Patch: automatic dependencies for gcc

[Tom Tromey]

>>>>> "Paolo" == Paolo Bonzini <bonzini@gnu.org> writes:

Paolo> Ok after testing on a cross and canadian, with one change if you wish:

A cross revealed a typo in that patch, whoops.  There is a "%(" at the
end which should be "$(".

My attempt at a canadian cross was too frustrating, and I have other
things to do right now.  I'll try to revisit this patch sometime.
I'll resubmit it after that.

>> XGCC_GEN_HEADERS

Paolo> why not call it $(generated_files) instead?

I'll rename this whenever I get back to it.

thanks,
Tom