Re: enabling link time optimizations in package builds
Adrian Bunk:
> On Fri, Jun 17, 2022 at 10:18:43AM +0200, Matthias Klose wrote:
...
>
> >...
> > Link time
> > optimizations are also at least turned on in other distros like Fedora,
> > OpenSuse (two years) and Ubuntu (one year).
> >...
> > The idea is to file wishlist bug reports for those 373 packages and then see
> > how far we get, and if it's feasible to already turn on LTO for bookworm.
> > If not, it should be turned on by default for the following release.
>
> I assume these 373 packages have already been fixed/workarounded in Ubuntu?
> Submitting 373 bugs with patches should settle the feasibility question.
>
For my software (bart), it triggers a compiler bug where the
compiler crashes.
Martin
> A bigger worry is the schedule of such a change.
> A major toolchain change shortly before the freeze means the vast
> majority of packages will be shipped with non-LTO builds in the release,
> with security updates or point release updates triggering a change to
> an LTO built package.
> This means few packages actually benefitting from LTO, but a higher
> regression risk when fixing bugs in stable.
> The best timing for such a change would be immediately after the release
> of bookworm.
>
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