New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/pull/34995#issuecomment-1010126600

Comment:
> Don't we need to `cd pkg` and `../bin/BuildPackages.sh` at some point?
> 
> I thought their make install does not work:
> 
> ```
> => gap-4.11.1_1: running do_install ...
> Warning, 'make install-bin' is incomplete
> # TODO: make gac installable; this requires adjusting path in it, and
> # installing the libtool script generated by configure somewhere; and then
> # putting that path to it into gac)
> Warning, 'make install-gaproot' is incomplete
> # TODO: update paths and FLAGS in sysinfo.gap
> # the following lines should not use `cp -r`, which is not quite portable,
> # and which also may not deal with file permissions correctly
> # TODO: what about CITATION, CONTRIBUTING.md, COPYRIGHT, INSTALL.md,
> # LICENSE, README* ? Copy them also here? Or into some other path?
> # TODO: also copy bin/BuildPackage.sh, as it is very useful?
> Warning, 'make install-headers' is incomplete
> # TODO: run the following only if HPC-GAP is enabled?
> # TODO: take care of config.h, this is difficult
> Warning, 'make install-libgap' is incomplete
> libtool: warning: remember to run 'libtool --finish /usr/lib64'
> ```

It's incomplete, but it seems to work. The shortcoming is that it
doesn't install packages or gac. I'm hand installing the same packages
as sage:
 - the minimal required packages (without them gap errors at start)
 - all the recommended packages (without them gap warns at start)

I don't know yet if gac is needed for sage (sage installs it so it may
be useful, also gap is already large b/c of the transitive group
database so adding gac is probably negligible in size).

WRT `BuildPackages.sh` that's for some packages that need building,
which as far as I can tell the ones I picked don't need it.

> +configure_args="--with-gmp=system"

I think it's picked automatically if `gmp-devel` is installed.

> +hostmakedepends="tar"

Maybe needed for building some package we don't install (?)

> +makedepends="givaro-devel mpfi-devel cddlib-devel libXaw-devel
> + boost-devel zeromq-devel fplll-devel wget chrpath fmt-devel libcurl-devel ncurses-devel"

These are for some packages we don't install. Except ncurses-devel which
is needed for and implied by `readline-devel`.

> Just a stupid lint: could you rebase on master and move up `make_install_target` by two?

Done, and everything is now working on CI.

I'll remove the `[WIP]` from the title when we have sagemath running and
passing all tests in all arches using system gap.