Re: FYI: s390x: Require GCC 7.1 or later to build glibc due to __builtin_add_overflow

[Paul Eggert]

On 12/18/20 4:14 AM, Bruno Haible wrote:
> Thanks for the heads-up. Indeed, what I understand from this bug report is that
> the condition code handling (required by __builtin_add_overflow on many
> platforms) was unreliable before 2017-01-27, i.e. in GCC versions < 7.
> So, gnulib shouldn't make use of it in these GCC versions.

So the problem is on all platforms, not just s390x? If so, shouldn't GCC 7 
be required for building glibc on all platforms, not just s390x?

Even if we propagate the updated Gnulib intprops.h to glibc, glibc uses 
__builtin_add_overflow in several other places.