diff -up Clementine-fb00835468295925a6945a286406a2eec6bdb67a/gst/moodbar/CMakeLists.txt.moodbar Clementine-fb00835468295925a6945a286406a2eec6bdb67a/gst/moodbar/CMakeLists.txt
--- Clementine-fb00835468295925a6945a286406a2eec6bdb67a/gst/moodbar/CMakeLists.txt.moodbar	2018-10-05 11:56:49.000000000 +0200
+++ Clementine-fb00835468295925a6945a286406a2eec6bdb67a/gst/moodbar/CMakeLists.txt	2018-10-21 00:36:54.065089023 +0200
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 2.8.11)
 
-set(CMAKE_C_FLAGS "-Wall")
-set(CMAKE_CXX_FLAGS "-Woverloaded-virtual -Wall --std=c++0x")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Woverloaded-virtual -Wall --std=c++0x")
 
 include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})