There's a merged pull request on the void-packages repository

python3: force sem_gevalue for all cross arches
https://github.com/void-linux/void-packages/pull/43902

Description:
- I tested the changes in this PR: yes
- I built this PR locally for my native architecture, (aarch64)

As discussed in https://github.com/void-linux/void-packages/pull/43659 this is checked by compiling and running a program that won't work in cross, but we know `sem_gevalue` is ok at least on `aarch64` (to be more conservative, I could also only enable it there, rather than all arches).

cc @ahesford