--- a/src/CMakeLists.txt	2016-09-14 01:48:05.822928918 +0200
+++ b/src/CMakeLists.txt	2016-09-14 01:48:54.906931451 +0200
@@ -3,7 +3,7 @@ ADD_COMPILE_OPTIONS(-std=c++11)
 IF (WIN32)
     ADD_DEFINITIONS(-D_CRT_SECURE_NO_WARNINGS)
 ELSE (WIN32)
-    SET(CMAKE_CXX_FLAGS "-Wall -fno-strict-aliasing")
+    SET(CMAKE_CXX_FLAGS "-Wall -fno-strict-aliasing ${CMAKE_CXX_FLAGS}")
 
     OPTION(APVLV_ENABLE_DEBUG "If build binary with debug information." OFF)
     IF (APVLV_ENABLE_DEBUG)
