On Monday, June 4, 2018, 4:35:34 AM, Jan Kurik wrote: > = Proposed System Wide Change: i686 Is For x86-64 = > https://fedoraproject.org/wiki/Changes/i686_Is_For_x86-64 > Owner(s): > * Florian Weimer <fweimer at redhat dot com> > Fedora builds its i686 packages for use on x86-64 systems as multi-lib RPMs. > == Detailed description == > Currently, the i686 RPM packages are built in such a way that they are > compatible with very old i686 systems, such as the Pentium III. The > only addition over the i686/Pentium Pro baseline is a requirement to > support long NOPs, for Intel CET. However, the majority of > installations of i686 packages is for use on x86_64 systems, as > multi-lib RPMs. Furthermore, there are reports that the i686 kernel > does not run stable on old hardware which is not x86-64-capable ( > https://lists.fedoraproject.org/archives/list/x86@xxxxxxxxxxxxxxxxxxxxxxx/thread/ZHV6I4IEO7GRYAZ4TUMO5VH2ZHLCNJZQ/ > ). > This proposal suggests to accept this reality and build the i686 > packages in such a way that they require the ISA level of (early) > x86-64 CPUs. > == Scope == > * Proposal owners: > Adjust the redhat-rpm-config, gcc, and glibc packages to switch to the > new compiler flags. Except for mstackrealign, there is substantial > experience with this configuration downstream. > * Other developers: > Other developers can enable SSE2 optimization in their packages if > they want, where this has been a compile-time option only. > * Release engineering: > https://pagure.io/releng/issues/7543 #7543 > ** List of deliverables: TBD > * Policies and guidelines: > i686 is no longer a primary architecture. The Packaging Guidelines do > not currently require support for non-SSE2 x86 systems, so no change > is required there. I think this change is fundamentally wrong. If you have the 64-bit capable hardware, should not the focus be on the X84-64 modules? The 32-bit modules are targeted to an entirely different audience, who have already decided to take a performance hit by running in 32-bit mode. Requiring 64-bit hardware to run the 32-bit modules does not simply impact the i686 secondary architecture - it fundamentally breaks it. I don't see this change as being reasonable unless the i686 secondary arch is going to get a full parallel build to support i686 hardware. I don't see that happening either. Al _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx/message/X5MHFHEHQISB2YJBENM6JB3UUDPRJBSM/
