From 7b34fcc4874671dc92413fa1a091eafac4191cee Mon Sep 17 00:00:00 2001
From: =?utf8?q?Kristian=20H=C3=B8gsberg?= <krh@bitplanet.net>
Date: Wed, 8 Sep 2010 20:34:07 -0400
Subject: [PATCH] configure: Enable -fvisibility=hidden for g++ as well

---
 configure.ac | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure.ac b/configure.ac
index a7ee0f5763c..bf8feb63528 100644
--- a/configure.ac
+++ b/configure.ac
@@ -155,6 +155,13 @@ fi
 if test "x$GXX" = xyes; then
     CXXFLAGS="$CXXFLAGS -Wall"
 
+    # Enable -fvisibility=hidden if using a gcc that supports it
+    save_CXXFLAGS="$CXXFLAGS"
+    AC_MSG_CHECKING([whether $CXX supports -fvisibility=hidden])
+    CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
+    AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]),
+		   [CXXFLAGS="$save_CXXFLAGS" ; AC_MSG_RESULT([no])]);
+
     # Work around aliasing bugs - developers should comment this out
     CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"
 fi
-- 
2.30.2