vte: enable compiling with musl

[cdepillabout]

This enables VTE to be compiled with pkgsMusl.

VTE requires a small patch to be compiled with musl.

This has been upstreamed, but there appears to be some resistance to support enabling builds with musl:
https://gitlab.gnome.org/GNOME/vte/issues/72

Motivation for this change

This is for nh2/static-haskell-nix#50. I'd like to get VTE compiling with musl, and eventually compiling statically.

You can test this like the following:

$ nix-build -A pkgsMusl.vte
...
/nix/store/4bbyrrnbildrs9807jcwpl544m0jc26h-vte-0.58.2

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

Notify maintainers

cc @nh2 @domenkozar @matthewbauer @astsmtl @antono @lethalman

[cdepillabout]

Note that there are currently 4 commits in this PR, but three of them are just from #71575: b1b809f, 4845af0, and 317cd4d.

This PR should only be merged after #71575, and should be rebased on master after #71575 is merged.

[cdepillabout]

This is related to the following three PRs:

• dbus: enable building with musl dbus: enable building with musl #71560
• libusb1: enable compiling with musl libusb1: enable compiling with musl #71563
• cups: enable compiling with musl cups: enable compiling with musl #71575

[cdepillabout]

@GrahamcOfBorg build vte

@GrahamcOfBorg build pkgsMusl.vte

[cdepillabout]

Before merging in, this PR should be changed so that vte takes enableSystemd as an argument as recommended by @nh2 in #71575 (comment).

[nh2]

Before merging in, this PR should be changed so that vte takes enableSystemd as an argument as recommended by @nh2 in #71575 (comment).

For this one it isn't necessary, because vte itself needs a musl-specific patch and doesn't depend on systemd.

[cdepillabout]

@nh2 Good catch.

This PR just depends on these other three PRs, which need to be merged in before this can be rebased on master and merged in:

#71577 (comment)

[nh2]

Rebased on master

[cdepillabout]

Note that this PR still needs #71575 merged into master before it makes sense to merge this PR in.

[nh2]

Note that this PR still needs #71575 merged into master before it makes sense to merge this PR in.

Merged that one.

This one has worked fine for me in static-haskell-nix so far, and no changes for non-musl; merging this one too.