Try fixing GCC version detection

Author: morrisonlevi

Zend/zend_atomic.h

@@ -23,21 +23,22 @@
 #define __has_feature(x) 0
 #endif
 
-#ifndef __GNUC_PREREQ__
-#define __GNUC_PREREQ__(x, y) 0
-#endif
+#define ZEND_GCC_PREREQ(x, y) \
+	((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || (__GNUC__ > (x)))
 
 /* Builtins are used to avoid library linkage */
 #if __has_feature(c_atomic)
 #define	HAVE_C11_ATOMICS 1
-#elif __GNUC_PREREQ__(4, 7)
+#elif ZEND_GCC_PREREQ(4, 7)
 #define	HAVE_GNUC_ATOMICS 1
 #elif defined(__GNUC__)
 #define	HAVE_SYNC_ATOMICS 1
 #elif !defined(ZEND_WIN32)
 #define HAVE_NO_ATOMICS 1
 #endif
 
+#undef ZEND_GCC_PREREQ
+
 /* Treat zend_atomic_* types as opaque. They have definitions only for size
  * and alignment purposes.
  */