[PATCH] move the computation of C++ warning flags to bfd/warning.m4

[Alan Modra]

On Sun, Apr 03, 2016 at 01:22:07PM -0400, tbsaunde+binutils@tbsaunde.org wrote:
> There isn't anything specific to gold about this code, so it would seem to make
> sense to compute C and C++ warning flags in the same place.  This also means
> that anything else that wants C++ warning flags won't have to roll there own.

I think I prefer things the way they are, but in any case will defer
to Cary's opinion on whether this patch should be accepted.

-- 
Alan Modra
Australia Development Lab, IBM