diff --git a/CMakeLists.txt b/CMakeLists.txt
index cb17272..8bcba7a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,11 +89,11 @@ message("Cannot locate config.h for fontforge")
 endif()
 
 
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wunused-function")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2")
 #set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ggdb")
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wunused-function")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
 # clang compiler need c++11 flag
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
diff --git a/TODO b/TODO
index 32dd61f..8e9426d 100644
--- a/TODO
+++ b/TODO
@@ -1,6 +1,6 @@
 rename single-html -> embed-font/image/css ...
 
-bug found in baidu & mail
+bug found in baidu & mail & FCM
 
 option for tounicode-map
 get unicode from charname using fontforge (test with 'Font' croc.pdf)