From 3b00162fa1574e4aab6df15ef757bb36b8d4b958 Mon Sep 17 00:00:00 2001
From: Jay Foad <jay.foad@gmail.com>
Date: Fri, 15 May 2009 18:13:31 +0000
Subject: [PATCH] Work around the fact that GNU libstdc++'s debug mode uses
 RTTI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71871 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Makefile.rules | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile.rules b/Makefile.rules
index 41694bd1ff1..23ffe3ea960 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -375,6 +375,12 @@ ifeq ($(OS),MingW)
   endif
 endif
 
+ifdef ENABLE_EXPENSIVE_CHECKS
+  # GNU libstdc++ uses RTTI if you define _GLIBCXX_DEBUG, which we did above.
+  # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40160
+  CXX.Flags := $(filter-out -fno-rtti,$(CXX.Flags))
+endif
+
 #--------------------------------------------------------------------
 # Directory locations
 #--------------------------------------------------------------------