From 69ac7b0cf88b202da0a770a12fa210f2441e35d0 Mon Sep 17 00:00:00 2001
From: Yang Tse <yangsita@gmail.com>
Date: Mon, 16 Nov 2009 23:01:37 +0000
Subject: [PATCH] Add icc fvisibility bug test

---
 ares/m4/cares-compilers.m4 | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/ares/m4/cares-compilers.m4 b/ares/m4/cares-compilers.m4
index 715c31eb8..aef46f172 100644
--- a/ares/m4/cares-compilers.m4
+++ b/ares/m4/cares-compilers.m4
@@ -16,7 +16,7 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 61
+# serial 63
 
 
 dnl CARES_CHECK_COMPILER
@@ -1340,9 +1340,20 @@ AC_DEFUN([CARES_CHECK_COMPILER_SYMBOL_HIDING], [
       dnl Only icc 9.0 or later
       if test "$compiler_num" -ge "900"; then
         if $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then
-          tmp_EXTERN="__attribute__ ((visibility (\"default\")))"
-          tmp_CFLAGS="-fvisibility=hidden"
-          supports_symbol_hiding="yes"
+          tmp_save_CFLAGS="$CFLAGS"
+          CFLAGS="$CFLAGS -fvisibility=hidden"
+          AC_LINK_IFELSE([
+            AC_LANG_PROGRAM([[
+#             include <stdio.h>
+            ]],[[
+              printf("icc fvisibility bug test");
+            ]])
+          ],[
+            tmp_EXTERN="__attribute__ ((visibility (\"default\")))"
+            tmp_CFLAGS="-fvisibility=hidden"
+            supports_symbol_hiding="yes"
+          ])
+          CFLAGS="$tmp_save_CFLAGS"
         fi
       fi
       ;;