Index: benchmark/io/io_uring.h
===================================================================
--- benchmark/io/io_uring.h	(revision 73d0c54af784665c5c3ce11b23b768fd61404a8d)
+++ benchmark/io/io_uring.h	(revision 11ad42ff7d5390314633769f10ba100d0b136eb5)
@@ -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>