From 04eab8e1f88a717423d4a2662129ab0dce333fe1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Mellstr=C3=B6m?= <bjorn.mellstrom@radinn.com>
Date: Thu, 3 Jun 2021 12:51:27 +0200
Subject: [PATCH] Add guard around _GNU_SOURCE define

This avoids warnings if the define has already been set by the
build system.
---
 src/include/general.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/include/general.h b/src/include/general.h
index ba86da2..84a3d0a 100644
--- a/src/include/general.h
+++ b/src/include/general.h
@@ -21,7 +21,9 @@
 #ifndef __GENERAL_H
 #define __GENERAL_H
 
-#define _GNU_SOURCE
+#if !defined(_GNU_SOURCE)
+# define _GNU_SOURCE
+#endif
 #if !defined(__USE_MINGW_ANSI_STDIO)
 # define __USE_MINGW_ANSI_STDIO 1
 #endif