dfpaeabi.dso \
+                      -l:drtaeabi.dso -l:scppnwdl.dso -lsupc++ -lgcc \
+                      -l:libc.dso -l:libm.dso -l:euser.dso -l:libcrt0.lib
+        ;;
+    minix)
+        ;;
+    none)
+        ;;
+    *)
+        die "Unknown OS '$target_os'."
+        ;;
+esac
+
+# test if creating links works
+link_dest=$(mktemp -u $TMPDIR/dest_XXXXXXXX)
+link_name=$(mktemp -u $TMPDIR/name_XXXXXXXX)
+mkdir "$link_dest"
+$ln_s "$link_dest" "$link_name"
+touch "$link_dest/test_file"
+if [ "$source_path" != "." ] && [ "$source_path" != "src" ] && ([ ! -d src ] || [ -L src ]) && [ -e "$link_name/test_file" ]; then
+    # create link to source path
+    [ -e src ] && rm src
+    $ln_s "$source_path" src
+    source_link=src
+else
+    # creating directory links doesn't work
+    # fall back to using the full source path
+    source_link="$source_path"
+fi
+# cleanup
+rm -r "$link_dest"
+rm -r "$link_name"
+
+# determine libc flavour
+
+probe_libc(){
+    pfx=$1
+    pfx_no_=${pfx%_}
+    # uclibc defines __GLIBC__, so it needs to be checked before glibc.
+    if test_${pfx}cpp_condition features.h "defined __UCLIBC__"; then
+        eval ${pfx}libc_type=uclibc
+        add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
+    elif test_${pfx}cpp_condition features.h "defined __GLIBC__"; then
+        eval ${pfx}libc_type=glibc
+        add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
+    # MinGW headers can be installed on Cygwin, so check for newlib first.
+    elif test_${pfx}cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
+        eval ${pfx}libc_type=newlib
+        add_${pfx}cppflags -U__STRICT_ANSI__ -D_XOPEN_SOURCE=600
+    # MinGW64 is backwards compatible with MinGW32, so check for it first.
+    elif test_${pfx}cpp_condition _mingw.h "defined __MINGW64_VERSION_MAJOR"; then
+        eval ${pfx}libc_type=mingw64
+        if test_${pfx}cpp_condition _mingw.h "__MINGW64_VERSION_MAJOR < 3"; then
+            add_compat msvcrt/snprintf.o
+            add_cflags "-include $source_path/compat/msvcrt/snprintf.h"
+        fi
+        add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
+        eval test \$${pfx_no_}cc_type = "gcc" &&
+            add_${pfx}cppflags -D__printf__=__gnu_printf__
+        test_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
+            add_${pfx}cppflags -D_WIN32_WINNT=0x0600
+        add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
+    elif test_${pfx}cpp_condition _mingw.h "defined __MINGW_VERSION"  ||
+         test_${pfx}cpp_condition _mingw.h "defined __MINGW32_VERSION"; then
+        eval ${pfx}libc_type=mingw32
+        test_${pfx}cpp_condition _mingw.h "__MINGW32_MAJOR_VERSION > 3 || \
+            (__MINGW32_MAJOR_VERSION == 3 && __MINGW32_MINOR_VERSION >= 15)" ||
+            die "ERROR: MinGW32 runtime version must be >= 3.15."
+        add_${pfx}cppflags -U__STRICT_ANSI__ -D__USE_MINGW_ANSI_STDIO=1
+        test_${pfx}cpp_condition _mingw.h "__MSVCRT_VERSION__ < 0x0700" &&
+            add_${pfx}cppflags -D__MSVCRT_VERSION__=0x0700
+        test_${pfx}cpp_condition windows.h "!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600" &&
+            add_${pfx}cppflags -D_WIN32_WINNT=0x0600
+        eval test \$${pfx_no_}cc_type = "gcc" &&
+            add_${pfx}cppflags -D__printf__=__gnu_printf__
+        add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
+    elif test_${pfx}cpp_condition crtversion.h "defined _VC_CRT_MAJOR_VERSION"; then
+        eval ${pfx}libc_type=msvcrt
+        if test_${pfx}cpp_condition crtversion.h "_VC_CRT_MAJOR_VERSION < 14"; then
+            if [ "$pfx" = host_ ]; then
+                add_host_cppflags -Dsnprintf=_snprintf
+            else
+                add_compat strtod.o strtod=avpriv_strtod
+                add_compat msvcrt/snprintf.o snprintf=avpriv_snprintf   \
+                                             _snprintf=avpriv_snprintf  \
+                                             vsnprintf=avpriv_vsnprintf
+            fi
+        fi
+        add_${pfx}cppflags -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_WARNINGS
+        # The MSVC 2010 headers (Win 7.0 SDK) set _WIN32_WINNT to
+        # 0x601 by default unless something else is set by the user.
+        # This can easily lead to us detecting functions only present
+        # in such new versions and producing binaries requiring windows 7.0.
+        # Therefore explicitly set the default to Vista unless the user has
+        # set something else on the command line.
+        # Don't do this if WINAPI_FAMILY is set and is set to a non-desktop
+        # family. For these cases, configure is free to use any functions
+        # found in the SDK headers by default. (Alternatively, we could force
+        # _WIN32_WINNT to 0x0602 in that case.)
+        test_${pfx}cpp_condition stdlib.h "defined(_WIN32_WINNT)" ||
+            { test_${pfx}cpp <<EOF && add_${pfx}cppflags -D_WIN32_WINNT=0x0600; }
+#ifdef WINAPI_FAMILY
+#include <winapifamily.h>
+#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#error not desktop
+#endif
+#endif
+EOF
+        if [ "$pfx" = "" ]; then
+            check_func strtoll || add_cflags -Dstrtoll=_strtoi64
+            check_func strtoull || add_cflags -Dstrtoull=_strtoui64
+        fi
+    elif test_${pfx}cpp_condition stddef.h "defined __KLIBC__"; then
+        eval ${pfx}libc_type=klibc
+    elif test_${pfx}cpp_condition sys/cdefs.h "defined __BIONIC__"; then
+        eval ${pfx}libc_type=bionic
+    elif test_${pfx}cpp_condition sys/brand.h "defined LABELED_BRAND_NAME"; then
+        eval ${pfx}libc_type=solaris
+        add_${pfx}cppflags -D__EXTENSIONS__ -D_XOPEN_SOURCE=600
+    elif test_${pfx}cpp_condition sys/version.h "defined __DJGPP__"; then
+        eval ${pfx}libc_type=djgpp
+        add_cppflags -U__STRICT_ANSI__
+        add_cflags "-include $source_path/compat/djgpp/math.h"
+        add_compat djgpp/math.o
+    fi
+    test_${pfx}cc <<EOF
+#include <time.h>
+void *v = localtime_r;
+EOF
+test "$?" != 0 && test_${pfx}cc -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 <<EOF && add_${pfx}cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
+#include <time.h>
+void *v = localtime_r;
+EOF
+
+    eval test -n "\${${pfx}libc_type}" && enable ${pfx}libc_${libc_type}
+}
+
+probe_libc
+probe_libc host_
+
+# hacks for compiler/libc/os combinations
+
+case $libc_type in
+    bionic)
+        add_compat strtod.o strtod=avpriv_strtod
+        ;;
+esac
+
+check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
+    add_cppflags '-I\$(SRC_PATH)/compat/float'
+
+test_cpp_condition stdlib.h "defined(__PIC__) || defined(__pic__) || defined(PIC)" && enable_weak pic
+
+set_default libdir
+: ${shlibdir_default:="$libdir"}
+: ${pkgconfigdir_default:="$libdir/pkgconfig"}
+
+set_default $PATHS_LIST
+set_default nm
+
+disabled optimizations || enabled ossfuzz || check_cflags -fomit-frame-pointer
+
+enable_weak_pic() {
+    disabled pic && return
+    enable pic
+    add_cppflags -DPIC
+    case "$target_os" in
+    mingw*|cygwin*|win*)
+        ;;
+    *)
+        add_cflags -fPIC
+        add_asflags -fPIC
+        ;;
+    esac
+}
+
+enabled pic && enable_weak_pic
+
+test_cc <<EOF || die "Symbol mangling check failed."
+int ff_extern;
+EOF
+sym=$($nm $TMPO | awk '/ff_extern/{ print substr($0, match($0, /[^ \t]*ff_extern/)) }')
+extern_prefix=${sym%%ff_extern*}
+
+! disabled inline_asm && check_inline_asm inline_asm '"" ::'
+
+for restrict_keyword in restrict __restrict__ __restrict ""; do
+    test_code cc "" "char * $restrict_keyword p" && break
+done
+
+check_cc pragma_deprecated "" '_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")'
+
+# The global variable ensures the bits appear unchanged in the object file.
+test_cc <<EOF || die "endian test failed"
+unsigned int endian = 'B' << 24 | 'I' << 16 | 'G' << 8 | 'E';
+EOF
+od -t x1 $TMPO | grep -q '42 *49 *47 *45' && enable bigendian
+
+check_cc const_nan math.h "struct { double d; } static const bar[] = { { NAN } }"
+
+if ! enabled ppc64 || enabled bigendian; then
+    disable vsx
+fi
+
+check_gas() {
+    log "check_gas using '$as' as AS"
+    # :vararg is used on aarch64, arm and ppc altivec
+    check_as vararg "
+.macro m n, y:vararg=0
+\n: .int \y
+.endm
+m x" || return 1
+    # .altmacro is only used in arm asm
+    ! enabled arm || check_as gnu_as ".altmacro"
+}
+
+if enabled_any arm aarch64 || enabled_all ppc altivec && enabled asm; then
+    nogas=:
+    enabled_any arm aarch64 && nogas=die
+    enabled_all ppc altivec && [ $target_os_default != aix ] && nogas=warn
+    as_noop=-v
+
+    case $as_type in
+        arm*) gaspp_as_type=armasm; as_noop=-h ;;
+        gcc)  gaspp_as_type=gas ;;
+        *)    gaspp_as_type=$as_type ;;
+    esac
+
+    [ $target_os = "darwin" ] && gaspp_as_type="apple-$gaspp_as_type"
+
+    test "${as#*gas-preprocessor.pl}" != "$as" ||
+    test_cmd gas-preprocessor.pl -arch $arch -as-type $gaspp_as_type -- ${as:=$cc} $as_noop &&
+        gas="${gas:=gas-preprocessor.pl} -arch $arch -as-type $gaspp_as_type -- ${as:=$cc}"
+
+    if ! check_gas ; then
+        as=${gas:=$as}
+        check_gas || \
+            $nogas "GNU assembler not found, install/update gas-preprocessor"
+    fi
+
+    check_as as_func ".func test
+                      .endfunc"
+fi
+
+check_inline_asm inline_asm_labels '"1:\n"'
+
+check_inline_asm inline_asm_nonlocal_labels '"Label:\n"'
+
+if enabled aarch64; then
+    enabled armv8 && check_insn armv8 'prfm   pldl1strm, [x0]'
+    # internal assembler in clang 3.3 does not support this instruction
+    enabled neon && check_insn neon 'ext   v0.8B, v0.8B, v1.8B, #1'
+    enabled vfp  && check_insn vfp  'fmadd d0,    d0,    d1,    d2'
+
+    map 'enabled_any ${v}_external ${v}_inline || disable $v' $ARCH_EXT_LIST_ARM
+
+elif enabled alpha; then
+
+    check_cflags -mieee
+
+elif enabled arm; then
+
+    enabled msvc && check_cpp_condition thumb stddef.h "defined _M_ARMT"
+    test_cpp_condition stddef.h "defined __thumb__" && test_cc <<EOF && enable_weak thumb
+float func(float a, float b){ return a+b; }
+EOF
+    enabled thumb && check_cflags -mthumb || check_cflags -marm
+
+    if check_cpp_condition vfp_args stddef.h "defined __ARM_PCS_VFP"; then
+        :
+    elif check_cpp_condition vfp_args stddef.h "defined _M_ARM_FP && _M_ARM_FP >= 30"; then
+        :
+    elif ! test_cpp_condition stddef.h "defined __ARM_PCS || defined __SOFTFP__" && [ $target_os != darwin ]; then
+        case "${cross_prefix:-$cc}" in
+            *hardfloat*) enable vfp_args; fpabi=vfp ;;
+            *) check_ld "cc" vfp_args <<EOF && fpabi=vfp || fpabi=soft ;;
+__asm__ (".eabi_attribute 28, 1");
+int main(void) { return 0; }
+EOF
+        esac
+        warn "Compiler does not indicate floating-point ABI, guessing $fpabi."
+    fi
+
+    enabled armv5te && check_insn armv5te 'qadd r0, r0, r0'
+    enabled armv6   && check_insn armv6   'sadd16 r0, r0, r0'
+    enabled armv6t2 && check_insn armv6t2 'movt r0, #0'
+    enabled neon    && check_insn neon    'vadd.i16 q0, q0, q0'
+    enabled vfp     && check_insn vfp     'fadds s0, s0, s0'
+    enabled vfpv3   && check_insn vfpv3   'vmov.f32 s0, #1.0'
+    enabled setend  && check_insn setend  'setend be'
+
+    [ $target_os = linux ] || [ $target_os = android ] ||
+        map 'enabled_any ${v}_external ${v}_inline || disable $v' \
+            $ARCH_EXT_LIST_ARM
+
+    check_inline_asm asm_mod_q '"add r0, %Q0, %R0" :: "r"((long long)0)'
+
+    check_as as_arch_directive ".arch armv7-a"
+    check_as as_dn_directive   "ra .dn d0.i16"
+    check_as as_fpu_directive  ".fpu neon"
+
+    # llvm's integrated assembler supports .object_arch from llvm 3.5
+    [ "$objformat" = elf32 ] || [ "$objformat" = elf64 ] &&
+        check_as as_object_arch ".object_arch armv4"
+
+    # MS armasm fails to assemble our PIC constructs
+    [ $target_os != win32 ] && enabled_all armv6t2 shared !pic && enable_weak_pic
+
+elif enabled mips; then
+
+    # Check toolchain ISA level
+    if enabled mips64; then
+        enabled mips64r6 && check_inline_asm mips64r6 '"dlsa $0, $0, $0, 1"' &&
+            disable mips64r2
+
+        enabled mips64r2 && check_inline_asm mips64r2 '"dext $0, $0, 0, 1"'
+
+        disable mips32r6 && disable mips32r5 && disable mips32r2
+    else
+        enabled mips32r6 && check_inline_asm mips32r6 '"aui $0, $0, 0"' &&
+            disable mips32r5 && disable mips32r2
+
+        enabled mips32r5 && check_inline_asm mips32r5 '"eretnc"'
+        enabled mips32r2 && check_inline_asm mips32r2 '"ext $0, $0, 0, 1"'
+
+        disable mips64r6 && disable mips64r5 && disable mips64r2
+    fi
+
+    enabled mipsfpu && check_inline_asm mipsfpu '"cvt.d.l $f0, $f2"'
+    enabled mipsfpu && (enabled mips32r5 || enabled mips32r6 || enabled mips64r6) && check_inline_asm_flags mipsfpu '"cvt.d.l $f0, $f1"' '-mfp64'
+
+    enabled mipsdsp && check_inline_asm_flags mipsdsp '"addu.qb $t0, $t1, $t2"' '-mdsp'
+    enabled mipsdspr2 && check_inline_asm_flags mipsdspr2 '"absq_s.qb $t0, $t1"' '-mdspr2'
+
+    # MSA can be detected at runtime so we supply extra flags here
+    enabled mipsfpu && enabled msa && check_inline_asm msa '"addvi.b $w0, $w1, 1"' '-mmsa' && append MSAFLAGS '-mmsa'
+
+    # loongson2 have no switch cflag so we can only probe toolchain ability
+    enabled loongson2 && check_inline_asm loongson2 '"dmult.g $8, $9, $10"' && disable loongson3
+
+    # loongson3 is paired with MMI
+    enabled loongson3 && check_inline_asm loongson3 '"gsldxc1 $f0, 0($2, $3)"' '-mloongson-ext' && append MMIFLAGS '-mloongson-ext'
+
+    # MMI can be detected at runtime too
+    enabled mmi && check_inline_asm mmi '"pxor $f0, $f0, $f0"' '-mloongson-mmi' && append MMIFLAGS '-mloongson-mmi'
+
+    if enabled bigendian && enabled msa; then
+        disable msa
+    fi
+
+elif enabled parisc; then
+
+    if enabled gcc; then
+        case $($cc -dumpversion) in
+            4.[3-9].*) check_cflags -fno-optimize-sibling-calls ;;
+        esac
+    fi
+
+elif enabled ppc; then
+
+    enable local_aligned
+
+    check_inline_asm dcbzl     '"dcbzl 0, %0" :: "r"(0)'
+    check_inline_asm ibm_asm   '"add 0, 0, 0"'
+    check_inline_asm ppc4xx    '"maclhw r10, r11, r12"'
+    check_inline_asm xform_asm '"lwzx %1, %y0" :: "Z"(*(int*)0), "r"(0)'
+
+    if enabled altivec; then
+        check_cflags -maltivec -mabi=altivec
+
+        # check if our compiler supports Motorola AltiVec C API
+        check_cc altivec altivec.h "vector signed int v1 = (vector signed int) { 0 };
+                                    vector signed int v2 = (vector signed int) { 1 };
+                                    v1 = vec_add(v1, v2);"
+
+        enabled altivec || warn "Altivec disabled, possibly missing --cpu flag"
+    fi
+
+    if enabled vsx; then
+        check_cflags -mvsx &&
+        check_cc vsx altivec.h "int v[4] = { 0 };
+                                vector signed int v1 = vec_vsx_ld(0, v);"
+    fi
+
+    if enabled power8; then
+        check_cpp_condition power8 "altivec.h" "defined(_ARCH_PWR8)"
+    fi
+
+elif enabled riscv; then
+
+    enabled rvv && check_inline_asm rvv '".option arch, +v\nvsetivli zero, 0, e8, m1, ta, ma"'
+
+elif enabled x86; then
+
+    check_builtin rdtsc    intrin.h   "__rdtsc()"
+    check_builtin mm_empty mmintrin.h "_mm_empty()"
+
+    enable local_aligned
+
+    # check whether EBP is available on x86
+    # As 'i' is stored on the stack, this program will crash
+    # if the base pointer is used to access it because the
+    # base pointer is cleared in the inline assembly code.
+    check_exec_crash <<EOF && enable ebp_available
+volatile int i=0;
+__asm__ volatile ("xorl %%ebp, %%ebp" ::: "%ebp");
+return i;
+EOF
+
+    # check whether EBX is available on x86
+    check_inline_asm ebx_available '""::"b"(0)' &&
+        check_inline_asm ebx_available '"":::"%ebx"'
+
+    # check whether xmm clobbers are supported
+    check_inline_asm xmm_clobbers '"":::"%xmm0"'
+
+    check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test, %eax"' ||
+        check_inline_asm inline_asm_direct_symbol_refs '"movl '$extern_prefix'test(%rip), %eax"'
+
+    # check whether binutils is new enough to compile SSSE3/MMXEXT
+    enabled ssse3  && check_inline_asm ssse3_inline  '"pabsw %xmm0, %xmm0"'
+    enabled mmxext && check_inline_asm mmxext_inline '"pmaxub %mm0, %mm1"'
+
+    probe_x86asm(){
+        x86asmexe_probe=$1
+        if test_cmd $x86asmexe_probe -v; then
+            x86asmexe=$x86asmexe_probe
+            x86asm_type=nasm
+            x86asm_debug="-g -F dwarf"
+            X86ASMDEP=
+            X86ASM_DEPFLAGS='-MD $(@:.o=.d)'
+        elif test_cmd $x86asmexe_probe --version; then
+            x86asmexe=$x86asmexe_probe
+            x86asm_type=yasm
+            x86asm_debug="-g dwarf2"
+            X86ASMDEP='$(DEPX86ASM) $(X86ASMFLAGS) -M $(X86ASM_O) $< > $(@:.o=.d)'
+            X86ASM_DEPFLAGS=
+        fi
+        check_x86asm x86asm "movbe ecx, [5]"
+    }
+
+    if ! disabled_any asm mmx x86asm; then
+        disable x86asm
+        for program in $x86asmexe nasm yasm; do
+            probe_x86asm $program && break
+        done
+        disabled x86asm && die "nasm/yasm not found or too old. Use --disable-x86asm for a crippled build."
+        X86ASMFLAGS="-f $objformat"
+        enabled pic               && append X86ASMFLAGS "-DPIC"
+        test -n "$extern_prefix"  && append X86ASMFLAGS "-DPREFIX"
+        case "$objformat" in
+            elf*) enabled debug && append X86ASMFLAGS $x86asm_debug ;;
+        esac
+
+        enabled avx512    && check_x86asm avx512_external    "vmovdqa32 [eax]{k1}{z}, zmm0"
+        enabled avx512icl && check_x86asm avx512icl_external "vpdpwssds zmm31{k1}{z}, zmm29, zmm28"
+        enabled avx2      && check_x86asm avx2_external      "vextracti128 xmm0, ymm0, 0"
+        enabled xop       && check_x86asm xop_external       "vpmacsdd xmm0, xmm1, xmm2, xmm3"
+        enabled fma4      && check_x86asm fma4_external      "vfmaddps ymm0, ymm1, ymm2, ymm3"
+        check_x86asm cpunop          "CPU amdnop"
+    fi
+
+    case "$cpu" in
+        athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
+            disable fast_clz
+        ;;
+    esac
+
+elif enabled loongarch; then
+    enabled lsx && check_inline_asm lsx '"vadd.b $vr0, $vr1, $vr2"' '-mlsx' && append LSXFLAGS '-mlsx'
+    enabled lasx && check_inline_asm lasx '"xvadd.b $xr0, $xr1, $xr2"' '-mlasx' && append LASXFLAGS '-mlasx'
+fi
+
+check_cc intrinsics_neon arm_neon.h "int16x8_t test = vdupq_n_s16(0)"
+
+check_ldflags -Wl,--as-needed
+check_ldflags -Wl,-z,noexecstack
+
+if ! disabled network; then
+    check_func getaddrinfo $network_extralibs
+    check_func inet_aton $network_extralibs
+
+    check_type netdb.h "struct addrinfo"
+    check_type netinet/in.h "struct group_source_req" -D_BSD_SOURCE
+    check_type netinet/in.h "struct ip_mreq_source" -D_BSD_SOURCE
+    check_type netinet/in.h "struct ipv6_mreq" -D_DARWIN_C_SOURCE
+    check_type poll.h "struct pollfd"
+    check_type netinet/sctp.h "struct sctp_event_subscribe"
+    check_struct "sys/socket.h" "struct msghdr" msg_flags
+    check_struct "sys/types.h sys/socket.h" "struct sockaddr" sa_len
+    check_type netinet/in.h "struct sockaddr_in6"
+    check_type "sys/types.h sys/socket.h" "struct sockaddr_storage"
+    check_type "sys/types.h sys/socket.h" socklen_t
+
+    # Prefer arpa/inet.h over winsock2
+    if check_headers arpa/inet.h ; then
+        check_func closesocket
+    elif check_headers winsock2.h ; then
+        check_func_headers winsock2.h closesocket -lws2 &&
+            network_extralibs="-lws2" ||
+        { check_func_headers winsock2.h closesocket -lws2_32 &&
+            network_extralibs="-lws2_32"; } || disable winsock2_h network
+        check_func_headers ws2tcpip.h getaddrinfo $network_extralibs
+
+        check_type ws2tcpip.h socklen_t
+        check_type ws2tcpip.h "struct addrinfo"
+        check_type ws2tcpip.h "struct group_source_req"
+        check_type ws2tcpip.h "struct ip_mreq_source"
+        check_type ws2tcpip.h "struct ipv6_mreq"
+        check_type winsock2.h "struct pollfd"
+        check_struct winsock2.h "struct sockaddr" sa_len
+        check_type ws2tcpip.h "struct sockaddr_in6"
+        check_type ws2tcpip.h "struct sockaddr_storage"
+    else
+        disable network
+    fi
+fi
+
+check_builtin atomic_cas_ptr atomic.h "void **ptr; void *oldval, *newval; atomic_cas_ptr(ptr, oldval, newval)"
+check_builtin machine_rw_barrier mbarrier.h "__machine_rw_barrier()"
+check_builtin MemoryBarrier windows.h "MemoryBarrier()"
+check_builtin sync_val_compare_and_swap "" "int *ptr; int oldval, newval; __sync_val_compare_and_swap(ptr, oldval, newval)"
+check_builtin gmtime_r time.h "time_t *time; struct tm *tm; gmtime_r(time, tm)"
+check_builtin localtime_r time.h "time_t *time; struct tm *tm; localtime_r(time, tm)"
+
+check_builtin float16 "" "_Float16 f16var"
+if enabled float16; then
+    if enabled x86; then
+        test_cpp_condition stddef.h "defined(__F16C__)" && enable fast_float16
+    elif enabled arm || enabled aarch64; then
+        enable fast_float16
+    fi
+fi
+
+case "$custom_allocator" in
+    jemalloc)
+        # jemalloc by default does not use a prefix
+        require libjemalloc jemalloc/jemalloc.h malloc -ljemalloc
+    ;;
+    tcmalloc)
+        require_pkg_config libtcmalloc libtcmalloc gperftools/tcmalloc.h tc_malloc
+        malloc_prefix=tc_
+    ;;
+esac
+
+check_func_headers malloc.h _aligned_malloc     && enable aligned_malloc
+check_func  ${malloc_prefix}memalign            && enable memalign
+check_func  ${malloc_prefix}posix_memalign      && enable posix_memalign
+
+check_func  access
+check_func_headers stdlib.h arc4random
+check_lib   clock_gettime time.h clock_gettime || check_lib clock_gettime time.h clock_gettime -lrt
+check_func  fcntl
+check_func  fork
+check_func  gethrtime
+check_func  getopt
+check_func  getrusage
+check_func  gettimeofday
+check_func  isatty
+check_func  mkstemp
+check_func  mmap
+check_func  mprotect
+# Solaris has nanosleep in -lrt, OpenSolaris no longer needs that
+check_func_headers time.h nanosleep || check_lib nanosleep time.h nanosleep -lrt
+check_func_headers sys/prctl.h prctl
+check_func  sched_getaffinity
+check_func  setrlimit
+check_struct "sys/stat.h" "struct stat" st_mtim.tv_nsec -D_BSD_SOURCE
+check_func  strerror_r
+check_func  sysconf
+check_func  sysctl
+check_func  usleep
+
+check_func_headers conio.h kbhit
+check_func_headers io.h setmode
+check_func_headers lzo/lzo1x.h lzo1x_999_compress
+check_func_headers mach/mach_time.h mach_absolute_time
+check_func_headers stdlib.h getenv
+check_func_headers sys/stat.h lstat
+check_func_headers sys/auxv.h getauxval
+
+check_func_headers windows.h GetModuleHandle
+check_func_headers windows.h GetProcessAffinityMask
+check_func_headers windows.h GetProcessTimes
+check_func_headers windows.h GetStdHandle
+check_func_headers windows.h GetSystemTimeAsFileTime
+check_func_headers windows.h LoadLibrary
+check_func_headers windows.h MapViewOfFile
+check_func_headers windows.h PeekNamedPipe
+check_func_headers windows.h SetConsoleTextAttribute
+check_func_headers windows.h SetConsoleCtrlHandler
+check_func_headers windows.h SetDllDirectory
+check_func_headers windows.h Sleep
+check_func_headers windows.h VirtualAlloc
+check_func_headers glob.h glob
+
+if enabled xlib; then
+    check_pkg_config xlib_x11 x11 "X11/Xlib.h" XPending ||
+    check_lib xlib_x11 "X11/Xlib.h" XPending -lX11 ||
+        disable xlib
+
+    check_pkg_config xlib_xext xext "X11/Xlib.h X11/extensions/XShm.h" XShmAttach ||
+    check_lib xlib_xext "X11/Xlib.h X11/extensions/XShm.h" XShmAttach -lXext ||
+        disable xlib
+
+    check_pkg_config xlib_xv xv "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute ||
+    check_lib xlib_xv "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv ||
+        disable xlib
+fi
+
+check_headers direct.h
+check_headers dirent.h
+check_headers dxgidebug.h
+check_headers dxva.h
+check_headers dxva2api.h -D_WIN32_WINNT=0x0600
+check_headers io.h
+enabled libdrm &&
+    check_headers linux/dma-buf.h
+
+check_headers linux/perf_event.h
+check_headers libcrystalhd/libcrystalhd_if.h
+check_headers malloc.h
+check_headers mftransform.h
+check_headers net/udplite.h
+check_headers poll.h
+check_headers sys/param.h
+check_headers sys/resource.h
+check_headers sys/select.h
+check_headers sys/time.h
+check_headers sys/un.h
+check_headers termios.h
+check_headers unistd.h
+check_headers valgrind/valgrind.h
+check_func_headers VideoToolbox/VTCompressionSession.h VTCompressionSessionPrepareToEncodeFrames -framework VideoToolbox
+check_headers windows.h
+check_headers asm/types.h
+
+# it seems there are versions of clang in some distros that try to use the
+# gcc headers, which explodes for stdatomic
+# so we also check that atomics actually work here
+#
+# some configurations also require linking to libatomic, so try
+# both with -latomic and without
+for LATOMIC in "-latomic" ""; do
+    check_builtin stdatomic stdatomic.h                                                 \
+        "atomic_int foo, bar = ATOMIC_VAR_INIT(-1); atomic_store(&foo, 0); foo += bar"  \
+        $LATOMIC && eval stdatomic_extralibs="\$LATOMIC" && break
+done
+
+check_lib advapi32 "windows.h"            RegCloseKey          -ladvapi32
+check_lib bcrypt   "windows.h bcrypt.h"   BCryptGenRandom      -lbcrypt &&
+    check_cpp_condition bcrypt bcrypt.h "defined BCRYPT_RNG_ALGORITHM"
+check_lib ole32    "windows.h"            CoTaskMemFree        -lole32
+check_lib shell32  "windows.h shellapi.h" CommandLineToArgvW   -lshell32
+check_lib psapi    "windows.h psapi.h"    GetProcessMemoryInfo -lpsapi
+
+check_lib android android/native_window.h ANativeWindow_acquire -landroid
+check_lib mediandk "stdint.h media/NdkImage.h" AImage_delete -lmediandk
+check_lib camera2ndk "stdbool.h stdint.h camera/NdkCameraManager.h" ACameraManager_create -lcamera2ndk
+
+enabled appkit       && check_apple_framework AppKit
+enabled audiotoolbox && check_apple_framework AudioToolbox
+enabled avfoundation && check_apple_framework AVFoundation
+enabled coreimage    && check_apple_framework CoreImage
+enabled metal        && check_apple_framework Metal
+enabled videotoolbox && check_apple_framework VideoToolbox
+
+check_apple_framework CoreFoundation
+check_apple_framework CoreMedia
+check_apple_framework CoreVideo
+check_apple_framework CoreAudio
+
+enabled avfoundation && {
+    disable coregraphics applicationservices
+    check_lib coregraphics        CoreGraphics/CoreGraphics.h               CGGetActiveDisplayList "-framework CoreGraphics" ||
+    check_lib applicationservices ApplicationServices/ApplicationServices.h CGGetActiveDisplayList "-framework ApplicationServices"; }
+
+enabled videotoolbox && {
+    check_lib coreservices CoreServices/CoreServices.h UTGetOSTypeFromString "-framework CoreServices"
+    check_func_headers CoreMedia/CMFormatDescription.h kCMVideoCodecType_HEVC "-framework CoreMedia"
+    check_func_headers CoreMedia/CMFormatDescription.h kCMVideoCodecType_HEVCWithAlpha "-framework CoreMedia"
+    check_func_headers CoreMedia/CMFormatDescription.h kCMVideoCodecType_VP9 "-framework CoreMedia"
+    check_func_headers CoreVideo/CVPixelBuffer.h kCVPixelFormatType_420YpCbCr10BiPlanarVideoRange "-framework CoreVideo"
+    check_func_headers CoreVideo/CVPixelBuffer.h kCVPixelFormatType_422YpCbCr8BiPlanarVideoRange "-framework CoreVideo"
+    check_func_headers CoreVideo/CVPixelBuffer.h kCVPixelFormatType_422YpCbCr10BiPlanarVideoRange "-framework CoreVideo"
+    check_func_headers CoreVideo/CVPixelBuffer.h kCVPixelFormatType_422YpCbCr16BiPlanarVideoRange "-framework CoreVideo"
+    check_func_headers CoreVideo/CVPixelBuffer.h kCVPixelFormatType_444YpCbCr8BiPlanarVideoRange "-framework CoreVideo"
+    check_func_headers CoreVideo/CVPixelBuffer.h kCVPixelFormatType_444YpCbCr10BiPlanarVideoRange "-framework CoreVideo"
+    check_func_headers CoreVideo/CVPixelBuffer.h kCVPixelFormatType_444YpCbCr16BiPlanarVideoRange "-framework CoreVideo"
+    check_func_headers CoreVideo/CVImageBuffer.h kCVImageBufferTransferFunction_SMPTE_ST_2084_PQ "-framework CoreVideo"
+    check_func_headers CoreVideo/CVImageBuffer.h kCVImageBufferTransferFunction_ITU_R_2100_HLG "-framework CoreVideo"
+    check_func_headers CoreVideo/CVImageBuffer.h kCVImageBufferTransferFunction_Linear "-framework CoreVideo"
+    check_func_headers CoreVideo/CVImageBuffer.h kCVImageBufferYCbCrMatrix_ITU_R_2020 "-framework CoreVideo"
+    check_func_headers CoreVideo/CVImageBuffer.h kCVImageBufferColorPrimaries_ITU_R_2020 "-framework CoreVideo"
+    check_func_headers CoreVideo/CVImageBuffer.h kCVImageBufferTransferFunction_ITU_R_2020 "-framework CoreVideo"
+    check_func_headers CoreVideo/CVImageBuffer.h kCVImageBufferTransferFunction_SMPTE_ST_428_1 "-framework CoreVideo"
+}
+
+enabled metal && test_cmd $metalcc -v || disable metal
+
+check_struct "sys/time.h sys/resource.h" "struct rusage" ru_maxrss
+
+check_type "windows.h dxva.h" "DXVA_PicParams_AV1" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
+check_type "windows.h dxva.h" "DXVA_PicParams_HEVC" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
+check_type "windows.h dxva.h" "DXVA_PicParams_VP9" -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -D_CRT_BUILD_DESKTOP_APP=0
+check_type "windows.h dxgi1_2.h" "DXGI_OUTDUPL_FRAME_INFO"
+check_type "windows.h dxgi1_2.h" "IDXGIOutput1"
+check_type "windows.h dxgi1_5.h" "IDXGIOutput5"
+check_type "windows.h d3d11.h" "ID3D11VideoDecoder"
+check_type "windows.h d3d11.h" "ID3D11VideoContext"
+check_type "windows.h" "DPI_AWARENESS_CONTEXT" -D_WIN32_WINNT=0x0A00
+check_type "d3d9.h dxva2api.h" DXVA2_ConfigPictureDecode -D_WIN32_WINNT=0x0602
+check_func_headers mfapi.h MFCreateAlignedMemoryBuffer -lmfplat
+
+check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
+check_type "vdpau/vdpau.h" "VdpPictureInfoVP9"
+check_type "vdpau/vdpau.h" "VdpPictureInfoAV1"
+
+if [ -z "$nvccflags" ]; then
+    nvccflags=$nvccflags_default
+fi
+
+nvccflags="$nvccflags -std=c++11"
+
+if enabled x86_64 || enabled ppc64 || enabled aarch64; then
+    nvccflags="$nvccflags -m64"
+else
+    nvccflags="$nvccflags -m32"
+fi
+
+if enabled cuda_nvcc; then
+    nvccflags="$nvccflags -ptx"
+else
+    nvccflags="$nvccflags -S -nocudalib -nocudainc --cuda-device-only -Wno-c++11-narrowing -include ${source_link}/compat/cuda/cuda_runtime.h"
+    check_nvcc cuda_llvm
+fi
+
+if ! disabled ffnvcodec; then
+    ffnv_hdr_list="ffnvcodec/nvEncodeAPI.h ffnvcodec/dynlink_cuda.h ffnvcodec/dynlink_cuviddec.h ffnvcodec/dynlink_nvcuvid.h"
+    check_pkg_config ffnvcodec "ffnvcodec >= 12.0.16.0" "$ffnv_hdr_list" "" || \
+      check_pkg_config ffnvcodec "ffnvcodec >= 11.1.5.2 ffnvcodec < 12.0" "$ffnv_hdr_list" "" || \
+      check_pkg_config ffnvcodec "ffnvcodec >= 11.0.10.2 ffnvcodec < 11.1" "$ffnv_hdr_list" "" || \
+      check_pkg_config ffnvcodec "ffnvcodec >= 8.1.24.14 ffnvcodec < 8.2" "$ffnv_hdr_list" ""
+fi
+
+if enabled_all libglslang libshaderc; then
+    die "ERROR: libshaderc and libglslang are mutually exclusive, if in doubt, disable libglslang"
+fi
+
+check_cpp_condition winrt windows.h "!WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)"
+
+if ! disabled w32threads && ! enabled pthreads; then
+    check_func_headers "windows.h process.h" _beginthreadex &&
+        check_type "windows.h" CONDITION_VARIABLE &&
+        check_type "windows.h" INIT_ONCE &&
+        enable w32threads || disable w32threads
+    if ! enabled w32threads && enabled winrt; then
+        check_func_headers "windows.h" CreateThread &&
+            enable w32threads || disable w32threads
+    fi
+fi
+
+# check for some common methods of building with pthread support
+# do this before the optional library checks as some of them require pthreads
+if ! disabled pthreads && ! enabled w32threads && ! enabled os2threads; then
+    if check_lib pthreads pthread.h pthread_join   -pthread &&
+       check_lib pthreads pthread.h pthread_create -pthread; then
+        add_cflags -pthread
+    elif check_lib pthreads pthread.h pthread_join   -pthreads &&
+         check_lib pthreads pthread.h pthread_create -pthreads; then
+        add_cflags -pthreads
+    elif check_lib pthreads pthread.h pthread_join   -ldl -pthread &&
+         check_lib pthreads pthread.h pthread_create -ldl -pthread; then
+        add_cflags -ldl -pthread
+    elif check_lib pthreads pthread.h pthread_join   -lpthreadGC2 &&
+         check_lib pthreads pthread.h pthread_create -lpthreadGC2; then
+        :
+    elif check_lib pthreads pthread.h pthread_join   -lpthread &&
+         check_lib pthreads pthread.h pthread_create -lpthread; then
+        :
+    elif check_func pthread_join && check_func pthread_create; then
+        enable pthreads
+    fi
+    check_cc pthreads "pthread.h" "static pthread_mutex_t atomic_lock = PTHREAD_MUTEX_INITIALIZER"
+
+    if enabled pthreads; then
+        check_builtin sem_timedwait semaphore.h "sem_t *s; sem_init(s,0,0); sem_timedwait(s,0); sem_destroy(s)" $pthreads_extralibs
+        check_func pthread_cancel $pthreads_extralibs
+    fi
+fi
+
+enabled  zlib && { check_pkg_config zlib zlib "zlib.h" zlibVersion ||
+                   check_lib zlib   zlib.h      zlibVersion    -lz; }
+enabled bzlib && check_lib bzlib bzlib.h BZ2_bzlibVersion    -lbz2
+enabled  lzma && check_lib lzma   lzma.h lzma_version_number -llzma
+
+enabled zlib && test_exec $zlib_extralibs <<EOF && enable zlib_gzip
+#include <zlib.h>
+int main(void) {
+    if (zlibCompileFlags() & (1 << 17)) return 1;
+    return 0;
+}
+EOF
+
+[ -x "$(command -v gzip)" ] && enable gzip
+
+enabled zlib_gzip && enabled gzip || disable ptx_compression
+
+# On some systems dynamic loading requires no extra linker flags
+check_lib libdl dlfcn.h "dlopen dlsym" || check_lib libdl dlfcn.h "dlopen dlsym" -ldl
+
+check_lib libm math.h sin -lm
+
+atan2f_args=2
+copysign_args=2
+hypot_args=2
+ldexpf_args=2
+powf_args=2
+
+for func in $MATH_FUNCS; do
+    eval check_mathfunc $func \${${func}_args:-1} $libm_extralibs
+done
+
+# these are off by default, so fail if requested and not available
+enabled avisynth          && { require_headers "avisynth/avisynth_c.h avisynth/avs/version.h" &&
+                               { test_cpp_condition avisynth/avs/version.h "AVS_MAJOR_VER >= 3 && AVS_MINOR_VER >= 7 && AVS_BUGFIX_VER >= 1 || AVS_MAJOR_VER >= 3 && AVS_MINOR_VER > 7 || AVS_MAJOR_VER > 3" ||
+                                 die "ERROR: AviSynth+ header version must be >= 3.7.1"; } }
+enabled cuda_nvcc         && { check_nvcc cuda_nvcc || die "ERROR: failed checking for nvcc."; }
+enabled chromaprint       && { check_pkg_config chromaprint libchromaprint "chromaprint.h" chromaprint_get_version ||
+                               require chromaprint chromaprint.h chromaprint_get_version -lchromaprint; }
+enabled decklink          && { require_headers DeckLinkAPI.h &&
+                               { test_cpp_condition DeckLinkAPIVersion.h "BLACKMAGIC_DECKLINK_API_VERSION >= 0x0a0b0000" || die "ERROR: Decklink API version must be >= 10.11"; } }
+enabled frei0r            && require_headers "frei0r.h"
+enabled gmp               && require gmp gmp.h mpz_export -lgmp
+enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init
+enabled jni               && { [ $target_os = "android" ] && check_headers jni.h && enabled pthreads || die "ERROR: jni not found"; }
+enabled ladspa            && require_headers "ladspa.h dlfcn.h"
+enabled lcms2             && require_pkg_config lcms2 "lcms2 >= 2.13" lcms2.h cmsCreateContext
+enabled libaom            && require_pkg_config libaom "aom >= 1.0.0" aom/aom_codec.h aom_codec_version
+enabled libaribb24        && { check_pkg_config libaribb24 "aribb24 > 1.0.3" "aribb24/aribb24.h" arib_instance_new ||
+                               { enabled gpl && require_pkg_config libaribb24 aribb24 "aribb24/aribb24.h" arib_instance_new; } ||
+                               die "ERROR: libaribb24 requires version higher than 1.0.3 or --enable-gpl."; }
+enabled lv2               && require_pkg_config lv2 lilv-0 "lilv/lilv.h" lilv_world_new
+enabled libiec61883       && require libiec61883 libiec61883/iec61883.h iec61883_cmp_connect -lraw1394 -lavc1394 -lrom1394 -liec61883
+enabled libass            && require_pkg_config libass "libass >= 0.11.0" ass/ass.h ass_library_init
+enabled libbluray         && require_pkg_config libbluray libbluray libbluray/bluray.h bd_open
+enabled libbs2b           && require_pkg_config libbs2b libbs2b bs2b.h bs2b_open
+enabled libcelt           && require libcelt celt/celt.h celt_decode -lcelt0 &&
+                             { check_lib libcelt celt/celt.h celt_decoder_create_custom -lcelt0 ||
+                               die "ERROR: libcelt must be installed and version must be >= 0.11.0."; }
+enabled libcaca           && require_pkg_config libcaca caca caca.h caca_create_canvas
+enabled libcodec2         && require libcodec2 codec2/codec2.h codec2_create -lcodec2
+enabled libdav1d          && require_pkg_config libdav1d "dav1d >= 0.5.0" "dav1d/dav1d.h" dav1d_version
+enabled libdavs2          && require_pkg_config libdavs2 "davs2 >= 1.6.0" davs2.h davs2_decoder_open
+enabled libdc1394         && require_pkg_config libdc1394 libdc1394-2 dc1394/dc1394.h dc1394_new
+enabled libdrm            && require_pkg_config libdrm libdrm xf86drm.h drmGetVersion
+enabled libfdk_aac        && { check_pkg_config libfdk_aac fdk-aac "fdk-aac/aacenc_lib.h" aacEncOpen ||
+                               { require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac &&
+                                 warn "using libfdk without pkg-config"; } }
+flite_extralibs="-lflite_cmu_time_awb -lflite_cmu_us_awb -lflite_cmu_us_kal -lflite_cmu_us_kal16 -lflite_cmu_us_rms -lflite_cmu_us_slt -lflite_usenglish -lflite_cmulex -lflite"
+enabled libflite          && require libflite "flite/flite.h" flite_init $flite_extralibs
+enabled fontconfig        && enable libfontconfig
+enabled libfontconfig     && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit
+enabled libfreetype       && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType
+enabled libfribidi        && require_pkg_config libfribidi fribidi fribidi.h fribidi_version_info
+enabled libglslang && { check_lib spirv_compiler glslang/Include/glslang_c_interface.h glslang_initialize_process \
+                            -lglslang -lMachineIndependent -lOSDependent -lHLSL -lOGLCompiler -lGenericCodeGen \
+                            -lSPVRemapper -lSPIRV -lSPIRV-Tools-opt -lSPIRV-Tools -lpthread -lstdc++ -lm ||
+                        require spirv_compiler glslang/Include/glslang_c_interface.h glslang_initialize_process \
+                            -lglslang -lOSDependent -lHLSL -lOGLCompiler \
+                            -lSPVRemapper -lSPIRV -lSPIRV-Tools-opt -lSPIRV-Tools -lpthread -lstdc++ -lm; }
+enabled libgme            && { check_pkg_config libgme libgme gme/gme.h gme_new_emu ||
+                               require libgme gme/gme.h gme_new_emu -lgme -lstdc++; }
+enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
+                                   check_lib libgsm "${gsm_hdr}" gsm_create -lgsm && break;
+                               done || die "ERROR: libgsm not found"; }
+enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc $pthreads_extralibs
+enabled libjxl            && require_pkg_config libjxl "libjxl >= 0.7.0" jxl/decode.h JxlDecoderVersion &&
+                             require_pkg_config libjxl_threads "libjxl_threads >= 0.7.0" jxl/thread_parallel_runner.h JxlThreadParallelRunner
+enabled libklvanc         && require libklvanc libklvanc/vanc.h klvanc_context_create -lklvanc
+enabled libkvazaar        && require_pkg_config libkvazaar "kvazaar >= 0.8.1" kvazaar.h kvz_api_get
+enabled liblensfun        && require_pkg_config liblensfun lensfun lensfun.h lf_db_new
+
+if enabled libmfx && enabled libvpl; then
+   die "ERROR: can not use libmfx and libvpl together"
+# While it may appear that require is being used as a pkg-config
+# fallback for libmfx, it is actually being used to detect a different
+# installation route altogether.  If libmfx is installed via the Intel
+# Media SDK or Intel Media Server Studio, these don't come with
+# pkg-config support.  Instead, users should make sure that the build
+# can find the libraries and headers through other means.
+elif enabled libmfx; then
+    { check_pkg_config libmfx "libmfx >= 1.28 libmfx < 2.0" "mfxvideo.h" MFXInit ||
+# Some old versions of libmfx have the following settings in libmfx.pc:
+#   includedir=/usr/include
+#   Cflags: -I${includedir}
+# So add -I${includedir}/mfx to CFLAGS
+      { check_pkg_config libmfx "libmfx >= 1.28 libmfx < 2.0" "mfx/mfxvideo.h" MFXInit && add_cflags -I${libmfx_incdir}/mfx; } ||
+      { require libmfx "mfxvideo.h mfxdefs.h" MFXInit "-llibmfx $advapi32_extralibs" &&
+        { test_cpp_condition mfxdefs.h "MFX_VERSION >= 1028 && MFX_VERSION < 2000" || die "ERROR: libmfx version must be >= 1.28 and < 2.0"; }  &&
+        warn "using libmfx without pkg-config"; } } &&
+    warn "build FFmpeg against libmfx 1.x, obsolete features of libmfx such as OPAQUE memory,\n"\
+         "multi-frame encode, user plugins and LA_EXT rate control mode are enabled"
+elif enabled libvpl; then
+# Consider pkg-config only. The name of libmfx is still passed to check_pkg_config function for --enable-libvpl option
+# because QSV has dependency on libmfx, we can use the same dependency if using libmfx in this check. The package name
+# is extracted from "vpl >= 2.6"
+    check_pkg_config libmfx "vpl >= 2.6" "mfxvideo.h mfxdispatcher.h" MFXLoad || \
+            die "ERROR: libvpl >= 2.6 not found"
+fi
+
+if enabled libmfx; then
+   check_cc MFX_CODEC_VP9 "mfxdefs.h mfxstructures.h" "MFX_CODEC_VP9"
+fi
+
+enabled libmodplug        && require_pkg_config libmodplug libmodplug libmodplug/modplug.h ModPlug_Load
+enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame $libm_extralibs
+enabled libmysofa         && { check_pkg_config libmysofa libmysofa mysofa.h mysofa_neighborhood_init_withstepdefine ||
+                               require libmysofa mysofa.h mysofa_neighborhood_init_withstepdefine -lmysofa $zlib_extralibs; }
+enabled libnpp            && { check_lib libnpp npp.h nppGetLibVersion -lnppig -lnppicc -lnppc -lnppidei -lnppif ||
+                               check_lib libnpp npp.h nppGetLibVersion -lnppi -lnppif -lnppc -lnppidei ||
+                               die "ERROR: libnpp not found"; }
+enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
+enabled libopencore_amrwb && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb
+enabled libopencv         && { check_headers opencv2/core/core_c.h &&
+                               { check_pkg_config libopencv opencv opencv2/core/core_c.h cvCreateImageHeader ||
+                                 require libopencv opencv2/core/core_c.h cvCreateImageHeader -lopencv_core -lopencv_imgproc; } ||
+                               require_pkg_config libopencv opencv opencv/cxcore.h cvCreateImageHeader; }
+enabled libopenh264       && require_pkg_config libopenh264 openh264 wels/codec_api.h WelsGetCodecVersion
+enabled libopenjpeg       && { check_pkg_config libopenjpeg "libopenjp2 >= 2.1.0" openjpeg.h opj_version ||
+                               { require_pkg_config libopenjpeg "libopenjp2 >= 2.1.0" openjpeg.h opj_version -DOPJ_STATIC && add_cppflags -DOPJ_STATIC; } }
+enabled libopenmpt        && require_pkg_config libopenmpt "libopenmpt >= 0.2.6557" libopenmpt/libopenmpt.h openmpt_module_create -lstdc++ && append libopenmpt_extralibs "-lstdc++"
+enabled libopenvino       && require libopenvino c_api/ie_c_api.h ie_c_api_version -linference_engine_c_api
+enabled libopus           && {
+    enabled libopus_decoder && {
+        require_pkg_config libopus opus opus_multistream.h opus_multistream_decoder_create
+    }
+    enabled libopus_encoder && {
+        require_pkg_config libopus opus opus_multistream.h opus_multistream_surround_encoder_create
+    }
+}
+enabled libplacebo        && require_pkg_config libplacebo "libplacebo >= 4.192.0" libplacebo/vulkan.h pl_vulkan_create
+enabled libpulse          && require_pkg_config libpulse libpulse pulse/pulseaudio.h pa_context_new
+enabled librabbitmq       && require_pkg_config librabbitmq "librabbitmq >= 0.7.1" amqp.h amqp_new_connection
+enabled librav1e          && require_pkg_config librav1e "rav1e >= 0.5.0" rav1e.h rav1e_context_new
+enabled librist           && require_pkg_config librist "librist >= 0.2.7" librist/librist.h rist_receiver_create
+enabled librsvg           && require_pkg_config librsvg librsvg-2.0 librsvg-2.0/librsvg/rsvg.h rsvg_handle_render_cairo
+enabled librtmp           && require_pkg_config librtmp librtmp librtmp/rtmp.h RTMP_Socket
+enabled librubberband     && require_pkg_config librubberband "rubberband >= 1.8.1" rubberband/rubberband-c.h rubberband_new -lstdc++ && append librubberband_extralibs "-lstdc++"
+enabled libshaderc        && require_pkg_config spirv_compiler "shaderc >= 2019.1" shaderc/shaderc.h shaderc_compiler_initialize
+enabled libshine          && require_pkg_config libshine shine shine/layer3.h shine_encode_buffer
+enabled libsmbclient      && { check_pkg_config libsmbclient smbclient libsmbclient.h smbc_init ||
+                               require libsmbclient libsmbclient.h smbc_init -lsmbclient; }
+enabled libsnappy         && require libsnappy snappy-c.h snappy_compress -lsnappy -lstdc++
+enabled libsoxr           && require libsoxr soxr.h soxr_create -lsoxr
+enabled libssh            && require_pkg_config libssh libssh libssh/sftp.h sftp_init
+enabled libspeex          && require_pkg_config libspeex speex speex/speex.h speex_decoder_init
+enabled libsrt            && require_pkg_config libsrt "srt >= 1.3.0" srt/srt.h srt_socket
+enabled libsvtav1         && require_pkg_config libsvtav1 "SvtAv1Enc >= 0.9.0" EbSvtAv1Enc.h svt_av1_enc_init_handle
+enabled libtensorflow     && require libtensorflow tensorflow/c/c_api.h TF_Version -ltensorflow
+enabled libtesseract      && require_pkg_config libtesseract tesseract tesseract/capi.h TessBaseAPICreate
+enabled libtheora         && require libtheora theora/theoraenc.h th_info_init -ltheoraenc -ltheoradec -logg
+enabled libtls            && require_pkg_config libtls libtls tls.h tls_configure
+enabled libtwolame        && require libtwolame twolame.h twolame_init -ltwolame &&
+                             { check_lib libtwolame twolame.h twolame_encode_buffer_float32_interleaved -ltwolame ||
+                               die "ERROR: libtwolame must be installed and version must be >= 0.3.10"; }
+enabled libuavs3d         && require_pkg_config libuavs3d "uavs3d >= 1.1.41" uavs3d.h uavs3d_decode
+enabled libv4l2           && require_pkg_config libv4l2 libv4l2 libv4l2.h v4l2_ioctl
+enabled libvidstab        && require_pkg_config libvidstab "vidstab >= 0.98" vid.stab/libvidstab.h vsMotionDetectInit
+enabled libvmaf           && require_pkg_config libvmaf "libvmaf >= 2.0.0" libvmaf.h vmaf_init
+enabled libvo_amrwbenc    && require libvo_amrwbenc vo-amrwbenc/enc_if.h E_IF_init -lvo-amrwbenc
+enabled libvorbis         && require_pkg_config libvorbis vorbis vorbis/codec.h vorbis_info_init &&
+                             require_pkg_config libvorbisenc vorbisenc vorbis/vorbisenc.h vorbis_encode_init
+
+enabled libvpx            && {
+    enabled libvpx_vp8_decoder && {
+        check_pkg_config libvpx_vp8_decoder "vpx >= 1.4.0" "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp8_dx ||
+            check_lib libvpx_vp8_decoder "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp8_dx VPX_IMG_FMT_HIGHBITDEPTH" "-lvpx $libm_extralibs $pthreads_extralibs"
+    }
+    enabled libvpx_vp8_encoder && {
+        check_pkg_config libvpx_vp8_encoder "vpx >= 1.4.0" "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp8_cx ||
+            check_lib libvpx_vp8_encoder "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_vp8_cx VPX_IMG_FMT_HIGHBITDEPTH" "-lvpx $libm_extralibs $pthreads_extralibs"
+    }
+    enabled libvpx_vp9_decoder && {
+        check_pkg_config libvpx_vp9_decoder "vpx >= 1.4.0" "vpx/vpx_decoder.h vpx/vp8dx.h" vpx_codec_vp9_dx ||
+            check_lib libvpx_vp9_decoder "vpx/vpx_decoder.h vpx/vp8dx.h" "vpx_codec_vp9_dx VPX_IMG_FMT_HIGHBITDEPTH" "-lvpx $libm_extralibs $pthreads_extralibs"
+    }
+    enabled libvpx_vp9_encoder && {
+        check_pkg_config libvpx_vp9_encoder "vpx >= 1.4.0" "vpx/vpx_encoder.h vpx/vp8cx.h" vpx_codec_vp9_cx ||
+            check_lib libvpx_vp9_encoder "vpx/vpx_encoder.h vpx/vp8cx.h" "vpx_codec_vp9_cx VPX_IMG_FMT_HIGHBITDEPTH" "-lvpx $libm_extralibs $pthreads_extralibs"
+    }
+    if disabled_all libvpx_vp8_decoder libvpx_vp9_decoder libvpx_vp8_encoder libvpx_vp9_encoder; then
+        die "libvpx enabled but no supported decoders found"
+    fi
+}
+
+enabled libwebp           && {
+    enabled libwebp_encoder      && require_pkg_config libwebp "libwebp >= 0.2.0" webp/encode.h WebPGetEncoderVersion
+    enabled libwebp_anim_encoder && check_pkg_config libwebp_anim_encoder "libwebpmux >= 0.4.0" webp/mux.h WebPAnimEncoderOptionsInit; }
+enabled libx264           && require_pkg_config libx264 x264 "stdint.h x264.h" x264_encoder_encode &&
+                             require_cpp_condition libx264 x264.h "X264_BUILD >= 122" && {
+                             [ "$toolchain" != "msvc" ] ||
+                             require_cpp_condition libx264 x264.h "X264_BUILD >= 158"; } &&
+                             check_cpp_condition libx262 x264.h "X264_MPEG2"
+enabled libx265           && require_pkg_config libx265 x265 x265.h x265_api_get &&
+                             require_cpp_condition libx265 x265.h "X265_BUILD >= 89"
+enabled libxavs           && require libxavs "stdint.h xavs.h" xavs_encoder_encode "-lxavs $pthreads_extralibs $libm_extralibs"
+enabled libxavs2          && require_pkg_config libxavs2 "xavs2 >= 1.3.0" "stdint.h xavs2.h" xavs2_api_get
+enabled libxvid           && require libxvid xvid.h xvid_global -lxvidcore
+enabled libzimg           && require_pkg_config libzimg "zimg >= 2.7.0" zimg.h zimg_get_api_version
+enabled libzmq            && require_pkg_config libzmq "libzmq >= 4.2.1" zmq.h zmq_ctx_new
+enabled libzvbi           && require_pkg_config libzvbi zvbi-0.2 libzvbi.h vbi_decoder_new &&
+                             { test_cpp_condition libzvbi.h "VBI_VERSION_MAJOR > 0 || VBI_VERSION_MINOR > 2 || VBI_VERSION_MINOR == 2 && VBI_VERSION_MICRO >= 28" ||
+                               enabled gpl || die "ERROR: libzvbi requires version 0.2.28 or --enable-gpl."; }
+enabled libxml2           && require_pkg_config libxml2 libxml-2.0 libxml2/libxml/xmlversion.h xmlCheckVersion
+enabled mbedtls           && { check_pkg_config mbedtls mbedtls mbedtls/x509_crt.h mbedtls_x509_crt_init ||
+                               check_pkg_config mbedtls mbedtls mbedtls/ssl.h mbedtls_ssl_init ||
+                               check_lib mbedtls mbedtls/ssl.h mbedtls_ssl_init -lmbedtls -lmbedx509 -lmbedcrypto ||
+                               die "ERROR: mbedTLS not found"; }
+enabled mediacodec        && { enabled jni || die "ERROR: mediacodec requires --enable-jni"; }
+enabled mmal              && { check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
+                               { ! enabled cross_compile &&
+                                 add_cflags -isystem/opt/vc/include/ -isystem/opt/vc/include/interface/vmcs_host/linux -isystem/opt/vc/include/interface/vcos/pthreads -fgnu89-inline &&
+                                 add_ldflags -L/opt/vc/lib/ &&
+                                 check_lib mmal interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host; } ||
+                               die "ERROR: mmal not found" &&
+                               check_func_headers interface/mmal/mmal.h "MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS"; }
+enabled openal            && { check_pkg_config openal "openal >= 1.1" "AL/al.h" alGetError ||
+                               { for al_extralibs in "${OPENAL_LIBS}" "-lopenal" "-lOpenAL32"; do
+                               check_lib openal 'AL/al.h' alGetError "${al_extralibs}" && break; done } ||
+                               die "ERROR: openal not found"; } &&
+                             { test_cpp_condition "AL/al.h" "defined(AL_VERSION_1_1)" ||
+                               die "ERROR: openal must be installed and version must be 1.1 or compatible"; }
+enabled opencl            && { check_pkg_config opencl OpenCL CL/cl.h clEnqueueNDRangeKernel ||
+                               check_lib opencl OpenCL/cl.h clEnqueueNDRangeKernel -Wl,-framework,OpenCL ||
+                               check_lib opencl CL/cl.h clEnqueueNDRangeKernel -lOpenCL ||
+                               die "ERROR: opencl not found"; } &&
+                             { test_cpp_condition "OpenCL/cl.h" "defined(CL_VERSION_1_2)" ||
+                               test_cpp_condition "CL/cl.h" "defined(CL_VERSION_1_2)" ||
+                               die "ERROR: opencl must be installed and version must be 1.2 or compatible"; }
+enabled opengl            && { check_lib opengl GL/glx.h glXGetProcAddress "-lGL" ||
+                               check_lib opengl windows.h wglGetProcAddress "-lopengl32 -lgdi32" ||
+                               check_lib opengl OpenGL/gl3.h glGetError "-Wl,-framework,OpenGL" ||
+                               check_lib opengl ES2/gl.h glGetError "-isysroot=${sysroot} -Wl,-framework,OpenGLES" ||
+                               die "ERROR: opengl not found."
+                             }
+enabled omx_rpi           && { test_code cc OMX_Core.h OMX_IndexConfigBrcmVideoRequestIFrame ||
+                               { ! enabled cross_compile &&
+                                 add_cflags -isystem/opt/vc/include/IL &&
+                                 test_code cc OMX_Core.h OMX_IndexConfigBrcmVideoRequestIFrame; } ||
+                               die "ERROR: OpenMAX IL headers from raspberrypi/firmware not found"; } &&
+                             enable omx
+enabled omx               && require_headers OMX_Core.h
+enabled openssl           && { { check_pkg_config openssl "openssl >= 3.0.0" openssl/ssl.h OPENSSL_init_ssl &&
+                                 { enabled gplv3 || ! enabled gpl || enabled nonfree || die "ERROR: OpenSSL >=3.0.0 requires --enable-version3"; }; } ||
+                               { enabled gpl && ! enabled nonfree && die "ERROR: OpenSSL <3.0.0 is incompatible with the gpl"; } ||
+                               check_pkg_config openssl openssl openssl/ssl.h OPENSSL_init_ssl ||
+                               check_pkg_config openssl openssl openssl/ssl.h SSL_library_init ||
+                               check_lib openssl openssl/ssl.h OPENSSL_init_ssl -lssl -lcrypto ||
+                               check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto ||
+                               check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
+                               check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
+                               die "ERROR: openssl not found"; }
+enabled pocketsphinx      && require_pkg_config pocketsphinx pocketsphinx pocketsphinx/pocketsphinx.h ps_init
+enabled rkmpp             && { require_pkg_config rkmpp rockchip_mpp  rockchip/rk_mpi.h mpp_create &&
+                               require_pkg_config rockchip_mpp "rockchip_mpp >= 1.3.7" rockchip/rk_mpi.h mpp_create &&
+                               { enabled libdrm ||
+                                 die "ERROR: rkmpp requires --enable-libdrm"; }
+                             }
+enabled vapoursynth       && require_pkg_config vapoursynth "vapoursynth-script >= 42" VSScript.h vsscript_init
+
+
+if enabled gcrypt; then
+    GCRYPT_CONFIG="${cross_prefix}libgcrypt-config"
+    if "${GCRYPT_CONFIG}" --version > /dev/null 2>&1; then
+        gcrypt_cflags=$("${GCRYPT_CONFIG}" --cflags)
+        gcrypt_extralibs=$("${GCRYPT_CONFIG}" --libs)
+        check_func_headers gcrypt.h gcry_mpi_new $gcrypt_cflags $gcrypt_extralibs ||
+            die "ERROR: gcrypt not found"
+        add_cflags $gcrypt_cflags
+    else
+        require gcrypt gcrypt.h gcry_mpi_new -lgcrypt
+    fi
+fi
+
+if enabled sdl2; then
+    SDL2_CONFIG="${cross_prefix}sdl2-config"
+    test_pkg_config sdl2 "sdl2 >= 2.0.1 sdl2 < 3.0.0" SDL_events.h SDL_PollEvent
+    if disabled sdl2 && "${SDL2_CONFIG}" --version > /dev/null 2>&1; then
+        sdl2_cflags=$("${SDL2_CONFIG}" --cflags)
+        sdl2_extralibs=$("${SDL2_CONFIG}" --libs)
+        test_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) >= 0x020001" $sdl2_cflags &&
+        test_cpp_condition SDL.h "(SDL_MAJOR_VERSION<<16 | SDL_MINOR_VERSION<<8 | SDL_PATCHLEVEL) < 0x030000" $sdl2_cflags &&
+        check_func_headers SDL_events.h SDL_PollEvent $sdl2_extralibs $sdl2_cflags &&
+            enable sdl2
+    fi
+    if test $target_os = "mingw32"; then
+        sdl2_extralibs=$(filter_out '-mwindows' $sdl2_extralibs)
+    fi
+fi
+
+if enabled decklink; then
+    case $target_os in
+        mingw32*|mingw64*|win32|win64)
+            decklink_outdev_extralibs="$decklink_outdev_extralibs -lole32 -loleaut32"
+            decklink_indev_extralibs="$decklink_indev_extralibs -lole32 -loleaut32"
+            ;;
+    esac
+fi
+
+enabled securetransport &&
+    check_func SecIdentityCreate "-Wl,-framework,CoreFoundation -Wl,-framework,Security" &&
+    check_lib securetransport "Security/SecureTransport.h Security/Security.h" "SSLCreateContext" "-Wl,-framework,CoreFoundation -Wl,-framework,Security" ||
+        disable securetransport
+
+enabled securetransport &&
+    check_func SecItemImport "-Wl,-framework,CoreFoundation -Wl,-framework,Security"
+
+enabled schannel &&
+    check_func_headers "windows.h security.h" InitializeSecurityContext -DSECURITY_WIN32 -lsecur32 &&
+    test_cpp_condition winerror.h "defined(SEC_I_CONTEXT_EXPIRED)" &&
+    schannel_extralibs="-lsecur32" ||
+        disable schannel
+
+makeinfo --version > /dev/null 2>&1 && enable makeinfo  || disable makeinfo
+enabled makeinfo \
+    && [ 0$(makeinfo --version | grep "texinfo" | sed 's/.*texinfo[^0-9]*\([0-9]*\)\..*/\1/') -ge 5 ] \
+    && enable makeinfo_html || disable makeinfo_html
+disabled makeinfo_html && texi2html --help 2> /dev/null | grep -q 'init-file' && enable texi2html || disable texi2html
+perl -v            > /dev/null 2>&1 && enable perl      || disable perl
+pod2man --help     > /dev/null 2>&1 && enable pod2man   || disable pod2man
+rsync --help 2> /dev/null | grep -q 'contimeout' && enable rsync_contimeout || disable rsync_contimeout
+xmllint --version  > /dev/null 2>&1 && enable xmllint   || disable xmllint
+
+# check V4L2 codecs available in the API
+if enabled v4l2_m2m; then
+    check_headers linux/fb.h
+    check_headers linux/videodev2.h
+    test_code cc linux/videodev2.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
+    check_cc v4l2_m2m linux/videodev2.h "int i = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_VIDEO_M2M | V4L2_BUF_FLAG_LAST;"
+    check_cc vc1_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VC1_ANNEX_G;"
+    check_cc mpeg1_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG1;"
+    check_cc mpeg2_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG2;"
+    check_cc mpeg4_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_MPEG4;"
+    check_cc hevc_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_HEVC;"
+    check_cc h263_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_H263;"
+    check_cc h264_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_H264;"
+    check_cc vp8_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VP8;"
+    check_cc vp9_v4l2_m2m linux/videodev2.h "int i = V4L2_PIX_FMT_VP9;"
+fi
+
+check_headers sys/videoio.h
+test_code cc sys/videoio.h "struct v4l2_frmsizeenum vfse; vfse.discrete.width = 0;" && enable_sanitized struct_v4l2_frmivalenum_discrete
+
+check_lib user32 "windows.h winuser.h" GetShellWindow -luser32
+check_lib vfw32 "windows.h vfw.h" capCreateCaptureWindow -lvfw32
+# check that WM_CAP_DRIVER_CONNECT is defined to the proper value
+# w32api 3.12 had it defined wrong
+check_cpp_condition vfwcap_defines vfw.h "WM_CAP_DRIVER_CONNECT > WM_USER"
+
+check_type "dshow.h" IBaseFilter
+
+# check for ioctl_meteor.h, ioctl_bt848.h and alternatives
+check_headers "dev/bktr/ioctl_meteor.h dev/bktr/ioctl_bt848.h"                   ||
+    check_headers "machine/ioctl_meteor.h machine/ioctl_bt848.h"                 ||
+    check_headers "dev/video/meteor/ioctl_meteor.h dev/video/bktr/ioctl_bt848.h" ||
+    check_headers "dev/ic/bt8xx.h"
+
+if check_struct sys/soundcard.h audio_buf_info bytes; then
+    enable_sanitized sys/soundcard.h
+else
+    test_cc -D__BSD_VISIBLE -D__XSI_VISIBLE <<EOF && add_cppflags -D__BSD_VISIBLE -D__XSI_VISIBLE && enable_sanitized sys/soundcard.h
+    #include <sys/soundcard.h>
+    audio_buf_info abc;
+EOF
+fi
+
+enabled alsa && { check_pkg_config alsa alsa "alsa/asoundlib.h" snd_pcm_htimestamp ||
+                  check_lib alsa alsa/asoundlib.h snd_pcm_htimestamp -lasound; }
+
+enabled libjack &&
+    require_pkg_config libjack jack jack/jack.h jack_port_get_latency_range
+
+enabled sndio && { check_pkg_config sndio sndio "sndio.h" sio_open ||
+                   check_lib sndio sndio.h sio_open -lsndio; }
+
+if enabled libcdio; then
+    check_pkg_config libcdio libcdio_paranoia "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open ||
+    check_pkg_config libcdio libcdio_paranoia "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open ||
+    check_lib libcdio "cdio/cdda.h cdio/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
+    check_lib libcdio "cdio/paranoia/cdda.h cdio/paranoia/paranoia.h" cdio_cddap_open -lcdio_paranoia -lcdio_cdda -lcdio ||
+    die "ERROR: No usable libcdio/cdparanoia found"
+fi
+
+enabled libxcb && check_pkg_config libxcb "xcb >= 1.4" xcb/xcb.h xcb_connect ||
+    disable libxcb_shm libxcb_shape libxcb_xfixes
+
+if enabled libxcb; then
+    enabled libxcb_shm    && check_pkg_config libxcb_shm    xcb-shm    xcb/shm.h    xcb_shm_attach
+    enabled libxcb_shape  && check_pkg_config libxcb_shape  xcb-shape  xcb/shape.h  xcb_shape_get_rectangles
+    enabled libxcb_xfixes && check_pkg_config libxcb_xfixes xcb-xfixes xcb/xfixes.h xcb_xfixes_get_cursor_image
+fi
+
+check_func_headers "windows.h" CreateDIBSection "$gdigrab_indev_extralibs"
+
+# d3d11va requires linking directly to dxgi and d3d11 if not building for
+# the desktop api partition
+test_cpp <<EOF && enable uwp && d3d11va_extralibs="-ldxgi -ld3d11"
+#ifdef WINAPI_FAMILY
+#include <winapifamily.h>
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#error desktop, not uwp
+#else
+// WINAPI_FAMILY_APP, WINAPI_FAMILY_PHONE_APP => UWP
+#endif
+#else
+#error no family set
+#endif
+EOF
+
+# mediafoundation requires linking directly to mfplat if building for uwp target
+enabled uwp && mediafoundation_extralibs="-lmfplat -lmfuuid -lole32 -lstrmiids" || mediafoundation_extralibs="-lmfuuid -lole32 -lstrmiids"
+
+enabled libdrm &&
+    check_pkg_config libdrm_getfb2 libdrm "xf86drmMode.h" drmModeGetFB2
+
+enabled vaapi &&
+    check_pkg_config vaapi "libva >= 0.35.0" "va/va.h" vaInitialize
+
+if enabled vaapi; then
+    check_pkg_config vaapi_drm "libva-drm" "va/va_drm.h" vaGetDisplayDRM
+
+    if enabled xlib_x11; then
+        check_pkg_config vaapi_x11 "libva-x11" "va/va_x11.h" vaGetDisplay
+    fi
+
+    check_cpp_condition vaapi_1 "va/va.h" "VA_CHECK_VERSION(1, 0, 0)"
+
+    check_type "va/va.h va/va_dec_hevc.h" "VAPictureParameterBufferHEVC"
+    check_struct "va/va.h" "VADecPictureParameterBufferVP9" bit_depth
+    check_struct "va/va.h" "VADecPictureParameterBufferAV1" bit_depth_idx
+    check_type   "va/va.h va/va_vpp.h" "VAProcFilterParameterBufferHDRToneMapping"
+    check_struct "va/va.h va/va_vpp.h" "VAProcPipelineCaps" rotation_flags
+    check_struct "va/va.h va/va_vpp.h" "VAProcPipelineCaps" blend_flags
+    check_type "va/va.h va/va_enc_hevc.h" "VAEncPictureParameterBufferHEVC"
+    check_type "va/va.h va/va_enc_jpeg.h" "VAEncPictureParameterBufferJPEG"
+    check_type "va/va.h va/va_enc_vp8.h"  "VAEncPictureParameterBufferVP8"
+    check_type "va/va.h va/va_enc_vp9.h"  "VAEncPictureParameterBufferVP9"
+fi
+
+if enabled_all opencl libdrm ; then
+    check_type "CL/cl_intel.h" "clCreateImageFromFdINTEL_fn" &&
+        enable opencl_drm_beignet
+    check_func_headers "CL/cl_ext.h" clImportMemoryARM &&
+        enable opencl_drm_arm
+fi
+
+if enabled_all opencl vaapi ; then
+    if enabled opencl_drm_beignet ; then
+        enable opencl_vaapi_beignet
+    else
+        check_type "CL/cl.h CL/cl_va_api_media_sharing_intel.h" "clCreateFromVA_APIMediaSurfaceINTEL_fn" &&
+            enable opencl_vaapi_intel_media
+    fi
+fi
+
+if enabled_all opencl dxva2 ; then
+    check_type "CL/cl_dx9_media_sharing.h" cl_dx9_surface_info_khr &&
+        enable opencl_dxva2
+fi
+
+if enabled_all opencl d3d11va ; then
+    check_type "CL/cl_d3d11.h" clGetDeviceIDsFromD3D11KHR_fn &&
+        enable opencl_d3d11
+fi
+
+enabled vdpau &&
+    check_cpp_condition vdpau vdpau/vdpau.h "defined VDP_DECODER_PROFILE_MPEG4_PART2_ASP"
+
+enabled vdpau &&
+    check_lib vdpau_x11 "vdpau/vdpau.h vdpau/vdpau_x11.h" vdp_device_create_x11 -lvdpau -lX11
+
+enabled crystalhd && check_lib crystalhd "stdint.h libcrystalhd/libcrystalhd_if.h" DtsCrystalHDVersion -lcrystalhd && \
+    warn "CrystalHD support is deprecated and will be removed, please contact the developers if you are interested"   \
+         "in maintaining it."
+
+if enabled vulkan; then
+    check_pkg_config_header_only vulkan "vulkan >= 1.2.189" "vulkan/vulkan.h" "defined VK_VERSION_1_2" ||
+        check_cpp_condition vulkan "vulkan/vulkan.h" "defined(VK_VERSION_1_3) || (defined(VK_VERSION_1_2) && VK_HEADER_VERSION >= 189)"
+fi
+
+if enabled x86; then
+    case $target_os in
+        mingw32*|mingw64*|win32|win64|linux|cygwin*)
+            ;;
+        *)
+            disable ffnvcodec cuvid nvdec nvenc
+            ;;
+    esac
+elif enabled_any aarch64 ppc64 && ! enabled bigendian; then
+    case $target_os in
+        linux)
+            ;;
+        *)
+            disable ffnvcodec cuvid nvdec nvenc
+            ;;
+    esac
+else
+    disable ffnvcodec cuvid nvdec nvenc
+fi
+
+enabled ffnvcodec && enable cuda
+
+enabled nvenc &&
+    test_cc -I$source_path <<EOF || disable nvenc
+#include <ffnvcodec/nvEncodeAPI.h>
+NV_ENCODE_API_FUNCTION_LIST flist;
+void f(void) { struct { const GUID guid; } s[] = { { NV_ENC_PRESET_HQ_GUID } }; }
+int main(void) { return 0; }
+EOF
+
+if enabled nvenc; then
+    check_type "ffnvcodec/nvEncodeAPI.h" "NV_ENC_PIC_PARAMS_AV1"
+fi
+
+if enabled_any nvdec cuvid; then
+    check_type "ffnvcodec/dynlink_cuda.h ffnvcodec/dynlink_cuviddec.h" "CUVIDAV1PICPARAMS"
+fi
+
+enabled amf &&
+    check_cpp_condition amf "AMF/core/Version.h" \
+        "(AMF_VERSION_MAJOR << 48 | AMF_VERSION_MINOR << 32 | AMF_VERSION_RELEASE << 16 | AMF_VERSION_BUILD_NUM) >= 0x00010004001c0000"
+
+# Funny iconv installations are not unusual, so check it after all flags have been set
+if enabled libc_iconv; then
+    check_func_headers iconv.h iconv
+elif enabled iconv; then
+    check_func_headers iconv.h iconv || check_lib iconv iconv.h iconv -liconv
+fi
+
+enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
+
+# add some useful compiler flags if supported
+check_cflags -Wdeclaration-after-statement
+check_cflags -Wall
+check_cflags -Wdisabled-optimization
+check_cflags -Wpointer-arith
+check_cflags -Wredundant-decls
+check_cflags -Wwrite-strings
+check_cflags -Wtype-limits
+check_cflags -Wundef
+check_cflags -Wmissing-prototypes
+check_cflags -Wstrict-prototypes
+check_cflags -Wempty-body
+
+if enabled extra_warnings; then
+    check_cflags -Wcast-qual
+    check_cflags -Wextra
+    check_cflags -Wpedantic
+fi
+
+check_disable_warning(){
+    warning_flag=-W${1#-Wno-}
+    test_cflags $unknown_warning_flags $warning_flag && add_cflags $1
+}
+
+test_cflags -Werror=unused-command-line-argument &&
+    append unknown_warning_flags "-Werror=unused-command-line-argument"
+test_cflags -Werror=unknown-warning-option &&
+    append unknown_warning_flags "-Werror=unknown-warning-option"
+
+check_disable_warning -Wno-parentheses
+check_disable_warning -Wno-switch
+check_disable_warning -Wno-format-zero-length
+check_disable_warning -Wno-pointer-sign
+check_disable_warning -Wno-unused-const-variable
+check_disable_warning -Wno-bool-operation
+check_disable_warning -Wno-char-subscripts
+
+check_disable_warning_headers(){
+    warning_flag=-W${1#-Wno-}
+    test_cflags $warning_flag && add_cflags_headers $1
+}
+
+check_disable_warning_headers -Wno-deprecated-declarations
+check_disable_warning_headers -Wno-unused-variable
+
+test_cc <<EOF && enable blocks_extension
+void (^block)(void);
+EOF
+
+# add some linker flags
+check_ldflags -Wl,--warn-common
+check_ldflags -Wl,-rpath-link=:libpostproc:libswresample:libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil
+enabled rpath && add_ldexeflags -Wl,-rpath,$libdir && add_ldsoflags -Wl,-rpath,$libdir
+test_ldflags -Wl,-Bsymbolic && append SHFLAGS -Wl,-Bsymbolic
+
+# add some strip flags
+check_stripflags -x
+
+enabled neon_clobber_test &&
+    check_ldflags -Wl,--wrap,avcodec_open2              \
+                  -Wl,--wrap,avcodec_decode_subtitle2   \
+                  -Wl,--wrap,avcodec_encode_subtitle    \
+                  -Wl,--wrap,avcodec_send_packet        \
+                  -Wl,--wrap,avcodec_receive_packet     \
+                  -Wl,--wrap,avcodec_send_frame         \
+                  -Wl,--wrap,avcodec_receive_frame      \
+                  -Wl,--wrap,swr_convert        ||
+    disable neon_clobber_test
+
+enabled xmm_clobber_test &&
+    check_ldflags -Wl,--wrap,avcodec_open2              \
+                  -Wl,--wrap,avcodec_decode_subtitle2   \
+                  -Wl,--wrap,avcodec_encode_subtitle    \
+                  -Wl,--wrap,avcodec_send_packet        \
+                  -Wl,--wrap,avcodec_receive_packet     \
+                  -Wl,--wrap,avcodec_send_frame         \
+                  -Wl,--wrap,avcodec_receive_frame      \
+                  -Wl,--wrap,swr_convert                \
+                  -Wl,--wrap,sws_scale ||
+    disable xmm_clobber_test
+
+check_ld "cc" proper_dce <<EOF
+extern const int array[512];
+static inline int func(void) { return array[0]; }
+int main(void) { return 0; }
+EOF
+
+if enabled proper_dce; then
+    echo "X { local: *; };" > $TMPV
+    if test_ldflags -Wl,${version_script},$TMPV; then
+        append SHFLAGS '-Wl,${version_script},\$(SUBDIR)lib\$(NAME).ver'
+        quotes='""'
+        test_cc <<EOF && enable symver_asm_label
+void ff_foo(void) __asm__ ("av_foo@VERSION");
+void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
+EOF
+        test_cc <<EOF && enable symver_gnu_asm
+__asm__(".symver ff_foo,av_foo@VERSION");
+void ff_foo(void) {}
+EOF
+    fi
+fi
+
+if [ -z "$optflags" ]; then
+    if enabled small; then
+        optflags=$cflags_size
+    elif enabled optimizations; then
+        optflags=$cflags_speed
+    else
+        optflags=$cflags_noopt
+    fi
+fi
+
+check_optflags(){
+    check_cflags "$@"
+    enabled lto && check_ldflags "$@"
+}
+
+check_optflags $optflags
+check_optflags -fno-math-errno
+check_optflags -fno-signed-zeros
+
+if enabled lto; then
+    test "$cc_type" != "$ld_type" && die "LTO requires same compiler and linker"
+    check_cflags  -flto
+    check_ldflags -flto $cpuflags
+    disable inline_asm_direct_symbol_refs
+fi
+
+enabled ftrapv && check_cflags -ftrapv
+
+test_cc -mno-red-zone <<EOF && noredzone_flags="-mno-red-zone"
+int x;
+EOF
+
+
+if enabled icc; then
+    # Just warnings, no remarks
+    check_cflags -w1
+    # -wd: Disable following warnings
+    # 144, 167, 556: -Wno-pointer-sign
+    # 188: enumerated type mixed with another type
+    # 1292: attribute "foo" ignored
+    # 1419: external declaration in primary source file
+    # 10006: ignoring unknown option -fno-signed-zeros
+    # 10148: ignoring unknown option -Wno-parentheses
+    # 10156: ignoring option '-W'; no argument required
+    # 13200: No EMMS instruction before call to function
+    # 13203: No EMMS instruction before return from function
+    check_cflags -wd144,167,188,556,1292,1419,10006,10148,10156,13200,13203
+    # 11030: Warning unknown option --as-needed
+    # 10156: ignoring option '-export'; no argument required
+    check_ldflags -wd10156,11030
+    # icc 11.0 and 11.1 work with ebp_available, but don't pass the test
+    enable ebp_available
+    # The test above does not test linking
+    enabled lto && disable symver_asm_label
+    if enabled x86_32; then
+        icc_version=$($cc -dumpversion)
+        test ${icc_version%%.*} -ge 11 &&
+            check_cflags -falign-stack=maintain-16-byte ||
+            disable aligned_stack
+    fi
+elif enabled gcc; then
+    check_optflags -fno-tree-vectorize
+    check_cflags -Werror=format-security
+    check_cflags -Werror=implicit-function-declaration
+    check_cflags -Werror=missing-prototypes
+    check_cflags -Werror=return-type
+    check_cflags -Werror=vla
+    check_cflags -Wformat
+    check_cflags -fdiagnostics-color=auto
+    enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
+    if enabled x86_32; then
+        case $target_os in
+        *bsd*)
+            # BSDs don't guarantee a 16 byte aligned stack, but we can
+            # request GCC to try to maintain 16 byte alignment throughout
+            # function calls. Library entry points that might call assembly
+            # functions align the stack. (The parameter means 2^4 bytes.)
+            check_cflags -mpreferred-stack-boundary=4
+            ;;
+        esac
+    fi
+elif enabled llvm_gcc; then
+    check_cflags -mllvm -stack-alignment=16
+elif enabled clang; then
+    if enabled x86_32; then
+        # Clang doesn't support maintaining alignment without assuming the
+        # same alignment in every function. If 16 byte alignment would be
+        # enabled, one would also have to either add attribute_align_arg on
+        # every single entry point into the libraries or enable -mstackrealign
+        # (doing stack realignment in every single function).
+        case $target_os in
+        mingw32|win32|*bsd*)
+            disable aligned_stack
+            ;;
+        *)
+            check_cflags -mllvm -stack-alignment=16
+            check_cflags -mstack-alignment=16
+            ;;
+        esac
+    else
+        check_cflags -mllvm -stack-alignment=16
+        check_cflags -mstack-alignment=16
+    fi
+    check_cflags -Qunused-arguments
+    check_cflags -Werror=implicit-function-declaration
+    check_cflags -Werror=missing-prototypes
+    check_cflags -Werror=return-type
+elif enabled cparser; then
+    add_cflags -Wno-missing-variable-declarations
+    add_cflags -Wno-empty-statement
+elif enabled armcc; then
+    add_cflags -W${armcc_opt},--diag_suppress=4343 # hardfp compat
+    add_cflags -W${armcc_opt},--diag_suppress=3036 # using . as system include dir
+    # 2523: use of inline assembly is deprecated
+    add_cflags -W${armcc_opt},--diag_suppress=2523
+    add_cflags -W${armcc_opt},--diag_suppress=1207
+    add_cflags -W${armcc_opt},--diag_suppress=1293 # assignment in condition
+    add_cflags -W${armcc_opt},--diag_suppress=3343 # hardfp compat
+    add_cflags -W${armcc_opt},--diag_suppress=167  # pointer sign
+    add_cflags -W${armcc_opt},--diag_suppress=513  # pointer sign
+elif enabled pathscale; then
+    add_cflags -fstrict-overflow -OPT:wrap_around_unsafe_opt=OFF
+    disable inline_asm
+elif enabled_any msvc icl; then
+    enabled x86_32 && disable aligned_stack
+    enabled_all x86_32 debug && add_cflags -Oy-
+    enabled debug && add_ldflags -debug
+    enable pragma_deprecated
+    if enabled icl; then
+        # -Qansi-alias is basically -fstrict-aliasing, but does not work
+        # (correctly) on icl 13.x.
+        test_cpp_condition "windows.h" "__ICL < 1300 || __ICL >= 1400" &&
+            add_cflags -Qansi-alias
+        # Some inline asm is not compilable in debug
+        if enabled debug; then
+            disable ebp_available
+            disable ebx_available
+        fi
+    fi
+    # msvcrt10 x64 incorrectly enables log2, only msvcrt12 (MSVC 2013) onwards actually has log2.
+    check_cpp_condition log2 crtversion.h "_VC_CRT_MAJOR_VERSION >= 12"
+    # The CRT headers contain __declspec(restrict) in a few places, but if redefining
+    # restrict, this might break. MSVC 2010 and 2012 fail with __declspec(__restrict)
+    # (as it ends up if the restrict redefine is done before including stdlib.h), while
+    # MSVC 2013 and newer can handle it fine.
+    # If this declspec fails, force including stdlib.h before the restrict redefinition
+    # happens in config.h.
+    if [ $restrict_keyword != restrict ]; then
+        test_cc <<EOF || add_cflags -FIstdlib.h
+__declspec($restrict_keyword) void *foo(int);
+EOF
+    fi
+    # the new SSA optimzer in VS2015 U3 is mis-optimizing some parts of the code
+    # Issue has been fixed in MSVC v19.00.24218.
+    test_cpp_condition windows.h "_MSC_FULL_VER >= 190024218" ||
+        check_cflags -d2SSAOptimizer-
+    # enable utf-8 source processing on VS2015 U2 and newer
+    test_cpp_condition windows.h "_MSC_FULL_VER >= 190023918" &&
+        add_cflags -utf-8
+fi
+
+for pfx in "" host_; do
+    varname=${pfx%_}cc_type
+    eval "type=\$$varname"
+    if [ "$type" = "msvc" ]; then
+        test_${pfx}cc <<EOF || add_${pfx}cflags -Dinline=__inline
+static inline int foo(int a) { return a; }
+EOF
+    fi
+done
+
+case $as_type in
+    clang)
+        add_asflags -Qunused-arguments
+    ;;
+esac
+
+case $ld_type in
+    clang)
+        check_ldflags -Qunused-arguments
+    ;;
+esac
+
+enable frame_thread_encoder
+
+# these filters depend on removed avcodec APIs
+# they are kept disabled for now, but will be removed if
+# nobody updates and re-enables them
+disable mcdeint_filter
+disable uspp_filter
+
+enabled asm || { arch=c; disable $ARCH_LIST $ARCH_EXT_LIST; }
+
+check_deps $CONFIG_LIST       \
+           $CONFIG_EXTRA      \
+           $HAVE_LIST         \
+           $ALL_COMPONENTS    \
+
+enabled threads && ! enabled pthreads && ! enabled atomics_native && die "non pthread threading without atomics not supported, try adding --enable-pthreads or --cpu=i486 or higher if you are on x86"
+
+case $target_os in
+haiku)
+    disable memalign
+    disable posix_memalign
+    ;;
+*-dos|freedos|opendos)
+    if test_cpp_condition sys/version.h "defined(__DJGPP__) && __DJGPP__ == 2 && __DJGPP_MINOR__ == 5"; then
+        disable memalign
+    fi
+    ;;
+esac
+
+flatten_extralibs(){
+    nested_entries=
+    list_name=$1
+    eval list=\$${1}
+    for entry in $list; do
+        entry_copy=$entry
+        resolve entry_copy
+        flat_entries=
+        for e in $entry_copy; do
+            case $e in
+                *_extralibs) nested_entries="$nested_entries$e ";;
+                          *) flat_entries="$flat_entries$e ";;
+            esac
+        done
+        eval $entry="\$flat_entries"
+    done
+    append $list_name "$nested_entries"
+
+    resolve nested_entries
+    if test -n "$(filter '*_extralibs' $nested_entries)"; then
+        flatten_extralibs $list_name
+    fi
+}
+
+flatten_extralibs_wrapper(){
+    list_name=$1
+    flatten_extralibs $list_name
+    unique $list_name
+    resolve $list_name
+    eval $list_name=\$\(\$ldflags_filter \$$list_name\)
+    eval printf \''%s'\' \""\$$list_name"\"
+}
+
+for linkunit in $LIBRARY_LIST; do
+    unset current_extralibs
+    eval components=\$$(toupper ${linkunit})_COMPONENTS_LIST
+    for comp in ${components}; do
+        enabled $comp || continue
+        comp_extralibs="${comp}_extralibs"
+        append current_extralibs $comp_extralibs
+    done
+    eval prepend ${linkunit}_extralibs $current_extralibs
+done
+
+for linkunit in $LIBRARY_LIST $PROGRAM_LIST $EXTRALIBS_LIST; do
+    eval ${linkunit}_extralibs=\$\(flatten_extralibs_wrapper ${linkunit}_extralibs\)
+done
+
+map 'enabled $v && intrinsics=${v#intrinsics_}' $INTRINSICS_LIST
+
+for thread in $THREADS_LIST; do
+    if enabled $thread; then
+        test -n "$thread_type" &&
+            die "ERROR: Only one thread type must be selected." ||
+            thread_type="$thread"
+    fi
+done
+
+if disabled stdatomic; then
+    if enabled atomics_gcc; then
+        add_cppflags '-I\$(SRC_PATH)/compat/atomics/gcc'
+    elif enabled atomics_win32; then
+        add_cppflags '-I\$(SRC_PATH)/compat/atomics/win32'
+    elif enabled atomics_suncc; then
+        add_cppflags '-I\$(SRC_PATH)/compat/atomics/suncc'
+    elif enabled pthreads; then
+        add_compat atomics/pthread/stdatomic.o
+        add_cppflags '-I\$(SRC_PATH)/compat/atomics/pthread'
+    else
+        enabled threads && die "Threading is enabled, but no atomics are available"
+        add_cppflags '-I\$(SRC_PATH)/compat/atomics/dummy'
+    fi
+fi
+
+# Check if requested libraries were found.
+for lib in $AUTODETECT_LIBS; do
+    requested $lib && ! enabled $lib && die "ERROR: $lib requested but not found";
+done
+
+enabled zlib && add_cppflags -DZLIB_CONST
+
+# conditional library dependencies, in any order
+enabled amovie_filter       && prepend avfilter_deps "avformat avcodec"
+enabled aresample_filter    && prepend avfilter_deps "swresample"
+enabled cover_rect_filter   && prepend avfilter_deps "avformat avcodec"
+enabled ebur128_filter && enabled swresample && prepend avfilter_deps "swresample"
+enabled elbg_filter         && prepend avfilter_deps "avcodec"
+enabled find_rect_filter    && prepend avfilter_deps "avformat avcodec"
+enabled mcdeint_filter      && prepend avfilter_deps "avcodec"
+enabled movie_filter    && prepend avfilter_deps "avformat avcodec"
+enabled pan_filter          && prepend avfilter_deps "swresample"
+enabled pp_filter           && prepend avfilter_deps "postproc"
+enabled removelogo_filter   && prepend avfilter_deps "avformat avcodec swscale"
+enabled sab_filter          && prepend avfilter_deps "swscale"
+enabled scale_filter    && prepend avfilter_deps "swscale"
+enabled scale2ref_filter    && prepend avfilter_deps "swscale"
+enabled showcqt_filter      && prepend avfilter_deps "avformat swscale"
+enabled signature_filter    && prepend avfilter_deps "avcodec avformat"
+enabled smartblur_filter    && prepend avfilter_deps "swscale"
+enabled spp_filter          && prepend avfilter_deps "avcodec"
+enabled sr_filter           && prepend avfilter_deps "avformat swscale"
+enabled subtitles_filter    && prepend avfilter_deps "avformat avcodec"
+enabled uspp_filter         && prepend avfilter_deps "avcodec"
+enabled zoompan_filter      && prepend avfilter_deps "swscale"
+
+enabled lavfi_indev         && prepend avdevice_deps "avfilter"
+
+#FIXME
+enabled_any sdl2_outdev opengl_outdev && enabled sdl2 &&
+    add_cflags $(filter_out '-Dmain=SDL_main' $sdl2_cflags)
+
+enabled opus_decoder    && prepend avcodec_deps "swresample"
+
+# reorder the items at var $1 to align with the items order at var $2 .
+# die if an item at $1 is not at $2 .
+reorder_by(){
+    eval rb_in=\$$1
+    eval rb_ordered=\$$2
+
+    for rb in $rb_in; do
+        is_in $rb $rb_ordered || die "$rb at \$$1 is not at \$$2"
+    done
+
+    rb_out=
+    for rb in $rb_ordered; do
+        is_in $rb $rb_in && rb_out="$rb_out$rb "
+    done
+    eval $1=\$rb_out
+}
+
+# deps-expand fflib $1:  N x {append all expanded deps; unique}
+# within a set of N items, N expansions are enough to expose a cycle.
+expand_deps(){
+    unique ${1}_deps  # required for the early break test.
+    for dummy in $LIBRARY_LIST; do  # N iteratios
+        eval deps=\$${1}_deps
+        append ${1}_deps $(map 'eval echo \$${v}_deps' $deps)
+        unique ${1}_deps
+        eval '[ ${#deps} = ${#'${1}_deps'} ]' && break  # doesn't expand anymore
+    done
+
+    eval is_in $1 \$${1}_deps && die "Dependency cycle at ${1}_deps"
+    reorder_by ${1}_deps LIBRARY_LIST  # linking order is expected later
+}
+
+#we have to remove gpl from the deps here as some code assumes all lib deps are libs
+postproc_deps="$(filter_out 'gpl' $postproc_deps)"
+
+map 'expand_deps $v' $LIBRARY_LIST
+
+if test "$quiet" != "yes"; then
+
+echo "install prefix            $prefix"
+echo "source path               $source_path"
+echo "C compiler                $cc"
+echo "C library                 $libc_type"
+if test "$host_cc" != "$cc"; then
+    echo "host C compiler           $host_cc"
+    echo "host C library            $host_libc_type"
+fi
+echo "ARCH                      $arch ($cpu)"
+if test "$build_suffix" != ""; then
+    echo "build suffix              $build_suffix"
+fi
+if test "$progs_suffix" != ""; then
+    echo "progs suffix              $progs_suffix"
+fi
+if test "$extra_version" != ""; then
+    echo "version string suffix     $extra_version"
+fi
+echo "big-endian                ${bigendian-no}"
+echo "runtime cpu detection     ${runtime_cpudetect-no}"
+if enabled x86; then
+    echo "standalone assembly       ${x86asm-no}"
+    echo "x86 assembler             ${x86asmexe}"
+    echo "MMX enabled               ${mmx-no}"
+    echo "MMXEXT enabled            ${mmxext-no}"
+    echo "3DNow! enabled            ${amd3dnow-no}"
+    echo "3DNow! extended enabled   ${amd3dnowext-no}"
+    echo "SSE enabled               ${sse-no}"
+    echo "SSSE3 enabled             ${ssse3-no}"
+    echo "AESNI enabled             ${aesni-no}"
+    echo "AVX enabled               ${avx-no}"
+    echo "AVX2 enabled              ${avx2-no}"
+    echo "AVX-512 enabled           ${avx512-no}"
+    echo "AVX-512ICL enabled        ${avx512icl-no}"
+    echo "XOP enabled               ${xop-no}"
+    echo "FMA3 enabled              ${fma3-no}"
+    echo "FMA4 enabled              ${fma4-no}"
+    echo "i686 features enabled     ${i686-no}"
+    echo "CMOV is fast              ${fast_cmov-no}"
+    echo "EBX available             ${ebx_available-no}"
+    echo "EBP available             ${ebp_available-no}"
+fi
+if enabled aarch64; then
+    echo "NEON enabled              ${neon-no}"
+    echo "VFP enabled               ${vfp-no}"
+fi
+if enabled arm; then
+    echo "ARMv5TE enabled           ${armv5te-no}"
+    echo "ARMv6 enabled             ${armv6-no}"
+    echo "ARMv6T2 enabled           ${armv6t2-no}"
+    echo "VFP enabled               ${vfp-no}"
+    echo "NEON enabled              ${neon-no}"
+    echo "THUMB enabled             ${thumb-no}"
+fi
+if enabled mips; then
+    echo "MIPS FPU enabled          ${mipsfpu-no}"
+    echo "MIPS DSP R1 enabled       ${mipsdsp-no}"
+    echo "MIPS DSP R2 enabled       ${mipsdspr2-no}"
+    echo "MIPS MSA enabled          ${msa-no}"
+    echo "LOONGSON MMI enabled      ${mmi-no}"
+fi
+if enabled ppc; then
+    echo "AltiVec enabled           ${altivec-no}"
+    echo "VSX enabled               ${vsx-no}"
+    echo "POWER8 enabled            ${power8-no}"
+    echo "PPC 4xx optimizations     ${ppc4xx-no}"
+    echo "dcbzl available           ${dcbzl-no}"
+fi
+if enabled loongarch; then
+    echo "LSX enabled               ${lsx-no}"
+    echo "LASX enabled              ${lasx-no}"
+fi
+if enabled riscv; then
+    echo "RISC-V Vector enabled     ${rvv-no}"
+fi
+echo "debug symbols             ${debug-no}"
+echo "strip symbols             ${stripping-no}"
+echo "optimize for size         ${small-no}"
+echo "optimizations             ${optimizations-no}"
+echo "static                    ${static-no}"
+echo "shared                    ${shared-no}"
+echo "postprocessing support    ${postproc-no}"
+echo "network support           ${network-no}"
+echo "threading support         ${thread_type-no}"
+echo "safe bitstream reader     ${safe_bitstream_reader-no}"
+echo "texi2html enabled         ${texi2html-no}"
+echo "perl enabled              ${perl-no}"
+echo "pod2man enabled           ${pod2man-no}"
+echo "makeinfo enabled          ${makeinfo-no}"
+echo "makeinfo supports HTML    ${makeinfo_html-no}"
+echo "xmllint enabled           ${xmllint-no}"
+test -n "$random_seed" &&
+    echo "random seed               ${random_seed}"
+echo
+
+echo "External libraries:"
+print_enabled '' $EXTERNAL_LIBRARY_LIST $EXTERNAL_AUTODETECT_LIBRARY_LIST | print_in_columns
+echo
+
+echo "External libraries providing hardware acceleration:"
+print_enabled '' $HWACCEL_LIBRARY_LIST $HWACCEL_AUTODETECT_LIBRARY_LIST | print_in_columns
+echo
+
+echo "Libraries:"
+print_enabled '' $LIBRARY_LIST | print_in_columns
+echo
+
+echo "Programs:"
+print_enabled '' $PROGRAM_LIST | print_in_columns
+echo
+
+for type in decoder encoder hwaccel parser demuxer muxer protocol filter bsf indev outdev; do
+    echo "Enabled ${type}s:"
+    eval list=\$$(toupper $type)_LIST
+    print_enabled '_*' $list | print_in_columns
+    echo
+done
+
+if test -n "$ignore_tests"; then
+    ignore_tests=$(echo $ignore_tests | tr ',' ' ')
+    echo "Ignored FATE tests:"
+    echo $ignore_tests | print_in_columns
+    echo
+fi
+
+echo "License: $license"
+
+fi # test "$quiet" != "yes"
+
+if test -n "$WARN_IF_GETS_DISABLED_LIST"; then
+    for cfg in $WARN_IF_GETS_DISABLED_LIST; do
+        if disabled $cfg; then
+            varname=${cfg}_disable_reason
+            eval "warn \"Disabled $cfg because \$$varname\""
+        fi
+    done
+fi
+
+if test -n "$WARNINGS"; then
+    printf "\n%s%s$WARNINGS%s" "$warn_color" "$bold_color" "$reset_color"
+    enabled fatal_warnings && exit 1
+fi
+
+test -e Makefile || echo "include $source_path/Makefile" > Makefile
+
+esc(){
+    echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
+}
+
+echo "config:$arch:$subarch:$cpu:$target_os:$(esc $cc_ident):$(esc $FFMPEG_CONFIGURATION)" > ffbuild/config.fate
+
+enabled stripping || strip="echo skipping strip"
+enabled stripping || striptype=""
+
+config_files="$TMPH ffbuild/config.mak doc/config.texi"
+
+cat > ffbuild/config.mak <<EOF
+# Automatically generated by configure - do not modify!
+ifndef FFMPEG_CONFIG_MAK
+FFMPEG_CONFIG_MAK=1
+FFMPEG_CONFIGURATION=$FFMPEG_CONFIGURATION
+prefix=$prefix
+LIBDIR=\$(DESTDIR)$libdir
+SHLIBDIR=\$(DESTDIR)$shlibdir
+INCDIR=\$(DESTDIR)$incdir
+BINDIR=\$(DESTDIR)$bindir
+DATADIR=\$(DESTDIR)$datadir
+DOCDIR=\$(DESTDIR)$docdir
+MANDIR=\$(DESTDIR)$mandir
+PKGCONFIGDIR=\$(DESTDIR)$pkgconfigdir
+INSTALL_NAME_DIR=$install_name_dir
+SRC_PATH=$source_path
+SRC_LINK=$source_link
+ifndef MAIN_MAKEFILE
+SRC_PATH:=\$(SRC_PATH:.%=..%)
+endif
+CC_IDENT=$cc_ident
+ARCH=$arch
+INTRINSICS=$intrinsics
+EXTERN_PREFIX=$extern_prefix
+CC=$cc
+CXX=$cxx
+AS=$as
+OBJCC=$objcc
+LD=$ld
+DEPCC=$dep_cc
+DEPCCFLAGS=$DEPCCFLAGS \$(CPPFLAGS)
+DEPAS=$as
+DEPASFLAGS=$DEPASFLAGS \$(CPPFLAGS)
+X86ASM=$x86asmexe
+DEPX86ASM=$x86asmexe
+DEPX86ASMFLAGS=\$(X86ASMFLAGS)
+AR=$ar
+ARFLAGS=$arflags
+AR_O=$ar_o
+AR_CMD=$ar
+NM_CMD=$nm
+METALCC=$metalcc
+METALLIB=$metallib
+RANLIB=$ranlib
+STRIP=$strip
+STRIPTYPE=$striptype
+NVCC=$nvcc
+CP=cp -p
+LN_S=$ln_s
+CPPFLAGS=$CPPFLAGS
+CFLAGS=$CFLAGS
+CXXFLAGS=$CXXFLAGS
+OBJCCFLAGS=$OBJCFLAGS
+ASFLAGS=$ASFLAGS
+NVCCFLAGS=$nvccflags
+AS_C=$AS_C
+AS_O=$AS_O
+OBJCC_C=$OBJCC_C
+OBJCC_E=$OBJCC_E
+OBJCC_O=$OBJCC_O
+CC_C=$CC_C
+CC_E=$CC_E
+CC_O=$CC_O
+CXX_C=$CXX_C
+CXX_O=$CXX_O
+NVCC_C=$NVCC_C
+NVCC_O=$NVCC_O
+LD_O=$LD_O
+X86ASM_O=$X86ASM_O
+LD_LIB=$LD_LIB
+LD_PATH=$LD_PATH
+DLLTOOL=$dlltool
+WINDRES=$windres
+DOXYGEN=$doxygen
+LDFLAGS=$LDFLAGS
+LDEXEFLAGS=$LDEXEFLAGS
+LDSOFLAGS=$LDSOFLAGS
+SHFLAGS=$(echo $($ldflags_filter $SHFLAGS))
+ASMSTRIPFLAGS=$ASMSTRIPFLAGS
+X86ASMFLAGS=$X86ASMFLAGS
+MSAFLAGS=$MSAFLAGS
+MMIFLAGS=$MMIFLAGS
+LSXFLAGS=$LSXFLAGS
+LASXFLAGS=$LASXFLAGS
+BUILDSUF=$build_suffix
+PROGSSUF=$progs_suffix
+FULLNAME=$FULLNAME
+LIBPREF=$LIBPREF
+LIBSUF=$LIBSUF
+LIBNAME=$LIBNAME
+SLIBPREF=$SLIBPREF
+SLIBSUF=$SLIBSUF
+EXESUF=$EXESUF
+EXTRA_VERSION=$extra_version
+CCDEP=$CCDEP
+CXXDEP=$CXXDEP
+CCDEP_FLAGS=$CCDEP_FLAGS
+ASDEP=$ASDEP
+ASDEP_FLAGS=$ASDEP_FLAGS
+X86ASMDEP=$X86ASMDEP
+X86ASMDEP_FLAGS=$X86ASMDEP_FLAGS
+CC_DEPFLAGS=$CC_DEPFLAGS
+CXX_DEPFLAGS=$CXX_DEPFLAGS
+OBJCC_DEPFLAGS=$OBJC_DEPFLAGS
+AS_DEPFLAGS=$AS_DEPFLAGS
+X86ASM_DEPFLAGS=$X86ASM_DEPFLAGS
+HOSTCC=$host_cc
+HOSTLD=$host_ld
+HOSTCFLAGS=$host_cflags
+HOSTCPPFLAGS=$host_cppflags
+HOSTEXESUF=$HOSTEXESUF
+HOSTLDFLAGS=$host_ldflags
+HOSTEXTRALIBS=$host_extralibs
+DEPHOSTCC=$host_cc
+DEPHOSTCCFLAGS=$DEPHOSTCCFLAGS \$(HOSTCCFLAGS)
+HOSTCCDEP=$HOSTCCDEP
+HOSTCCDEP_FLAGS=$HOSTCCDEP_FLAGS
+HOSTCC_DEPFLAGS=$HOSTCC_DEPFLAGS
+HOSTCC_C=$HOSTCC_C
+HOSTCC_O=$HOSTCC_O
+HOSTLD_O=$HOSTLD_O
+TARGET_EXEC=$target_exec $target_exec_args
+TARGET_PATH=$target_path
+TARGET_SAMPLES=${target_samples:-\$(SAMPLES)}
+CFLAGS-ffplay=${sdl2_cflags}
+CFLAGS_HEADERS=$CFLAGS_HEADERS
+LIB_INSTALL_EXTRA_CMD=$LIB_INSTALL_EXTRA_CMD
+EXTRALIBS=$extralibs
+COMPAT_OBJS=$compat_objs
+INSTALL=$install
+LIBTARGET=${LIBTARGET}
+SLIBNAME=${SLIBNAME}
+SLIBNAME_WITH_VERSION=${SLIBNAME_WITH_VERSION}
+SLIBNAME_WITH_MAJOR=${SLIBNAME_WITH_MAJOR}
+SLIB_CREATE_DEF_CMD=${SLIB_CREATE_DEF_CMD}
+SLIB_EXTRA_CMD=${SLIB_EXTRA_CMD}
+SLIB_INSTALL_NAME=${SLIB_INSTALL_NAME}
+SLIB_INSTALL_LINKS=${SLIB_INSTALL_LINKS}
+SLIB_INSTALL_EXTRA_LIB=${SLIB_INSTALL_EXTRA_LIB}
+SLIB_INSTALL_EXTRA_SHLIB=${SLIB_INSTALL_EXTRA_SHLIB}
+VERSION_SCRIPT_POSTPROCESS_CMD=${VERSION_SCRIPT_POSTPROCESS_CMD}
+SAMPLES:=${samples:-\$(FATE_SAMPLES)}
+NOREDZONE_FLAGS=$noredzone_flags
+LIBFUZZER_PATH=$libfuzzer_path
+IGNORE_TESTS=$ignore_tests
+EOF
+
+map 'eval echo "${v}_FFLIBS=\$${v}_deps" >> ffbuild/config.mak' $LIBRARY_LIST
+
+for entry in $LIBRARY_LIST $PROGRAM_LIST $EXTRALIBS_LIST; do
+    eval echo "EXTRALIBS-${entry}=\$${entry}_extralibs" >> ffbuild/config.mak
+done
+
+cat > $TMPH <<EOF
+/* Automatically generated by configure - do not modify! */
+#ifndef FFMPEG_CONFIG_H
+#define FFMPEG_CONFIG_H
+#define FFMPEG_CONFIGURATION "$(c_escape $FFMPEG_CONFIGURATION)"
+#define FFMPEG_LICENSE "$(c_escape $license)"
+#define CONFIG_THIS_YEAR 2023
+#define FFMPEG_DATADIR "$(eval c_escape $datadir)"
+#define AVCONV_DATADIR "$(eval c_escape $datadir)"
+#define CC_IDENT "$(c_escape ${cc_ident:-Unknown compiler})"
+#define OS_NAME $target_os
+#define av_restrict $restrict_keyword
+#define EXTERN_PREFIX "${extern_prefix}"
+#define EXTERN_ASM ${extern_prefix}
+#define BUILDSUF "$build_suffix"
+#define SLIBSUF "$SLIBSUF"
+#define HAVE_MMX2 HAVE_MMXEXT
+#define SWS_MAX_FILTER_SIZE $sws_max_filter_size
+EOF
+
+test -n "$assert_level" &&
+    echo "#define ASSERT_LEVEL $assert_level" >>$TMPH
+
+test -n "$malloc_prefix" &&
+    echo "#define MALLOC_PREFIX $malloc_prefix" >>$TMPH
+
+if enabled x86asm; then
+    append config_files $TMPASM
+    cat > $TMPASM <<EOF
+; Automatically generated by configure - do not modify!
+EOF
+fi
+
+enabled getenv || echo "#define getenv(x) NULL" >> $TMPH
+
+
+mkdir -p doc
+mkdir -p tests
+mkdir -p tests/api
+echo "@c auto-generated by configure - do not modify! " > doc/config.texi
+
+print_config ARCH_   "$config_files" $ARCH_LIST
+print_config HAVE_   "$config_files" $HAVE_LIST
+print_config CONFIG_ "$config_files" $CONFIG_LIST       \
+                                     $CONFIG_EXTRA      \
+
+echo "#endif /* FFMPEG_CONFIG_H */" >> $TMPH
+
+# Do not overwrite an unchanged config.h to avoid superfluous rebuilds.
+cp_if_changed $TMPH config.h
+touch ffbuild/.config
+
+# Copy config.asm before printing ALL_COMPONENTS; that's not needed in assembly.
+enabled x86asm && cp_if_changed $TMPASM config.asm
+
+# Reopen a new TMPH for config_components.h.
+cat > $TMPH <<EOF
+/* Automatically generated by configure - do not modify! */
+#ifndef FFMPEG_CONFIG_COMPONENTS_H
+#define FFMPEG_CONFIG_COMPONENTS_H
+EOF
+
+print_config CONFIG_ "$config_files" $ALL_COMPONENTS
+
+echo "#endif /* FFMPEG_CONFIG_COMPONENTS_H */" >> $TMPH
+echo "endif # FFMPEG_CONFIG_MAK" >> ffbuild/config.mak
+
+cp_if_changed $TMPH config_components.h
+
+cat > $TMPH <<EOF
+/* Generated by ffmpeg configure */
+#ifndef AVUTIL_AVCONFIG_H
+#define AVUTIL_AVCONFIG_H
+EOF
+
+print_config AV_HAVE_ $TMPH $HAVE_LIST_PUB
+
+echo "#endif /* AVUTIL_AVCONFIG_H */" >> $TMPH
+
+cp_if_changed $TMPH libavutil/avconfig.h
+
+# full_filter_name_foo=vf_foo
+# full_filter_name_bar=asrc_bar
+# ...
+eval "$(sed -n "s/^extern const AVFilter ff_\([avfsinkrc]\{2,5\}\)_\(.*\);/full_filter_name_\2=\1_\2/p" $source_path/libavfilter/allfilters.c)"
+
+# generate the lists of enabled components
+print_enabled_components(){
+    file=$1
+    struct_name=$2
+    name=$3
+    shift 3
+    echo "static const $struct_name * const $name[] = {" > $TMPH
+    for c in $*; do
+        if enabled $c; then
+            case $name in
+                filter_list)
+                    eval c=\$full_filter_name_${c%_filter}
+                ;;
+                indev_list)
+                    c=${c%_indev}_demuxer
+                ;;
+                outdev_list)
+                    c=${c%_outdev}_muxer
+                ;;
+            esac
+            printf "    &ff_%s,\n" $c >> $TMPH
+        fi
+    done
+    if [ "$name" = "filter_list" ]; then
+        for c in asrc_abuffer vsrc_buffer asink_abuffer vsink_buffer; do
+            printf "    &ff_%s,\n" $c >> $TMPH
+        done
+    fi
+    echo "    NULL };" >> $TMPH
+    cp_if_changed $TMPH $file
+}
+
+print_enabled_components libavfilter/filter_list.c AVFilter filter_list $FILTER_LIST
+print_enabled_components libavcodec/codec_list.c FFCodec codec_list $CODEC_LIST
+print_enabled_components libavcodec/parser_list.c AVCodecParser parser_list $PARSER_LIST
+print_enabled_components libavcodec/bsf_list.c FFBitStreamFilter bitstream_filters $BSF_LIST
+print_enabled_components libavformat/demuxer_list.c AVInputFormat demuxer_list $DEMUXER_LIST
+print_enabled_components libavformat/muxer_list.c FFOutputFormat muxer_list $MUXER_LIST
+print_enabled_components libavdevice/indev_list.c AVInputFormat indev_list $INDEV_LIST
+print_enabled_components libavdevice/outdev_list.c FFOutputFormat outdev_list $OUTDEV_LIST
+print_enabled_components libavformat/protocol_list.c URLProtocol url_protocols $PROTOCOL_LIST
+
+# Settings for pkg-config files
+
+cat > $TMPH <<EOF
+# Automatically generated by configure - do not modify!
+shared=$shared
+build_suffix=$build_suffix
+prefix=$prefix
+libdir=$libdir
+incdir=$incdir
+rpath=$(enabled rpath && echo "-Wl,-rpath,\${libdir}")
+source_path=${source_path}
+LIBPREF=${LIBPREF}
+LIBSUF=${LIBSUF}
+extralibs_avutil="$avutil_extralibs"
+extralibs_avcodec="$avcodec_extralibs"
+extralibs_avformat="$avformat_extralibs"
+extralibs_avdevice="$avdevice_extralibs"
+extralibs_avfilter="$avfilter_extralibs"
+extralibs_postproc="$postproc_extralibs"
+extralibs_swscale="$swscale_extralibs"
+extralibs_swresample="$swresample_extralibs"
+EOF
+
+for lib in $LIBRARY_LIST; do
+    lib_deps="$(eval echo \$${lib}_deps)"
+    echo ${lib}_deps=\"$lib_deps\" >> $TMPH
+done
+
+cp_if_changed $TMPH ffbuild/config.sh