Re: [RFC] Update gmp/mpfr/mpc minimum versions

[Marc Glisse <marc dot glisse at inria dot fr>]

On Tue, 26 Apr 2016, Bernd Edlinger wrote:

> as we all know, it's high time now to adjust the minimum supported
> gmp/mpfr/mpc versions for gcc-7.
>
> So this attached patch is now targeting at only supporting the currently
> latest relased gmp-6.1.0, mpfr-3.1.4 and mpc-1.0.3, instead of trying
> to support all previous versions, especially in-tree, but also without the
> in-tree configuration the previously used versions are really creating
> trouble nowadays.

For in-tree builds, requiring the latest version makes sense to me. When 
building gcc with a pre-installed gmp/mpfr/mpc (say the one provided by 
your linux distribution), that's much more painful, and the benefit is not 
as clear. What "trouble" do you have in mind?

> To support gmp-6.1.0 in-tree we have to set AM_CFLAGS=-DNO_ASM
> as already done with mpfr.  This was already discussed recently on this list.

Note that gmp-6.1.1 is supposed to be out any day now and will not require 
-DNO_ASM anymore.

--
Marc Glisse