-Werror causes compiler to stop on #warning. What can I do to prevent this?

First off, I want it to stop on warnings. But I also want to print out some informative messages (like "Come back and implement this!").

Unfortunately, my compiler doesn't support #info, #message, #pragma message(), etc.

I know there's -Wno-error=, but my google-foo is weak, and I can't seem to find out the for #warning. I've tried -Wno-error=warning, and that just says "there's no -Wwarning". Same with "warn".

Any suggestions?

For what its worth, I'm using the Tensilica xtensa compiler, xt-xcc, which appears to be a gnu derivative, or at least uses the gnu front end. It's version 8.0.0.