diff -ru gcc/libffi/src/arm/ffi.c gcc+iPhone/libffi/src/arm/ffi.c
--- gcc/libffi/src/arm/ffi.c	2007-09-04 17:52:45.000000000 +0000
+++ gcc+iPhone/libffi/src/arm/ffi.c	2010-11-23 23:18:14.000000000 +0000
@@ -270,6 +270,10 @@
   return;
 }
 
+#ifdef __APPLE__
+#define __clear_cache(a, b)
+#endif
+
 /* How to make a trampoline.  */
 
 #define FFI_INIT_TRAMPOLINE(TRAMP,FUN,CTX)				\