From a925a4cab1b722a2a24b0c1d2a1925f3b766de61 Mon Sep 17 00:00:00 2001
From: "Yann E. MORIN" <yann.morin.1998@free.fr>
Date: Thu, 2 Mar 2017 21:43:39 +0100
Subject: [PATCH] CMakeList: do not overwrite module path

Currently, the CMakeList.txt completely overwrites the CMAKE_MODULE_PATH
variable.

This is problematic when an upper-layer buildsystem wants to set its own
module path to use custom modules.

For example, Buldroot [0] provides a custom platform description [1] to fix
cross-compilation issue. Overwriting the module path means that this
custom platform description is not found [2].

Providing such a custom platform description is what the upstream cmake
devs suggest [3], quoting:

    If a toolchain file specifies CMAKE_SYSTEM_NAME such that a custom
    `Platform/MySystem.cmake` file is loaded then the latter can set
    them [*] as needed for the target platform.

[*] offending settings causing RPATH issues during cross-compilation.

So we need to append our source tree to the module path, not replace it
blindly.

[0] https://buildroot.org/
[1] https://git.buildroot.org/buildroot/tree/support/misc/Buildroot.cmake
[2] http://autobuild.buildroot.net/results/69f/69fb2e3b549a069e2898506db918423e6742c589/build-end.log
[3] http://public.kitware.com/pipermail/cmake/2017-February/065063.html

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
---
Patch applied upstream:
https://git.universe-factory.net/fastd/commit/?id=a925a4cab1b722a2a24b0c1d2a1925f3b766de61

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 61689b1..2c9c61a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 2.8.8)
 
-set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 cmake_policy(SET CMP0017 OLD) # Prefer modules in our module directory
 
 project(FASTD C ASM)
-- 
2.7.4