configure: add configure check for GCC -Wold-style-definition
Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
diff --git a/m4/ltp-warn_oldstyle.m4 b/m4/ltp-warn_oldstyle.m4
new file mode 100644
index 0000000..02a9602
--- /dev/null
+++ b/m4/ltp-warn_oldstyle.m4
@@ -0,0 +1,37 @@
+dnl Copyright (c) 2014 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 Author: Alexey Kodanev <alexey.kodanev@oracle.com>
+dnl
+
+AC_DEFUN([LTP_CHECK_CC_WARN_OLDSTYLE],[dnl
+
+AC_MSG_CHECKING([if $CC supports -Wold-style-definition])
+
+backup_cflags="$CFLAGS"
+CFLAGS="-Wold-style-definition"
+
+AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([])],
+ [GCC_WARN_OLDSTYLE="$CFLAGS"]
+ [AC_MSG_RESULT([yes])],
+ [AC_MSG_RESULT([no])]
+)
+
+AC_SUBST(GCC_WARN_OLDSTYLE)
+CFLAGS="$backup_cflags"
+
+])