SDL_config.h.cmake, SDL_config.h.in: update for SIZEOF_VOIDP define

include/SDL_config.h.cmake

@@ -38,7 +38,7 @@
 
 /* C datatypes */
 /* Define SIZEOF_VOIDP for 64/32 architectures */
-#ifdef __LP64__
+#if defined(__LP64__) || defined(_LP64) || defined(_WIN64)
 #define SIZEOF_VOIDP 8
 #else
 #define SIZEOF_VOIDP 4

include/SDL_config.h.in

@@ -42,11 +42,12 @@
 #undef volatile
 
 /* C datatypes */
-#ifdef __LP64__
+#if defined(__LP64__) || defined(_LP64) || defined(_WIN64)
 #define SIZEOF_VOIDP 8
 #else
 #define SIZEOF_VOIDP 4
 #endif
+
 #undef HAVE_GCC_ATOMICS
 #undef HAVE_GCC_SYNC_LOCK_TEST_AND_SET