Discovered warn_not_available and used it.

ext/standard/basic_functions.c

@@ -432,6 +432,8 @@ function_entry basic_functions[] = {
 	PHP_FE(socket_set_blocking,	NULL)
 #if HAVE_PHP_STREAM
 	PHP_FE(fopenstream,			NULL)
+#else
+	PHP_FALIAS(fopenstream, warn_not_available,      NULL)
 #endif
 #if HAVE_SYS_TIME_H
 	PHP_FE(socket_set_timeout,	NULL)

ext/standard/file.c

@@ -576,9 +576,9 @@ PHP_NAMED_FUNCTION(php_if_tmpfile)
 }
 /* }}} */
 
+#if HAVE_PHP_STREAM
 PHP_FUNCTION(fopenstream)
 {
-#if HAVE_PHP_STREAM
 	zval ** zfilename, ** zmode;
 	php_stream * stream;
 
@@ -595,11 +595,8 @@ PHP_FUNCTION(fopenstream)
 		RETURN_FALSE;
 	}
 	ZEND_REGISTER_RESOURCE(return_value, stream, le_stream);
-#else
-	zend_error(E_ERROR, "%s(): no stream support in this PHP build", get_active_function_name());
-	RETURN_FALSE;
-#endif
 }
+#endif
 
 /* {{{ proto int fopen(string filename, string mode [, int use_include_path])
    Open a file or a URL and return a file pointer */