Completely disable the declarations for malloc() and friends. Use
#ifdef though, so if you still need these for a really backwards
compiler you know what to do.
diff --git a/Include/mymalloc.h b/Include/mymalloc.h
index e55fe7b..b65523e 100644
--- a/Include/mymalloc.h
+++ b/Include/mymalloc.h
@@ -67,12 +67,13 @@
#pragma lib_export on
#endif
-#ifndef HAVE_STDLIB_H
+/* The following should never be necessary */
+#ifdef NEED_TO_DECLARE_MALLOC_AND_FRIEND
extern ANY *malloc Py_PROTO((size_t));
extern ANY *calloc Py_PROTO((size_t, size_t));
extern ANY *realloc Py_PROTO((ANY *, size_t));
extern void free Py_PROTO((ANY *)); /* XXX sometimes int on Unix old systems */
-#endif /* !HAVE_STDLIB */
+#endif
#ifndef NULL
#define NULL ((ANY *)0)