On Tue, 2018-01-09 at 21:51 +0100, Jakub Jelinek wrote:
> On Tue, Jan 09, 2018 at 07:50:10PM +0000, Stephen Gallagher wrote:
> > > Well, true, but then just like every year, we'll wind up doing a lot of
> > > the spadework of fixing things to build with the new GCC. And probably
> > > at first some critical things will fail to build and that'll mess up
> > > the stability of the distro for a couple of weeks. I guess if everyone
> > > else is still loving that grind, hey.
> > > 
> > 
> > 
> > This is the cost of being "First". Fedora has long enjoyed a tight coupling
> > with the GCC upstream. It's a symbiosis: they use our mass-rebuild to help
> > identify any issues before GCC goes stable and in turn Fedora gets to have
> > the newest compiler features before anyone else.
> To be fair, Ubuntu (or Debian or both, dunno) has already performed test mass
> rebuilds with GCC 8 prerelease some time ago and OpenSUSE usually performs 
> them
> roughly at the same time as we do.  We are likely the first one or one of
> the first ones to deploy it as a stable compiler in the distro and it is
> mutually beneficial both for the distro and for GCC.

Just for the record, it is now 11pm the day before we are supposed to
branch Fedora 28, and I have spent the whole evening fixing
OpenColorIO's Python bindings to build with GCC 8:


only to find that it fails to build on i686 because since pdftex got
rebuilt with GCC 8 (OK, haven't confirmed that yet, but it's the most
obvious suspect), it's segfaulting:


Also noted by QuLogic trying to build R-htmltools:


So now I am running the build in an i686 mock so I can shell into the
mock and hopefully get a traceback of the pdftex crash and try to do
*something* about fixing it.

This is the kind of 'spadework' I was talking about. (And I haven't
even mentioned any of the *other* cases we've hit).
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net
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