On Fri, 15 Oct 2021 at 09:43, Iñaki Ucar <iucar@xxxxxxxxxxxxxxxxx> wrote: > > On Fri, 15 Oct 2021 at 06:15, Jeff Law <jeffreyalaw@xxxxxxxxx> wrote: > > > > > > > > On 10/13/2021 10:37 AM, Michael Catanzaro wrote: > > > On Wed, Oct 13 2021 at 06:06:50 PM +0200, Björn 'besser82' Esser > > > <besser82@xxxxxxxxxxxxxxxxx> wrote: > > >> What you describe as lto requires a lot of memory is caused by building > > >> lto along with non-lto in the same object file requires significantly > > >> more memory. For that reason one can disable building non-lto along > > >> with lto using the `-f-no-fat-lto-objects` compiler flags instead of > > >> `-f-fat-lto-objects`, if and *only IF* the package in question does > > >> *NOT* ship static libraries. > > > > > > More background: this default is, of course, backwards. Fedora > > > packages do not generally ship static libraries, so it makes more > > > sense for the few packages that do to opt-in instead of opt-out. Jeff > > > proposed a change to improve that here: > > > > > > https://fedoraproject.org/wiki/Changes/LTOBuildImprovements > > > > > > but he left Red Hat, so it hasn't been implemented. > > I'd still like to tackle this but my time is limited. > > > > However, I strongly suspect fat-lto-objects is not the problem here. If > > the build is running out of memory at link time, that is the LTO phase. > > The best solution for that is to either disable LTO on the arm target, > > or (better) limit the parallelism at link time. There was a change to > > redhat-rpm-config that I think made it into f35 to allow a package to > > throttle the link-time parallelism. > > This makes sense, because f34 builds consistently succeed in exactly > the same hardware. How do I limit just the link-time parallelism? Could this be related to this [1] commit? [1] https://src.fedoraproject.org/rpms/redhat-rpm-config/c/bc8fa85e907d4b2b88760da8d23c9e17663c44fa?branch=rawhide -- Iñaki Úcar _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
