From 98bddfefc1773dc9a0f3771eb65224c26ee66281 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 23 Dec 2017 16:17:57 +0000
Subject: undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P on GCC 4.8

GCC 4.8 with optimization causes error if it compiles following code.
[Bug #14221]

```c
__builtin_choose_expr(__builtin_constant_p(b),0,1)
```

https://github.com/ruby/ruby/pull/1778

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61429 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 include/ruby/ruby.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'include/ruby/ruby.h')

diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index 56aca0db5f..7c1b909113 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -26,15 +26,17 @@ extern "C" {
 #include RUBY_EXTCONF_H
 #endif
 
+#include "defines.h"
+
 #if defined(__cplusplus)
 /* __builtin_choose_expr and __builtin_types_compatible aren't available
  * on C++.  See https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html */
 # undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
 # undef HAVE_BUILTIN___BUILTIN_TYPES_COMPATIBLE_P
+#elif GCC_VERSION_BEFORE(4,8,6) /* Bug #14221 */
+# undef HAVE_BUILTIN___BUILTIN_CHOOSE_EXPR_CONSTANT_P
 #endif
 
-#include "defines.h"
-
 #ifndef ASSUME
 # ifdef UNREACHABLE
 #   define ASSUME(x) (RB_LIKELY(!!(x)) ? (void)0 : UNREACHABLE)
-- 
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