I'm running i686-w64-mingw32-gcc -Wno-implicit-fallthrough ... with gcc 6.3.0 on Linux, and I'm getting the message:
cc1: warning: unrecognized command line option ‘-Wno-implicit-fallthrough’
How can I suppress this message? I do want to specify -Wno-implicit-fallthrough though, it's useful when the code is compiled with newer versions of gcc. So I want -Wno-implicit-fallthrough to take effect if available; otherwise there should be no warnings like the above displayed.