1 dnl Copyright (C) 2003-2013 Free Software Foundation, Inc.
2 dnl This file is free software; the Free Software Foundation
3 dnl gives unlimited permission to copy and/or distribute it,
4 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([gl_CHECK_TYPE_STRUCT_UTIMBUF])
14 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
15 AC_CHECK_FUNCS_ONCE([futimes futimesat futimens utimensat lutimes])
17 if test $ac_cv_func_futimens = no && test $ac_cv_func_futimesat = yes; then
18 dnl FreeBSD 8.0-rc2 mishandles futimesat(fd,NULL,time). It is not
19 dnl standardized, but Solaris implemented it first and uses it as
20 dnl its only means to set fd time.
21 AC_CACHE_CHECK([whether futimesat handles NULL file],
22 [gl_cv_func_futimesat_works],
24 AC_RUN_IFELSE([AC_LANG_PROGRAM([[
26 #include <sys/times.h>
28 ]], [[ int fd = open ("conftest.file", O_RDWR);
30 if (futimesat (fd, NULL, NULL)) return 2;
32 [gl_cv_func_futimesat_works=yes],
33 [gl_cv_func_futimesat_works=no],
35 # Guess yes on glibc systems.
36 *-gnu*) gl_cv_func_futimesat_works="guessing yes" ;;
37 # If we don't know, assume the worst.
38 *) gl_cv_func_futimesat_works="guessing no" ;;
42 case "$gl_cv_func_futimesat_works" in
45 AC_DEFINE([FUTIMESAT_NULL_BUG], [1],
46 [Define to 1 if futimesat mishandles a NULL file name.])