--- php-7.0.1/Zend/zend_portability.h.omv~	2015-12-29 03:38:23.186894098 +0100
+++ php-7.0.1/Zend/zend_portability.h	2015-12-29 03:38:48.437952703 +0100
@@ -183,7 +183,7 @@ char *alloca();
 # define ZEND_ATTRIBUTE_MALLOC
 #endif
 
-#if ZEND_GCC_VERSION >= 4003 || __has_attribute(alloc_size)
+#if (ZEND_GCC_VERSION >= 4003 && !defined(__clang__)) || __has_attribute(alloc_size)
 # define ZEND_ATTRIBUTE_ALLOC_SIZE(X) __attribute__ ((alloc_size(X)))
 # define ZEND_ATTRIBUTE_ALLOC_SIZE2(X,Y) __attribute__ ((alloc_size(X,Y)))
 #else