From fad504bc7f441d5fa87ba5e0e99c94d9a8494261 Mon Sep 17 00:00:00 2001
From: Harald Barth <haba@kth.se>
Date: Wed, 3 Aug 2022 09:31:03 +0200
Subject: [PATCH] extra catch for buggy compiler/preprocessor

---
 CommandStation-EX.ino | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CommandStation-EX.ino b/CommandStation-EX.ino
index 57a178b..0cbf056 100644
--- a/CommandStation-EX.ino
+++ b/CommandStation-EX.ino
@@ -18,6 +18,9 @@
 
 #if __has_include ( "config.h")
   #include "config.h"
+  #ifndef MOTOR_SHIELD_TYPE
+  #error Your config.h must include a MOTOR_SHIELD_TYPE definition. If you see this warning in spite not having a config.h, you have a buggy preprocessor and must copy config.example.h to config.h
+  #endif
 #else
   #warning config.h not found. Using defaults from config.example.h
   #include "config.example.h"