New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/pull/34030#issuecomment-1016679758

Comment:
Rebased to master and squashed.

 - sphinx update is NOT needed now
 - all dependenciees are already available on void repo
 - this version has no vendored packages, only the sagelib + binary scripts is shipped in the xbps, which is 230M.
 - all doctests pass for me locally (including musl 1.2)

I kept the full commit history at https://github.com/tornaria/void-packages/tree/sagemath-v1.

I've only tested the CLI. I'm sure the notebook/jupyter interface will need fixing. 

At this point it's probably convenient to switch the installation method so that the sagelib to the main site-packages. Also the `src` directory is probably not needed other than for doctesting, and in principle everything is already copied into `site-packages` so (a) introspection (display source for a function from inside sage) should work (b) it should be possible to configure something so that it can be doctested from `site-packages`.