Make compile with gcc 4.7 work

mojo/public/c/system/macros.h

Index: mojo/public/c/system/macros.h
diff --git a/mojo/public/c/system/macros.h b/mojo/public/c/system/macros.h
index ae88249ec6411d6b0ccf0f3d828d184fccff2de0..ff772f7f489d3a89bdefa965e80ade65dff65d56 100644
--- a/mojo/public/c/system/macros.h
+++ b/mojo/public/c/system/macros.h
@@ -73,7 +73,8 @@ namespace mojo { template <bool> struct CompileAssert {}; }
 // Unlike the C++11 |alignas()|, |alignment| must be an integer. It may not be a
 // type, nor can it be an expression like |MOJO_ALIGNOF(type)| (due to the
 // non-C++11 MSVS version).
-#if __cplusplus >= 201103L
+#if __cplusplus >= 201103L && \
+    (defined(__clang__) || (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 >= 40800))

[viettrungluu, 2014/07/29 17:47:28]

What about future versions of MSVC? This would be another thing to update.

Why is gcc 4.7 claiming to support C++11 if it in fact doesn't?

 #define MOJO_ALIGNAS(alignment) alignas(alignment)
 #elif defined(__GNUC__)
 #define MOJO_ALIGNAS(alignment) __attribute__((aligned(alignment)))