From 165ebcb4675f7fc5cd536da586835a6cf46e0da3 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 26 Sep 2013 06:06:19 +0000
Subject: Fix compilation on gcc 4.6

if __has_feature is not defined, it can't compile

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43048 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 gc.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/gc.c b/gc.c
index e2321c3394..34c06a8941 100644
--- a/gc.c
+++ b/gc.c
@@ -31,8 +31,12 @@
 #include <sys/types.h>
 #include <assert.h>
 
-#if /* is ASAN enabled? */ defined(__has_feature) ? \
-    __has_feature(address_sanitizer) /* Clang */ : \
+#ifndef __has_feature
+# define __has_feature(x) 0
+#endif
+
+#if /* is ASAN enabled? */ \
+    __has_feature(address_sanitizer) /* Clang */ || \
     defined(__SANITIZE_ADDRESS__)  /* GCC 4.8.x */
   #define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS \
         __attribute__((no_address_safety_analysis)) \
-- 
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