From c641563dda852880fb9f8189b83d02a59aabe17a Mon Sep 17 00:00:00 2001
From: Kitsune Ral <Kitsune-Ral@users.sf.net>
Date: Sat, 16 Dec 2017 19:34:54 +0900
Subject: CMakeLists.txt: Make -Wreturn-type an error

Because a missing return in a non-void function is always an error.
---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1cf871a3..e33c4e0e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,6 +28,10 @@ CHECK_CXX_COMPILER_FLAG("-Wpedantic" PEDANTIC_FLAG_SUPPORTED)
 if ( PEDANTIC_FLAG_SUPPORTED AND NOT CMAKE_CXX_FLAGS MATCHES "(^| )pedantic($| )")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wpedantic")
 endif ( )
+CHECK_CXX_COMPILER_FLAG("-Werror=return-type" WERROR_FLAG_SUPPORTED)
+if ( WERROR_FLAG_SUPPORTED )
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror=return-type")
+endif ( )
 
 if ( CMAKE_VERSION VERSION_LESS "3.1" )
     CHECK_CXX_COMPILER_FLAG("-std=c++11" STD_FLAG_SUPPORTED)
-- 
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