mesa: remove last DJGPP remains

[mesa.git] / include / c99_compat.h

diff --git a/include/c99_compat.h b/include/c99_compat.h
index 39f958fdfdda8b7405632cd48e62daa8167278f8..429c6014845ac3470cc3b14860c6503ea7ccd2b4 100644 (file)
--- a/include/c99_compat.h
+++ b/include/c99_compat.h
@@ -29,6 +29,35 @@
 #define _C99_COMPAT_H_
 
 
+/*
+ * MSVC hacks.
+ */
+#if defined(_MSC_VER)
+   /*
+    * Visual Studio 2012 will complain if we define the `inline` keyword, but
+    * actually it only supports the keyword on C++.
+    *
+    * To avoid this the _ALLOW_KEYWORD_MACROS must be set.
+    */
+#  if (_MSC_VER >= 1700) && !defined(_ALLOW_KEYWORD_MACROS)
+#    define _ALLOW_KEYWORD_MACROS
+#  endif
+
+   /*
+    * XXX: MSVC has a `__restrict` keyword, but it also has a
+    * `__declspec(restrict)` modifier, so it is impossible to define a
+    * `restrict` macro without interfering with the latter.  Furthermore the
+    * MSVC standard library uses __declspec(restrict) under the _CRTRESTRICT
+    * macro.  For now resolve this issue by redefining _CRTRESTRICT, but going
+    * forward we should probably should stop using restrict, especially
+    * considering that our code does not obbey strict aliasing rules any way.
+    */
+#  include <crtdefs.h>
+#  undef _CRTRESTRICT
+#  define _CRTRESTRICT
+#endif
+
+
 /*
  * C99 inline keyword
  */
@@ -102,4 +131,15 @@
 #endif
 
 
+/* Simple test case for debugging */
+#if 0
+static inline const char *
+test_c99_compat_h(const void * restrict a,
+                  const void * restrict b)
+{
+   return __func__;
+}
+#endif
+
+
 #endif /* _C99_COMPAT_H_ */