From 0a1fad5c0c4b478f3edb1c76849de86afb677546 Mon Sep 17 00:00:00 2001
From: "Dirk O. Kaar" <dok@dok-net.net>
Date: Sun, 20 Jun 2021 18:07:16 +0200
Subject: [PATCH] Make non-void functions without return an error.

---
 platform.txt | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/platform.txt b/platform.txt
index 3630b270f92..620b608471e 100644
--- a/platform.txt
+++ b/platform.txt
@@ -84,9 +84,9 @@ compiler.ar.cmd={compiler.prefix}ar
 compiler.size.cmd={compiler.prefix}size
 
 # Arduino Compile Warning Levels
-compiler.warning_flags=-w
-compiler.warning_flags.none=-w
-compiler.warning_flags.default=
+compiler.warning_flags=-w -Werror=return-type
+compiler.warning_flags.none=-w -Werror=return-type
+compiler.warning_flags.default=-Werror=return-type
 compiler.warning_flags.more=-Wall -Werror=all
 compiler.warning_flags.all=-Wall -Werror=all -Wextra