From 29fe4241a8efc44f454919fa4578211434cf309a Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Mon, 27 May 2019 11:47:07 +1000
Subject: [PATCH] waf: use C11 for C files

needed for AP_Periph
---
 Tools/ardupilotwaf/boards.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Tools/ardupilotwaf/boards.py b/Tools/ardupilotwaf/boards.py
index 5904b49597..7ff1f52a26 100644
--- a/Tools/ardupilotwaf/boards.py
+++ b/Tools/ardupilotwaf/boards.py
@@ -481,6 +481,9 @@ class chibios(Board):
             '-fno-rtti',
             '-fno-threadsafe-statics',
         ]
+        env.CFLAGS += [
+            '-std=c11'
+        ]
 
         if Utils.unversioned_sys_platform() == 'cygwin':
             env.CXXFLAGS += ['-DCYGWIN_BUILD']