From 925a2fe55cbe25fc700972b51e7aa84a5fd18f65 Mon Sep 17 00:00:00 2001
From: Parthasarathy Bhuvaragan <parthasarathy.xx.bhuvaragan@ericsson.com>
Date: Mon, 16 Feb 2015 14:57:36 +0100
Subject: ID:370 - add anonymous union support in CFLAGS for older gcc

In older GCC versions when an element in an anonymous unions/structures are
addressed by name, gcc must use -fms-extensions.

Change-Id: Id80617ad9336c7a02fbe613b58e3f337fa4baeee
Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.xx.bhuvaragan@ericsson.com>
---
 configure.ac | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index d7c5620..a425bf5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -130,6 +130,24 @@ if test "x$xenable_all_options" = "xyes" || test "x$xenable_solaris_opt" = "xyes
 	AC_DEFINE(ENABLE_ALL_OPTIONS, [1], [Define to 1 to enable all command line options.])
 fi
 
+dnl Determine anonymous union/structure support in GCC
+AC_TRY_COMPILE([
+#include <stdio.h>
+	], [
+	struct test {
+		union {
+			int a;
+			unsigned int b;
+		};
+	} test;
+
+	printf("a is %d", test.a);
+        ], ac_need_fms_extension=no, ac_need_fms_extension=yes)
+if test "x$ac_need_fms_extension" = "xyes"; then
+       CFLAGS="$CFLAGS -fms-extensions"
+       AC_SUBST(CFLAGS)
+fi
+
 dnl check for OpenSSL functionality
 AC_ARG_ENABLE([internal-md5],
 	[AC_HELP_STRING([--enable-internal-md5],
-- 
cgit v1.2.1