| 1 | # flock.m4 serial 3 |
| 2 | dnl Copyright (C) 2008-2014 Free Software Foundation, Inc. |
| 3 | dnl This file is free software; the Free Software Foundation |
| 4 | dnl gives unlimited permission to copy and/or distribute it, |
| 5 | dnl with or without modifications, as long as this notice is preserved. |
| 6 | |
| 7 | AC_DEFUN([gl_FUNC_FLOCK], |
| 8 | [ |
| 9 | AC_REQUIRE([gl_HEADER_SYS_FILE_H_DEFAULTS]) |
| 10 | AC_CHECK_FUNCS_ONCE([flock]) |
| 11 | if test $ac_cv_func_flock = no; then |
| 12 | HAVE_FLOCK=0 |
| 13 | fi |
| 14 | ]) |
| 15 | |
| 16 | dnl Prerequisites of lib/flock.c. |
| 17 | AC_DEFUN([gl_PREREQ_FLOCK], |
| 18 | [ |
| 19 | AC_CHECK_FUNCS_ONCE([fcntl]) |
| 20 | AC_CHECK_HEADERS_ONCE([unistd.h]) |
| 21 | |
| 22 | dnl Do we have a POSIX fcntl lock implementation? |
| 23 | AC_CHECK_MEMBERS([struct flock.l_type],[],[],[[#include <fcntl.h>]]) |
| 24 | ]) |