Unfortunately, even building Firefox with GCC fails:
> 3:30.02 [gecko-profiler 0.1.0] /../lib/gcc/aarch64-unknown-linux-gnu/14/include/g++-v14/cstdlib:79:15: fatal error: 'stdlib.h' file not found
> 3:30.02 [gecko-profiler 0.1.0] thread 'main' panicked at tools/profiler/rust-api/build.rs:104:10:
> 3:30.02 [gecko-profiler 0.1.0] Unable to generate bindings: ClangDiagnostic("/../lib/gcc/aarch64-unknown-linux-gnu/14/include/g++-v14/cstdlib:79:15: fatal error: 'stdlib.h' file not found\n")
Clearly, something is misconfigured, because `stdlib.h` does indeed
exist. I am not sure what, though, and I am getting tired of messing
with this.
Fortunately, the official Gentoo binary package project has a build of
_www-client/firefox_ for ARM64. It has a rather different USE flag
configuration than what we did, though, so we have to pull in quite a
few more dependencies.
We can't just add _www-client/firefox_ to `install.packages` because
Aimee OS runs `emerge` with `--getbinpkgonly`, which implies
`--binpkg-changed-deps=y`. This since we want to build everything
_except_ Firefox locally, the dependency graph is quite a bit different,
so Portage ignores the binary package and will try to build
_www-client/firefox_ from source.
To work around this limitation, we need to install Firefox manually in
the `customize.sh` script in two phases. First, we install all of its
dependencies in the build root (`/usr/aarch64-…`), but not Firefox
itself, to get binpkgs for them. Then, we install _www-client/firefox_
in the target root (`/mnt/gentoo`) with the `--getbinpkg` and
`--usepkgonly` flags.
Hopefully, one day I can figure out how to cross-compile Firefox (and it
doesn't take days to build once I do), and we can remove this hackery.
Building _www-client/firefox_ fails fairly early with an error about not
being able to find `aarch64-unknown-linux-gnu-clang-19` to use as `CC`.
I have not been able to determine what is supposed to provide this
program/symlink, nor much information at all about cross-compiling with
Clang, really. We shall try building Firefox with GCC, since we know
that toolchain is complete.
Attempting to cross-compile Firefox will be rather challenging. It has
loads of dependencies, written in a variety of languages. Some issues
are more interesting than others. Notably, _dev-libs/nss_ needs to be
installed on the host in order to cross-compile itself, but its ebuild
does not specify this ([Bug 759127][0]). Also the build system for
_gnome-base/librsvg_ is broken: [Gentoo Bug 835758][1], [GNOME
Issue #810][2]. Cross-compiling _dev-libs/gobject-introspection_ is
also broken ([Bug 759127][3], [850895][4]).
With all of these changes, we can get to the point where Portage starts
building Firefox, it will take hours and all of my machine's resources,
so I haven't tested if will actually build. We shall see once Jenkins
tries it...
[0]: https://bugs.gentoo.org/759127
[1]: https://bugs.gentoo.org/835758
[2]: https://gitlab.gnome.org/GNOME/librsvg/-/issues/810
[3]: https://bugs.gentoo.org/850895
[4]: https://bugs.gentoo.org/751325
Dustin