bug#55657: libgccjit is unusable

[Liliana Marie Prikler <liliana.prikler@gmail.com>]

Am Donnerstag, dem 04.08.2022 um 04:48 +0000 schrieb Andrew Whatson:
> Hi John, Liliana,
> 
> Sorry I haven't jumped in before now, I appreciate your efforts to
> bring emacs native-comp to guix!
> 
> On Thu, 4 Aug 2022 at 04:26, Liliana Marie Prikler
> <liliana.prikler@gmail.com> wrote:
> > 
> > while this does help insofar as I now know which snippet I forgot
> > to
> > copy, I do still think that this leaves us with two unreasonable
> > options if we want to use emacs to compile other packages:
> > 
> > 1. Propagate gcc-toolchain from emacs.
> > 2. Patch LIBRARY_PATH not just before configuration, but also via a
> > wrapper.
> > 
> > At the very least I don't see how Emacs would be able to compile
> > other
> > packages to native code without either of the above.
> > 
> > WDYT?
> 
> The solution used in the package-definition in my channel is to patch
> `comp.el` to directly reference the necessary gcc/glibc paths instead
> of relying on the environment.  This occurs in the
> "patch-driver-options" step immediately after the "set-libgccjit-
> path" step mentioned earlier.  This makes gcc-toolchain part of emacs
> closure, without requiring it to be propagated into the profile.
> 
> If I understand the problem correctly, that should suffice?
But if I read your recipe correctly, you're not resolving %host-type in
those options.  Does that really suffice?