Re: guix package -i kicad will fait with #error "Unsupported CPU architecture" on my Talos II

[Tobias Alexandra Platen <guix@platen-software.de>]

On Sat, 2024-11-30 at 20:59 +0000, Ian Eure wrote:
> Hi Tobias,
> 
> On Sat, Nov 30, 2024, at 8:18 PM, Tobias Alexandra Platen wrote:
> > When I try to install Kicad, I'll get the following output:
> > 
> > The following derivations will be built:
> >   /gnu/store/5rinv8djwjz0bdami6nr6cm3zj382fsb-libcxi-1.0.1-
> > 0.5b6f8b5.drv
> >   /gnu/store/x26zsx3fw74vhfc35i79fansmlmhl0cc-libfabric-1.22.0.drv
> >   /gnu/store/nfj2qvhyxvfc7x5fkdlyg2z1wnpqw9cz-openmpi-4.1.6.drv
> >   /gnu/store/l1rbmwj9m4kgkm1qada665mm0m6g10w1-libngspice-43.drv
> >   /gnu/store/y88c48hzcm78ch39wjfa3dpdgw9n6m7r-webkitgtk-with-
> > libsoup2-
> > 2.44.1.drv
> >   /gnu/store/qv0zpz8h2dvhbmxz6smsbmc763rdkdxm-wxwidgets-3.2.5.drv
> >   /gnu/store/llydl3baxardzgf9xmdbgjikny68vaar-python-wxpython-
> > 4.2.0.drv
> >   /gnu/store/b0s2jgimknw6035kcqvpb6sdxkhakz7b-kicad-7.0.11.drv
> >  
> > After a few minutes the build fails with:
> > 
> > building /gnu/store/5rinv8djwjz0bdami6nr6cm3zj382fsb-libcxi-1.0.1-
> > 0.5b6f8b5.drv...
> > \ 'build' phasebuilder for
> > `/gnu/store/5rinv8djwjz0bdami6nr6cm3zj382fsb-libcxi-1.0.1-
> > 0.5b6f8b5.drv' failed with exit code 1
> > build of /gnu/store/5rinv8djwjz0bdami6nr6cm3zj382fsb-libcxi-1.0.1-
> > 0.5b6f8b5.drv failed
> > View build log at
> > '/var/log/guix/drvs/5r/inv8djwjz0bdami6nr6cm3zj382fsb-libcxi-1.0.1-
> > 0.5b6f8b5.drv.gz'.
> > ........
> > CC       utils/read_lat.o
> > ........
> > #error "Unsupported CPU architecture"
> > 
> > I also found a blogpost which mentions libcxi, what does libcxi do?
> > https://hpc.guix.info/blog/2024/11/targeting-the-crayhpe-slingshot-interconnect/
> > 
> 
> The package description provides a pretty good summary:
> 
>         Interface to the Cassini/Slingshot high-speed interconnect
> 
>         Libcxi provides applications with a low-level interface to
> the
>         Cray/HPE Cassini high-speed NIC (network interface
> controller), also
>         known as Slingshot.
> 
> > I guess that libcxi is optional for Kicad, so I could hack guix to
> > build Kicad without libcxi.
Since I do not have that interconnect I would make it optional.
The fastest interconnect that I have is USB 3.0 between my Talos II
(host) and ROCKPro64 (device/otg). I plan to make my own guix channel
anyway with personal changes and for software development. For example
I plan to add guile scripting to eeschema, after I found out that the
python scripts are broken and upgrade to KiCad 8 or any later version.
> > 
> 
> I think this is worth a bug report, and maybe you're also up to
> sending some patches?  I think it's slightly more complicated than
> just the kicad package, though, since libcxi isn't a direct
> dependency:
> 
>         $ guix graph --path kicad libcxi
>         kicad@7.0.11
>         libngspice@43
>         openmpi@4.1.6
>         libfabric@1.22.0
>         libcxi@1.0.1-0.5b6f8b5
> 
> So, I think what needs to happen is that libcxi needs to have POWER9
> removed from its supported-systems field; and libfabric needs to
> conditionally include libcxi in its inputs based on architecture.  I
> think the best way to do that is by checking for the build system in
> (package-supported-systems libcxi), which will avoid hardcoding
> duplicate arch tests in two packages.
> 
>   -- Ian
>