Use glib no-return macro

spawn-fcgi.c

@@ -24,10 +24,6 @@
 
 #define FCGI_LISTENSOCK_FILENO 0
 
-#ifndef __GNUC__
-#  define  __attribute__(x)  /*NOTHING*/
-#endif
-
 #ifdef USE_LIMITS
 int pam_set_limits(const char *conf_file, const char *username);
 #endif
@@ -421,7 +417,7 @@ waitforchild:
 	}
 }
 
-void start() __attribute__((noreturn));
+void start() G_GNUC_NORETURN;
 void start() {
 	int save_err_fileno = -1;
 	move2fd(data.socket, FCGI_LISTENSOCK_FILENO);