From 2f52a5d34fad81509fbc99379d37b60a19ac5cf9 Mon Sep 17 00:00:00 2001
From: Ronald Kinard <furyhunter600@gmail.com>
Date: Sun, 8 Mar 2015 18:47:26 -0500
Subject: [PATCH] Added a fatal error message when attempting an in-source
 build.

In-source builds are pain and suffering and I am going to stop people
from doing them to save them that pain.
---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 346fd8db0..e23d891cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,10 @@ project(SRB2
 	VERSION 2.1.14
 	LANGUAGES C)
 
+if(${PROJECT_SOURCE_DIR} MATCHES ${PROJECT_BINARY_DIR})
+	message(FATAL_ERROR "In-source builds will bring you a world of pain. Please make a separate directory to invoke CMake from.")
+endif()
+
 # Set up CMAKE path
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")