Switched back to configure generating SDL_config.h

It was very confusing to have configure generate an SDL_config.h and then not have it be used when building on Mac OS X or Windows.  I'll just have to remember to use SDL_config_windows.h when building official releases that are supposed to be ABI compatible with Visual Studio.

--HG--
rename : include/SDL_config_generated.h.in => include/SDL_config.h.in

include/SDL_config.h

@@ -40,13 +40,12 @@
 #elif defined(__NINTENDODS__)
 #include "SDL_config_nintendods.h"
 #else
-#ifdef MINIMAL_CONFIG_H
 /* This is a minimal configuration just to get SDL running on new platforms */
 #include "SDL_config_minimal.h"
-#else
-/* This is generated by configure for your platform */
-#include "SDL_config_generated.h"
-#endif
 #endif /* platform config */
 
+#ifdef USING_GENERATED_CONFIG_H
+#error Wrong SDL_config.h, check your include path?
+#endif
+
 #endif /* _SDL_config_h */

include/SDL_config.h.in

@@ -19,8 +19,8 @@
   3. This notice may not be removed or altered from any source distribution.
 */
 
-#ifndef _SDL_config_generated_h
-#define _SDL_config_generated_h
+#ifndef _SDL_config_h
+#define _SDL_config_h
 
 /**
  *  \file SDL_config.h.in
@@ -297,4 +297,4 @@
 #undef SDL_ASSEMBLY_ROUTINES
 #undef SDL_ALTIVEC_BLITTERS
 
-#endif /* _SDL_config_generated_h */
+#endif /* _SDL_config_h */