[LTP] [PATCH V2 1/3] autoconf check for utimensat(2)

[Stanislav K. <sta...@or...>]

Unfortunately, not all distributions have utimensat(2) defined (old glibc),
so we need a way to check it in our code.

Signed-off-by: Stanislav Kholmanskikh <sta...@or...>
---
 configure.ac        |    1 +
 m4/ltp-utimensat.m4 |   44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 0 deletions(-)
 create mode 100644 m4/ltp-utimensat.m4

diff --git a/configure.ac b/configure.ac
index 4846afd..4af7662 100644
--- a/configure.ac
+++ b/configure.ac
@@ -162,6 +162,7 @@ LTP_CHECK_SYSCALL_NUMA
 LTP_CHECK_SYSCALL_QUOTACTL
 LTP_CHECK_SYSCALL_SIGNALFD
 LTP_CHECK_SYSCALL_UNSHARE
+LTP_CHECK_SYSCALL_UTIMENSAT
 LTP_CHECK_TASKSTATS
 LTP_CHECK_TIME
 LTP_CHECK_MADVISE
diff --git a/m4/ltp-utimensat.m4 b/m4/ltp-utimensat.m4
new file mode 100644
index 0000000..1f9a055
--- /dev/null
+++ b/m4/ltp-utimensat.m4
@@ -0,0 +1,44 @@
+dnl
+dnl Copyright (c) 2013 Oracle and/or its affiliates. All Rights Reserved.
+dnl
+dnl This program is free software; you can redistribute it and/or
+dnl modify it under the terms of the GNU General Public License as
+dnl published by the Free Software Foundation; either version 2 of
+dnl the License, or (at your option) any later version.
+dnl
+dnl This program is distributed in the hope that it would be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write the Free Software Foundation,
+dnl Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+dnl
+
+dnl
+dnl LTP_CHECK_SYSCALL_UTIMENSAT
+dnl ----------------------------
+dnl
+AC_DEFUN([LTP_CHECK_SYSCALL_UTIMENSAT],[
+	AC_MSG_CHECKING([for utimensat])
+	AC_LINK_IFELSE([AC_LANG_SOURCE([
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+int main(void) {
+	long tv_nsec;
+	tv_nsec = UTIME_NOW;
+	tv_nsec = UTIME_OMIT;
+
+	return utimensat(AT_FDCWD, NULL, NULL, 0);
+}])],[has_utimensat="yes"])
+
+if test "x$has_utimensat" = "xyes"; then
+	AC_DEFINE(HAVE_UTIMENSAT, 1, [Define to 1 if you have utimensat(2)])
+	AC_MSG_RESULT(yes)
+else
+	AC_MSG_RESULT(no)
+fi
+])
-- 
1.7.1