- This will save some memory w/ GCC compilers on some platforms

1 files changed, 5 insertions, 1 deletions

diff --git a/Zend/zend_alloc.h b/Zend/zend_alloc.h
index e1674612c4..99c3db12c0 100644
--- a/Zend/zend_alloc.h
+++ b/Zend/zend_alloc.h
@@ -54,8 +54,12 @@ typedef union _align_test {
 
 #define MAX_CACHED_MEMORY   64
 #define MAX_CACHED_ENTRIES	16
-
+#if (defined (__GNUC__) && __GNUC__ >= 2)
+#define PLATFORM_ALIGNMENT (__alignof__ (zend_mem_header))
+#else
 #define PLATFORM_ALIGNMENT (sizeof(align_test))
+#endif
+
 #define PLATFORM_PADDING (((PLATFORM_ALIGNMENT-sizeof(zend_mem_header))%PLATFORM_ALIGNMENT+PLATFORM_ALIGNMENT)%PLATFORM_ALIGNMENT)
 
 ZEND_API char *zend_strndup(const char *s, unsigned int length);