diff -uNrbB ibus-chewing-1.3.10-Source.bak/CMakeLists.txt ibus-chewing-1.3.10-Source/CMakeLists.txt
--- ibus-chewing-1.3.10-Source.bak/CMakeLists.txt	2011-10-12 19:50:51.371121417 +0800
+++ ibus-chewing-1.3.10-Source/CMakeLists.txt	2011-10-24 09:24:06.189668872 +0800
@@ -20,7 +20,7 @@
 
 Chewing also support toned Hanyu pinyin input.")
 
-SET(CMAKE_C_FLAGS "-Wall")
+SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
 
 SET(AUTHORS "Peng Huang, Ding-Yi Chen")
 SET(MAINTAINER "Ding-Yi Chen <dchen at redhat.com>")