Is it time to --enable-warnings?

[Hal Murray]

waf configure --help says:
      --enable-warnings   Enable annoying CC warnings

Are they really annoying?  My normal build script turns it on without 
problems.

What does gitlab do with warnings?  Should we be running with -Werror to 
turn warnings into errors so gitlab/CI will notice?  Any reason not to do 
that?

./wafhelpers/check_strerror.py says:
   # This uses -Werror which may not be portable.
Has anybody noticed any problems?


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