On Fri, Jan 14, 2022 at 7:32 AM Jakub Jelinek <jakub@xxxxxxxxxx> wrote: > Another important thing I wanted to say is that we'd like to switch > ppc64le from the numerically problematic IBM extended long double to > IEEE 754 quad long double. This is an ABI change. Some libraries > are already built so that they support both ABIs at the same time, > including glibc, libstdc++, libgcc, libgfortran etc. > For other libraries and binaries, the compiler, assembler and linker > will notice if they use long double and flag them as using either > IBM or IEEE long double and linker (or I think dynamic linker too) > might complain when things are mixed. > Right now the rawhide gcc still defaults to -mabi=ibmlongdouble > but the glibc/gcc libraries are built compatibly with both. > We'd like to configure gcc shortly before the mass rebuild with > --with-long-double-format=ieee so that it will default to > -mabi=ieeelongdouble, probably on a side-tag build first, and it > will be highly desirable to rebuild at least some of the most commonly > used library packages in the order of dependencies there, otherwise > I'd be afraid the mass rebuild could fail for way too many packages > (as the mass rebuild doesn't do dependency order rebuilds but just > goes through packages alphabetically or so). I don't know if this change is involved, but I've got several packages that failed to build on ppc64le only, with what look like gcc segfaults: - cli11: https://koji.fedoraproject.org/koji/taskinfo?taskID=81476792 - dra2ter: https://koji.fedoraproject.org/koji/taskinfo?taskID=81482527 - libfplll: https://koji.fedoraproject.org/koji/taskinfo?taskID=81533813 - libpoly: https://koji.fedoraproject.org/koji/taskinfo?taskID=81536797 - mp: https://koji.fedoraproject.org/koji/taskinfo?taskID=81548297 - python-fpylll: https://koji.fedoraproject.org/koji/taskinfo?taskID=81597035 Also note that libmpc failed to build on ppc64le only: https://koji.fedoraproject.org/koji/taskinfo?taskID=81535783 Since gcc uses libmpc, it's probably important to look at that one carefully. -- Jerry James http://www.jamezone.org/ _______________________________________________ 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
