[ccache] Support for color diagnostics

[Eitan Adler]

On Fri, Nov 29, 2013 at 6:39 AM, Lubos Lunak <l.lunak at centrum.cz> wrote:
> 100% reliable anyway), the code merely guesses from the binary name. If the
> compiler used will be e.g. the 'cc' symlink, there'll be no colors. No big
> deal.

Most users should be calling their compiler via the name 'cc' and not
'gcc' or 'clang'. IMHO this use case is the most important.

Why can't you ask the compiler via "cc --version" or the like?

-- 
Eitan Adler