Added SDL_VARIABLE_LENGTH_ARRAY so this #ifdef is localized to one place.

--HG--
extra : rebase_source : d3e161c0ca22ae672ad540a4febef47e141e37c1

src/SDL_internal.h

@@ -26,6 +26,15 @@
 #define _GNU_SOURCE
 #endif
 
+/* This is for a variable-length array at the end of a struct:
+    struct x { int y; char z[SDL_VARIABLE_LENGTH_ARRAY]; };
+   Use this because GCC 2 needs different magic than other compilers. */
+#if (defined(__GNUC__) && (__GNUC__ <= 2))
+#define SDL_VARIABLE_LENGTH_ARRAY 1
+#else
+#define SDL_VARIABLE_LENGTH_ARRAY
+#endif
+
 #include "dynapi/SDL_dynapi.h"
 
 #if SDL_DYNAMIC_API