Require binutils 2.25 or later to build glibc

[Florian Weimer]

On 06/26/2017 02:46 PM, H.J. Lu wrote:
> Should we also allow gold 1.14 or above to build glibc?  After
> 
> commit 388b4f1a02f3a801965028bbfcd48d905638b797
> Author: H.J. Lu <hjl.tools@gmail.com>
> Date:   Fri Jun 23 14:38:46 2017 -0700
> 
>     Avoid .symver on common symbols [BZ #21666]
> 
>     The .symver directive on common symbol just creates a new common symbol,
>     not an alias and the newer assembler with the bug fix for
> 
> gold 1.14 can build glibc with  a few "make check" errors:
> 
> https://sourceware.org/bugzilla/show_bug.cgi?id=21674

Do you know if the tests are miscompiled, or if glibc itself is broken?

In case the latter, we should back out the change to accept gold if this
cannot be fixed before the release.

Thanks,
Florian