Re: ppc64el: IEEE 128-bit long double instead of IBM 128-bit long double

[Matthias Klose <doko@debian.org>]

On 9/4/25 14:52, Adrian Bunk wrote:
> On Thu, Sep 04, 2025 at 11:42:54AM +0200, Matthias Klose wrote:
> > On 8/5/25 13:29, Matthias Klose wrote:
> > > For the opening of trixie, both GCC and LLVM are prepared to change the
> > > long double ABI from  IBM 128-bit long double to  IEEE 128-bit long
> > > double.  That is a change that other distros did long ago.
> > >
> > > For reference, please see
> > > https://developers.redhat.com/articles/2023/05/16/benefits-fedora-38-
> > > long-double-transition-ppc64le#
> > >
> > > I'm proposing to do this "transition" inline, doing just no-change
> > > binNMUs in most cases.  long double in the ABI is not that common.
> > > Afaiu, Fedora and OpenSUSE did it this way, and also Ubuntu is doing it
> > > currently this way.  Ubuntu also has a (maybe incomplete) list of
> > > packages, which require binNMUs.
> >
> > with GCC 15 now as the default, we are starting with the sourceful no-change
> > uploads, as suggested by Graham.  Progress is tracked in
> >
> > https://wiki.debian.org/ToolChain/IEEELongDouble
>
> Is gcc-14 with the changed ABI equivalent?
>
> I am asking since the uploads you did so far did build with gcc-14.

yes, it's configured for all gcc-N versions, needed to do that for the 
libgphobos bootstrap anyway.