We are being pulled over in two different directions when it comes to
our reproducible builds. On the one hand we need to target reasonably
old glibc versions in order to be compatible with older systems. On the
other hand the immaturity of the Rust ecosystem makes us require
bleeding edge versions of the compiler. With Guix to get the newer
versions of the compiler we need to also bump the glibc version.
This was not a sustainable situation. I was planning for a long time to
cleanup our reproducible builds. To create a proper Guix package for
both the daemon and the GUI using the build system they provide. I had
envisioned this way i could rewrite the inputs of the Guix package to
use an older glibc, while being able to bump the Guix time-machine. It
would even have allowed us to perform Windows builds inside Guix! And
who knows i could even have attempted to perform Apple ones too.
Unfortunately it turned out to be more complicated than that. I couldn't
manage to get my package to compile using an older glibc. Some details
about some of my failed attempts can be found there:
https://lists.gnu.org/archive/html/help-guix/2024-04/msg00056.html.
Instead of wasting more time on this, backport the newer Rust
declarations from up-to-date Guix to Guix-of-our-time-machine.
860a1ea074