Re: Debugging missing architecture support

[Konrad Hinsen <konrad.hinsen@fastmail.net>]

Ricardo Wurmus <rekado@elephly.net> writes:

> You can try this in guix repl:
>
> --8<---------------cut here---------------start------------->8---
> (import (srfi srfi-1)
>         (guix packages)
>         (gnu packages))
>
> (define p (specification->package "git-annex"))
> (define deps (package-development-inputs p))
> (find (lambda (pkg)
>         (not (member "aarch64-linux" (package-supported-systems pkg))))
>       (map cadr deps))
> --8<---------------cut here---------------end--------------->8---

Thanks, that's very useful!

I changed the last command to

--8<---------------cut here---------------start------------->8---
(find (lambda (pkg)
        (and (package? pkg)
             (not (member "aarch64-linux" (package-supported-systems pkg)))))
      (map cadr deps))
--8<---------------cut here---------------end--------------->8---

because some packages have local files among the development inputs.

This search doesn't work for all cases though. For "python-jupyterlab"
(from the guix-science channel) it returns no problematic dependencies,
and yet I cannot build the package for aarch64-linux.

The problem in that case seems to be cross-compilation. The dependency
of python-jupyterlab that fails to build is libwebp, whose build log
says:

   @ unsupported-platform /gnu/store/7fj9ckgxw27r196vkisc9cm3n8v9072x-libwebp-1.3.2.drv aarch64-linux
   while setting up the build environment: a `aarch64-linux' is required to
   build `/gnu/store/7fj9ckgxw27r196vkisc9cm3n8v9072x-libwebp-1.3.2.drv',
   but I am a `x86_64-linux'

Maybe this would build on an actual ARM64 machine.

Cheers,
  Konrad.