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- # flock.m4 serial 3
- dnl Copyright (C) 2008-2014 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_HEADER_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>]])
- ])
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