From f32823f7ec7bc50c8c610fa212aa86ce9a201031 Mon Sep 17 00:00:00 2001
From: Moody Liu <mooodyhunter@outlook.com>
Date: Mon, 11 Dec 2023 18:33:44 +0000
Subject: [PATCH] make sure _GNU_SOURCE is defined

need to get CBAUD, etc.
---
 options/posix/generic/termios-stubs.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/options/posix/generic/termios-stubs.cpp b/options/posix/generic/termios-stubs.cpp
index 633f1a9a3a..631456aa53 100644
--- a/options/posix/generic/termios-stubs.cpp
+++ b/options/posix/generic/termios-stubs.cpp
@@ -1,3 +1,6 @@
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
 
 #include <errno.h>
 #include <termios.h>