From a7ed7a979e15c5bad2515d91db57b034b4d26bef Mon Sep 17 00:00:00 2001
From: M374LX <wilsalx@gmail.com>
Date: Sat, 2 Dec 2023 19:22:17 -0300
Subject: [PATCH] Check if _GNU_SOURCE is already defined

---
 src/posix_poll.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/posix_poll.c b/src/posix_poll.c
index a5016a1304..0628cd0c86 100644
--- a/src/posix_poll.c
+++ b/src/posix_poll.c
@@ -26,7 +26,9 @@
 // It is fine to use C99 in this file because it will not be built with VS
 //========================================================================
 
+#ifndef _GNU_SOURCE
 #define _GNU_SOURCE
+#endif
 
 #include "internal.h"