Index: benchmark/io/io_uring.h
===================================================================
--- benchmark/io/io_uring.h	(revision 665edf40670b0348b31fea1a21e2dd886e4125e2)
+++ benchmark/io/io_uring.h	(revision fe18b46d7a80d743842002e3565a3f0e9fc6a0a4)
@@ -1,6 +1,3 @@
 extern "C" {
-	#ifndef _GNU_SOURCE         /* See feature_test_macros(7) */
-	#define _GNU_SOURCE         /* See feature_test_macros(7) */
-	#endif
 	#include <errno.h>
 	#include <stdio.h>