On Sun, Apr 13, 2025, 13:18 Andreas K. Huettel <dilfri...@gentoo.org> wrote:
> Draft to be published ASAP, feedback welcome... > > > > Title: Gentoo raises s390x baseline to z10 > Author: Andreas K. Hüttel <dilfri...@gentoo.org> > Posted: xxxx-xx-xx > Revision: x > News-Item-Format: 2.0 > Display-If-Profile: default/linux/s390/17.0/s390x > Display-If-Profile: default/linux/s390/17.0/s390x/systemd/merged-usr > Display-If-Profile: default/linux/s390/23.0/split-usr/s390x > Display-If-Profile: default/linux/s390/23.0/s390x > Display-If-Profile: default/linux/s390/23.0/s390x/systemd > > Since more and more software for s390x assumes the presence of a more > recent processor, we will raise in 64bit s390x profiles the ISA baseline > for the catalyst stage builds and the published binary packages from > z900 to z10 (i.e., -march=z10). > This wording is a little awkward. I suggest "[...] we will raise the ISA baseline in 64bit s390x profiles for the catalyst stage builds [...]" > * If you are running an installation and emerge locally from source, > this does not affect you. > > * If you are running an installation and use our binary packages, > please make sure you have compatibility for z10 or switch to building > from source. > > * The 64bit s390x stages will only work with machines compatible with > z10. > > * This does not affect the 31bit s390 stages or packages. > > The z10 Enterprise Class (2097 series) was introduced in February 2008 [1], > which essentially means everyone except hardware archaeologists should be > fine. > > Note that z10 is still a very conservative setting; on modern machines > a newer ISA is strongly recommended. > > [1] https://en.wikipedia.org/wiki/IBM_Z > > -- > Andreas K. Hüttel > dilfri...@gentoo.org > Gentoo Linux developer > (council, toolchain, base-system, perl, libreoffice) -dwfreed
