3 dnl Copyright (C) 2003-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
10 dnl Prerequisites of lib/utimens.c.
11 AC_REQUIRE([gl_FUNC_UTIMES])
12 AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
13 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
14 gl_CHECK_FUNCS_ANDROID([futimes], [[#include <sys/time.h>]])
15 gl_CHECK_FUNCS_ANDROID([futimesat], [[#include <sys/time.h>]])
16 gl_CHECK_FUNCS_ANDROID([lutimes], [[#include <sys/time.h>]])
17 gl_CHECK_FUNCS_ANDROID([futimens], [[#include <sys/stat.h>]])
18 gl_CHECK_FUNCS_ANDROID([utimensat], [[#include <sys/stat.h>]])
20 if test $ac_cv_func_futimens = no && test $ac_cv_func_futimesat = yes; then
21 dnl FreeBSD 8.0-rc2 mishandles futimesat(fd,NULL,time). It is not
22 dnl standardized, but Solaris implemented it first and uses it as
23 dnl its only means to set fd time.
24 AC_CACHE_CHECK([whether futimesat handles NULL file],
25 [gl_cv_func_futimesat_works],
27 AC_RUN_IFELSE([AC_LANG_PROGRAM([[
29 #include <sys/times.h>
32 [[int fd = open ("conftest.file", O_RDWR);
34 if (futimesat (fd, NULL, NULL)) return 2;
36 [gl_cv_func_futimesat_works=yes],
37 [gl_cv_func_futimesat_works=no],
39 # Guess yes on Linux systems
40 # and on systems that emulate the Linux system calls.
41 linux* | midipix*) gl_cv_func_futimesat_works="guessing yes" ;;
42 # Guess yes on glibc systems.
43 *-gnu*) gl_cv_func_futimesat_works="guessing yes" ;;
44 # If we don't know, obey --enable-cross-guesses.
45 *) gl_cv_func_futimesat_works="$gl_cross_guess_normal" ;;
49 case "$gl_cv_func_futimesat_works" in
52 AC_DEFINE([FUTIMESAT_NULL_BUG], [1],
53 [Define to 1 if futimesat mishandles a NULL file name.])