| # flock.m4 serial 4 | |
| dnl Copyright (C) 2008-2023 Free Software Foundation, Inc. | |
| dnl This file is free software; the Free Software Foundation | |
| dnl gives unlimited permission to copy and/or distribute it, | |
| dnl with or without modifications, as long as this notice is preserved. | |
| AC_DEFUN([gl_FUNC_FLOCK], | |
| [ | |
| AC_REQUIRE([gl_SYS_FILE_H_DEFAULTS]) | |
| AC_CHECK_FUNCS_ONCE([flock]) | |
| if test $ac_cv_func_flock = no; then | |
| HAVE_FLOCK=0 | |
| fi | |
| ]) | |
| dnl Prerequisites of lib/flock.c. | |
| AC_DEFUN([gl_PREREQ_FLOCK], | |
| [ | |
| AC_CHECK_FUNCS_ONCE([fcntl]) | |
| AC_CHECK_HEADERS_ONCE([unistd.h]) | |
| dnl Do we have a POSIX fcntl lock implementation? | |
| AC_CHECK_MEMBERS([struct flock.l_type],[],[],[[#include <fcntl.h>]]) | |
| ]) | |