Patched to compile on Visual Studio.
diff --git a/src/stdlib/SDL_qsort.c b/src/stdlib/SDL_qsort.c
index b0a662f..8aa403f 100644
--- a/src/stdlib/SDL_qsort.c
+++ b/src/stdlib/SDL_qsort.c
@@ -27,6 +27,9 @@ SDL_qsort(void *base, size_t nmemb, size_t size, int (*compare) (const void *, c
#define _PDCLIB_size_t size_t
#endif
+#ifdef qsort
+#undef qsort
+#endif
#define qsort SDL_qsort
#define inline SDL_INLINE