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/defines.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

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

diff --git a/include/ruby/defines.h b/include/ruby/defines.h
index 84aca93856..2c72a7cb8a 100644
--- a/include/ruby/defines.h
+++ b/include/ruby/defines.h
@@ -72,6 +72,17 @@ extern "C" {
 #  define GCC_VERSION_SINCE(major, minor, patchlevel) 0
 # endif
 #endif
+#ifndef GCC_VERSION_BEFORE
+# if defined(__GNUC__) && !defined(__INTEL_COMPILER) && !defined(__clang__)
+#  define GCC_VERSION_BEFORE(major, minor, patchlevel) \
+    ((__GNUC__ < (major)) ||  \
+     ((__GNUC__ == (major) && \
+       ((__GNUC_MINOR__ < (minor)) || \
+        (__GNUC_MINOR__ == (minor) && __GNUC_PATCHLEVEL__ <= (patchlevel))))))
+# else
+#  define GCC_VERSION_BEFORE(major, minor, patchlevel) 0
+# endif
+#endif
 
 /* likely */
 #if __GNUC__ >= 3
-- 
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