--- Libc/Libc-997.90.3/include/alloca.h
+++ Libc/Libc-583/include/alloca.h
@@ -26,7 +26,11 @@
 
 #include <sys/cdefs.h>
 #include <_types.h>
-#include <sys/_types/_size_t.h>
+
+#ifndef	_SIZE_T
+#define	_SIZE_T
+typedef	__darwin_size_t	size_t;
+#endif
 
 __BEGIN_DECLS
 void	*alloca(size_t);		/* built-in for gcc */