* Update LLVM to 18.1.2 and add wasm-component-ld
This commit has two intertwined changes within it. First the LLVM
submodule is updated to the 18.1.2 release branch. This alone would
cause CI and tests to fail due to differing behavior for the
`wasm32-wasip2` target. To fix these test failures the
`wasm-component-ld` tool is added to the build. This tool is a
Rust-written tool and installed via `cargo install` as part of the build
at a pinned version written in the `Makefile`. This linker, used for
components, is then used for the `wasm32-wasip2` target.
Tests and CI are then updated to skip the need to have `wasm-tools` or
the adapter for WASI when making components since that's now the job of
`wasm-component-ld`. This then necessitated some changes to tests too.
* Add back accidentally deleted CI
* Inherit tools on PATH on Windows
* Add Rust to docker build
* Put rust in a different location in docker
* Try to fix permissions
* Review comments
* Revert changes to test outputs
When running Git commands inside this Docker container (i.e., commands
that the `version.py` script needs for determining version information),
the Docker build would run into issues like:
```
fatal: detected dubious ownership in repository at '/workspace'
To add an exception for this directory, call:
git config --global --add safe.directory /workspace
```
This is due to an extra Git check that detects that the Docker user is
not the same one who owns the `.git` directory of this project. After
looking into this, the best solution the internet has to offer is to
thread the current user's UID and GID through the Docker image (i.e.,
the new `builder` user) and then `docker run --user ...`. This both
avoids the Git check but also seems to be considered a best practice in
some circles (?).
It appears newer LLVM releases need a newer version of Python, and
Xenial is quite old at this point, there being two LTS releases newer
it at this time.
Ubuntu is based on debian and debian a more stable base to build on
IMHO. This shouldn't effect much other than some minor changes in the
exact version clang we use to cross compile and the specific linked
host shared libraries.
Also, run `apt-get clean` to minimize image size (not that that really
matters since this is only used during SDK build).
Alex Crichton
Andrew Brown
Cheng Shao
Dan Gohman
Pat Hickey
Sam Clegg