rustc_codegen_gcc: Progress Report #35 (blog.antoyo.xyz)

submitted 1 year ago by antoyo@programming.dev to c/rust@programming.dev

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I've been pretty busy in my life recently, but I finally got around writing this blog post. Hopefully, things are sorted out in my personal life and I should be able to be more regular about these updates in the future.

I'm very happy to see good progress towards rustup distribution (thanks to Kobzol again!).

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[-] antoyo@programming.dev 1 points 1 year ago

Thanks for reporting this! I cannot reproduce with the following:

y prepare
y build --release
y build
y clean all

(it shows: Successfully ran clean all)

Could you please provide the commands you ran to get this? (It might also be easier for me to track this if you open an issue on GitHub since I don't come here often.)

Also, thanks for the suggestion for better documentation: I created an issue for this.

[-] BB_C@programming.dev 1 points 1 year ago

Yeah, apologies for not communicating the issue clearly.

cp config.example.toml config.toml
./y.sh prepare
./y.sh build --sysroot
./y.sh clean all
# above commands finish with success
# below, building succeeds, but it later fails with "error: failed to load source for dependency `rustc-std-workspace-alloc`
./y.sh test --release

And then trying to use the "release" build fails:

% CHANNEL="release"  ./y.sh cargo build  --manifest-path tests/hello-world/Cargo.toml
[BUILD] build system
    Finished `release` profile [optimized] target(s) in 0.03s
Using `/tmp/rust/rustc_codegen_gcc/build/libgccjit/d6f5a708104a98199ac0f01a3b6b279a0f7c66d3` as path for libgccjit
   Compiling mylib v0.1.0 (/tmp/rust/rustc_codegen_gcc/tests/hello-world/mylib)
error[E0463]: can't find crate for `std`
  |
  = note: the `x86_64-unknown-linux-gnu` target may not be installed
  = help: consider downloading the target with `rustup target add x86_64-unknown-linux-gnu`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`

For more information about this error, try `rustc --explain E0463`.
error: could not compile `mylib` (lib) due to 1 previous error

I will make sure to report issues directly in the future, although from account(s) not connected to this username.

[-] antoyo@programming.dev 1 points 1 year ago

The issue here is that you didn't provide --build-sysroot to ./y.sh test --release, so it cannot find the std crate.

[-] BB_C@programming.dev 1 points 1 year ago

But running

./y.sh prepare
./y.sh test --release

does work. That's what gave me the impression that clean all doesn't actually clean everything!

[-] antoyo@programming.dev 2 points 1 year ago

It does actually clean everything. You need to call ./y.sh prepare again if you ran clean all; otherwise, it will fail to find some stuff like rustc-std-workspace-alloc.

I opened an issue to improve the documentation in this regards. Thanks for testing all this: this will help me improve the documentation.