Colored output

[Akim Demaille]

Hi friends,

I'd like to have colored diagnostics in Bison, I do feel on occasion it would 
make it easier to spot errors and warnings for instance.

AFAICT, gnulib does not feature any module to help do this.  Coreutils (ls) and 
GCC (maybe diffutils too) are probably good sources of inspiration, but am I 
missing something?  Should I look elsewhere first?  Would a gnulib module make 
sense?

Thanks in advance.