1 dnl Copyright (C) 2003-2010 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.
12 dnl Prerequisites of lib/utimens.c.
13 AC_REQUIRE([gl_FUNC_UTIMES])
14 AC_REQUIRE([gl_CHECK_TYPE_STRUCT_TIMESPEC])
15 AC_REQUIRE([gl_CHECK_TYPE_STRUCT_UTIMBUF])
16 AC_CHECK_FUNCS_ONCE([futimes futimesat futimens utimensat lutimes])
18 if test $ac_cv_func_futimens = no && test $ac_cv_func_futimesat = yes; then
19 dnl FreeBSD 8.0-rc2 mishandles futimesat(fd,NULL,time). It is not
20 dnl standardized, but Solaris implemented it first and uses it as
21 dnl its only means to set fd time.
22 AC_CACHE_CHECK([whether futimesat handles NULL file],
23 [gl_cv_func_futimesat_works],
25 AC_RUN_IFELSE([AC_LANG_PROGRAM([[
27 #include <sys/times.h>
28 ]], [[ int fd = open ("conftest.file", O_RDWR);
30 if (futimesat (fd, NULL, NULL)) return 2;
32 [gl_cv_func_futimesat_works=yes],
33 [gl_cv_func_futimesat_works=no],
34 [gl_cv_func_futimesat_works="guessing no"])
36 if test "$gl_cv_func_futimesat_works" != yes; then
37 AC_DEFINE([FUTIMESAT_NULL_BUG], [1],
38 [Define to 1 if futimesat mishandles a NULL file name.])