--- Source/WTF/wtf/Platform.h.orig	2015-01-06 13:30:52.000000000 -0800
+++ Source/WTF/wtf/Platform.h	2015-01-06 13:42:15.000000000 -0800
@@ -590,11 +590,14 @@
 
 #if OS(DARWIN)
 
+#if __MAC_OS_X_VERSION_MIN_REQUIRED >= 1060 || PLATFORM(IOS)
 #define HAVE_DISPATCH_H 1
-#define HAVE_MADV_FREE 1
 #define HAVE_MADV_FREE_REUSE 1
-#define HAVE_MERGESORT 1
 #define HAVE_PTHREAD_SETNAME_NP 1
+#endif
+
+#define HAVE_MADV_FREE 1
+#define HAVE_MERGESORT 1
 #define HAVE_READLINE 1
 #define HAVE_SYS_TIMEB_H 1
 #define WTF_USE_ACCELERATE 1