gobject-introspection: fix cross-compilation

[ghost]

Currently pkgsCross.aarch64-multiplatform.gobject-introspection does
not build due to breakage in (a) generating the docs and (b)
generating the introspection data.

There really isn't proper support in gobject-introspection for
cross-compiles with -Dintrospection=true, just a collection of hacks
in meson_options.txt that are rumored to be useful somehow. I ave
not been able to find any reports of people actually getting this to
work.

Let's disable the docs nd introspection data for cross-compiles,
since a build without docs or introspection is still very useful, and
definitely more useful than no build at all.

Description of changes

Things done

• Built on platform(s)
  • x86_64-linux cross to aarch64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 22.05 Release Notes (or backporting 21.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

Currently pkgsCross.aarch64-multiplatform.gobject-introspection does
not build due to breakage in (a) generating the docs and (b)
generating the introspection data.

There really isn't proper support in gobject-introspection for
cross-compiles with -Dintrospection=true, just a collection of hacks
in meson_options.txt that are rumored to be useful somehow. I have
not been able to find any reports of people actually getting this to
work.

Let's disable the docs and introspection data for cross-compiles,
since a build without docs or introspection is still very useful, and
definitely more useful than no build at all.

[NickCao]

And, gobject-introspection is not really designed to be used in cross compilations, in short, even if it build, we can not build packages that depends on it. Then what's the point of fixing it in the first place?

[ghost]

even if it build, we can not build packages that depends on it.

We can. I am about to submit the patch that makes gtk3 cross-compile.

Stay tuned. It's worth it.

[NickCao]

even if it build, we can not build packages that depends on it.

We can. I am about to submit the patch that makes gtk3 cross-compile.

Stay tuned. It's worth it.

Some previous work on cross compiling gtk3 is at #148618, hope it helps.

[ghost]

We can. I am about to submit the patch that makes gtk3 cross-compile.

#166219

[ghost]

Some previous work on cross compiling gtk3 is at #148618, hope it helps.

Ah crap, I wish I had known about that before I spent a ton of time on #166219

[Artturin]

See #88222 for prior art

[Artturin]

#176464