Warn for unknown warning options

Author: zhihaoy

CMakeLists.txt

@@ -52,7 +52,6 @@ if("${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "MSVC")
 else()
     add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Wextra>)
 endif()
-add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Wno-unknown-warning-option>)
 add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Wno-unused-parameter>)
 add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-Wno-unused-value>)
 add_compile_options($<$<COMPILE_LANG_AND_ID:C,AppleClang,Clang>:-Wno-unused-function>)