Re: [PATCH] GDB testsuite: Suppress GCC's colored output

[Yao Qi <qiyaoltc@gmail.com>]

Simon Marchi <simon.marchi@polymtl.ca> writes:

> My gcc (5.4) doesn't recognize it:
>
> $ gcc -fno-color-diagnostics test.c
> gcc: error: unrecognized command line option ‘-fno-color-diagnostics’
>

Ah, sorry.  What I meant is -fdiagnostics-color=never.

> It knows about -fdiagnostics-color=never however, which clang seems to
> recognize as well.  It would be nice however not to restrict the
> compiler version used for testing just for this.  Can we write a small
> proc that checks if the compiler recognizes that flag and only include
> it if it does?

Yes, we can do that, but be careful on the recursive calls here.  We
want to pass -fdiagnostics-color=never to compiler during compilation,
but we need to check whether compiler understands this option or not.
When we test compiler, we may pass -fdiagnostics-color=never to compiler
to try to compile something again to see if compiler understands.

-- 
Yao (齐尧)