From 2f9489fbf4b6c4fa9814fb4e402293dbb957f869 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Sat, 23 Apr 2016 13:21:11 +0200
Subject: cmake: explicitly disallow source directory being equal to build
 directory

Causes frequent user confusion on Linux.
---
 CMakeLists.txt                              | 1 +
 cmake/opentrack-check-build-directory.cmake | 7 +++++++
 2 files changed, 8 insertions(+)
 mode change 100644 => 100755 CMakeLists.txt
 create mode 100755 cmake/opentrack-check-build-directory.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
old mode 100644
new mode 100755
index fef1baed..1d8d5aef
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,7 @@ cmake_minimum_required(VERSION 2.8.11)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake/)
 include(CMakeParseArguments)
+include(opentrack-check-build-directory)
 include(opentrack-policy)
 include(opentrack-qt)
 include(opentrack-platform)
diff --git a/cmake/opentrack-check-build-directory.cmake b/cmake/opentrack-check-build-directory.cmake
new file mode 100755
index 00000000..a9351b6a
--- /dev/null
+++ b/cmake/opentrack-check-build-directory.cmake
@@ -0,0 +1,7 @@
+get_filename_component(_abs_src_path ${CMAKE_SOURCE_DIR} REALPATH)
+string(TOLOWER ${_abs_src_path} _abs_src_path)
+get_filename_component(_abs_build_path ${CMAKE_BINARY_DIR} REALPATH)
+string(TOLOWER ${_abs_build_path} _abs_build_path)
+if(_abs_src_path STREQUAL _abs_build_path)
+    message(FATAL_ERROR "source directory has to be different than build directory")
+endif()
-- 
cgit v1.2.3