scons: Define _ALLOW_KEYWORD_MACROS on MSVC builds.
scons/llvm.py defines inline globally to workaround issues with LLVM C
binding headers, so the only way to is to avoid
aggravating xkeycheck.h errors is to set _ALLOW_KEYWORD_MACROS.
This fixes MSVC 2012 build with LLVM.
Reviewed-by: Brian Paul <brianp@vmware.com>
diff --git a/include/c99_compat.h b/include/c99_compat.h
index 3a9f502..429c601 100644
--- a/include/c99_compat.h
+++ b/include/c99_compat.h
@@ -37,12 +37,10 @@
* Visual Studio 2012 will complain if we define the `inline` keyword, but
* actually it only supports the keyword on C++.
*
- * We could skip this check by defining _ALLOW_KEYWORD_MACROS, but there is
- * probably value in checking this for other keywords. So simply include
- * the checking before we define it below.
+ * To avoid this the _ALLOW_KEYWORD_MACROS must be set.
*/
-# if _MSC_VER >= 1700
-# include <xkeycheck.h>
+# if (_MSC_VER >= 1700) && !defined(_ALLOW_KEYWORD_MACROS)
+# define _ALLOW_KEYWORD_MACROS
# endif
/*