--- php-5.1.4/configure.in.gnusrc
+++ php-5.1.4/configure.in
@@ -39,6 +39,8 @@
 
 AC_CONFIG_HEADER(main/php_config.h)
 
+AC_DEFINE([_GNU_SOURCE], 1, [Define to enable GNU C Library extensions])
+
 MAJOR_VERSION=5
 MINOR_VERSION=1
 RELEASE_VERSION=4
--- php-5.1.4/ext/standard/file.c.gnusrc
+++ php-5.1.4/ext/standard/file.c
@@ -118,7 +118,6 @@
 
 #ifdef HAVE_FNMATCH
 #ifndef _GNU_SOURCE
-#define _GNU_SOURCE
 #endif
 #include <fnmatch.h>
 #endif
--- php-5.1.4/ext/interbase/interbase.c.gnusrc
+++ php-5.1.4/ext/interbase/interbase.c
@@ -24,7 +24,6 @@
 #include "config.h"
 #endif
 
-#define _GNU_SOURCE
 
 #include "php.h"
 
--- php-5.1.4/ext/zlib/zlib_fopen_wrapper.c.gnusrc
+++ php-5.1.4/ext/zlib/zlib_fopen_wrapper.c
@@ -19,7 +19,6 @@
 
 /* $Id$ */
 
-#define _GNU_SOURCE
 
 #include "php.h"
 #include "php_zlib.h"
--- php-5.1.4/ext/pdo_firebird/firebird_driver.c.gnusrc
+++ php-5.1.4/ext/pdo_firebird/firebird_driver.c
@@ -22,7 +22,6 @@
 #include "config.h"
 #endif
 
-#define _GNU_SOURCE
 
 #include "php.h"
 #include "php_ini.h"
--- php-5.1.4/main/php.h.gnusrc
+++ php-5.1.4/main/php.h
@@ -30,6 +30,7 @@
 #define PHP_HAVE_STREAMS
 #define YYDEBUG 0
 
+#include "php_config.h"
 #include "php_version.h"
 #include "zend.h"
 #include "zend_qsort.h"
--- php-5.1.4/main/streams/memory.c.gnusrc
+++ php-5.1.4/main/streams/memory.c
@@ -18,7 +18,6 @@
 
 /* $Id$ */
 
-#define _GNU_SOURCE
 #include "php.h"
 
 /* Memory streams use a dynamic memory buffer to emulate a stream.
--- php-5.1.4/main/streams/streams.c.gnusrc
+++ php-5.1.4/main/streams/streams.c
@@ -21,7 +21,6 @@
 
 /* $Id$ */
 
-#define _GNU_SOURCE
 #include "php.h"
 #include "php_globals.h"
 #include "php_network.h"
--- php-5.1.4/main/streams/cast.c.gnusrc
+++ php-5.1.4/main/streams/cast.c
@@ -18,7 +18,6 @@
 
 /* $Id$ */
 
-#define _GNU_SOURCE
 #include "php.h"
 #include "php_globals.h"
 #include "php_network.h"