Check GCC for __has_attribute

The __has_attribute macro was one of improvements in GCC 5 release. See https://gcc.gnu.org/gcc-5/changes.html. This checks to make it work with older GCC. BUG=angleproject:2119 Change-Id: I751249b9d028d1322829bebc1ca8d423edf27057 Reviewed-on: https://chromium-review.googlesource.com/599152 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

Check GCC for __has_attribute
3c76d59f · jchen10 · Commit Bot · 188fd5f6 · 3c76d59f
Commit 3c76d59f authored Aug 03, 2017 by jchen10 Committed by Commit Bot Aug 07, 2017
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angleutils.h src/common/angleutils.h +1 -1

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--- a/src/common/angleutils.h
+++ b/src/common/angleutils.h
@@ -255,7 +255,7 @@ std::string ToString(const T &value)
    }

 // The below inlining code lifted from V8.
-#if defined(__clang__) || defined(__GNUC__)
+#if defined(__clang__) || (defined(__GNUC__) && defined(__has_attribute))
 #define ANGLE_HAS_ATTRIBUTE_ALWAYS_INLINE (__has_attribute(always_inline))
 #define ANGLE_HAS___FORCEINLINE 0
 #elif defined(_MSC_VER)