Index: benchmark/io/io_uring.h
===================================================================
--- benchmark/io/io_uring.h	(revision 665edf40670b0348b31fea1a21e2dd886e4125e2)
+++ benchmark/io/io_uring.h	(revision a2e4b0cd8f28d66ff183eebe6d8cf6d6d3858dd9)
@@ -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>