Distribute cg_clif as rustup component on the nightly channel #81746

bjorn3 · 2021-02-04T10:26:21Z

This makes it possible to use cg_clif using:

$ rustup component add rustc-codegen-cranelift-preview --toolchain nightly
$ RUSTFLAGS="-Zcodegen-backend=cranelift" cargo +nightly build

cc rust-lang/compiler-team#405.
r? @Mark-Simulacrum

bjorn3 · 2021-02-08T08:33:11Z

./x.py build seems to build another rustc stage now. Why does that happen?

src/bootstrap/dist.rs

Mark-Simulacrum · 2021-02-12T02:41:59Z

For the bootstrap tests, I'd recommend an x.py build locally that tries to reproduce it (--dry-run should help with getting quick results), and running with -vvv to see what is invoking the newly added rustc builds. I suspect it's something in the codegenbackend step in compile.rs, but haven't investigated myself (and would prefer not to).

bjorn3 · 2021-02-12T11:00:47Z

--dry-run should help with getting quick results

Thanks for the tip!

I got this with download-ci-llvm:

$ ./x.py build --dry-run -v
[...]
running: /home/bjorn/Documenten/rust/build/bootstrap/debug/bootstrap build --dry-run -v
thread 'main' panicked at 'std::fs::read_to_string(ci_llvm.join("link-type.txt")) failed with No such file or directory (os error 2)', src/bootstrap/config.rs:823:33
stack backtrace:
   0: rust_begin_unwind
             at /rustc/05b6023675d77979637b04a350c85903fbf59257/library/std/src/panicking.rs:493:5
   1: std::panicking::begin_panic_fmt
             at /rustc/05b6023675d77979637b04a350c85903fbf59257/library/std/src/panicking.rs:435:5
   2: bootstrap::config::Config::parse
             at ./src/bootstrap/config.rs:823:33
   3: bootstrap::main
             at ./src/bootstrap/bin/main.rs:14:18

Disabling it fixes the problem.

bjorn3 · 2021-02-12T13:05:44Z

Previously it would build assemble stage 1 -> (rustc stage 0 and codegen backend stage 0) and std stage 1. Now it also builds codegen backend stage 1 -> rustc stage 1. Removing the DEFAULT override in the Step implementation fixed it.

bjorn3 · 2021-02-12T13:51:01Z

Let's check if the rustup component is correctly generated.

@bors try

bors · 2021-02-12T13:51:17Z

⌛ Trying commit 909dbc1857b49279156b64061c13ab55c9f03b80 with merge 4bbf0fa74cbc11268c4f6f9d641e12b360065fc1...

bors · 2021-02-12T14:40:23Z

☀️ Try build successful - checks-actions
Build commit: 4bbf0fa74cbc11268c4f6f9d641e12b360065fc1 (4bbf0fa74cbc11268c4f6f9d641e12b360065fc1)

bjorn3 · 2021-02-12T15:09:29Z

I must have made a mistake somewhere. rustup-toolchain-install-master 4bbf0fa74cbc11268c4f6f9d641e12b360065fc1 -c rustc-codegen-cranelift fails, while -c miri and -c rust-analyzer work.

bjorn3 · 2021-02-13T18:37:20Z

I think I should wire up compiler/rustc_codegen_cranelift to the tidy license checking. It isn't currently checked due to being in a different workspace as far as I know.

bjorn3 · 2021-02-19T17:07:47Z

@bors try

bors · 2021-02-19T17:07:58Z

⌛ Trying commit de705b10023b1ed5b9ad92810e3a0ea1dc29caee with merge 874d9737dc9cca284c21e5b4aaf40bf57502947f...

…rk-Simulacrum Distribute cg_clif as rustup component on the nightly channel This makes it possible to use cg_clif using: ```bash $ rustup component add rustc-codegen-cranelift-preview --toolchain nightly $ RUSTFLAGS="-Zcodegen-backend=cranelift" cargo +nightly build ``` cc rust-lang/compiler-team#405. r? `@Mark-Simulacrum`

pass `CODEGEN_BACKENDS` to docker The backends to build are now defined in the `CODEGEN_BACKENDS` env var. It's correctly set in CI, but wasn't passed to docker, hence cg_clif wasn't actually built in rust-lang#81746. r? `@Kobzol:` I locally tried `CODEGEN_BACKENDS="cranelift" DEPLOY=1 src/ci/docker/run.sh dist-x86_64-linux` and this change was enough for `ci/run.sh` to read the env var. So I'll try as-is and we'll see.

tgross35 · 2023-10-30T17:58:05Z

I can't be the only one with this question - how does one actually put this to use after rustup component add rustc-codegen-cranelift-x86_64-unknown-linux-gnu?

Edit: I thought #117328 landed by rustc 1.75.0-nightly (608e9682f 2023-10-29) but I guess not. Once it does, seems it will just work by passing rustc -Zcodegen-backend=??

Skgland · 2023-10-30T19:00:21Z

I can't be the only one with this question - how does one actually put this to use after rustup component add rustc-codegen-cranelift-x86_64-unknown-linux-gnu?

That looks like you are mixing the cranelift codegen backend component with the compilation target toolchain.

Edit: I thought #117328 landed by rustc 1.75.0-nightly (608e9682f 2023-10-29) but I guess not. Once it does, seems it will just work by passing rustc -Zcodegen-backend=??

As github sais this was merged two days ago I would have expected this to be in the current nightly and based on the PR description I would expect the following to work

depending on whether nightly is installed
a. rustup toolchain install nightly
b. rustup toolchain update
rustup component add rustc-codegen-cranelift-preview --toolchain nightly
RUSTFLAGS="-Zcodegen-backend=cranelift" cargo +nightly build

1b and 2 succeeded the later suprisingly quickly, but 3 failed with

$ RUSTFLAGS="-Zcodegen-backend=cranelift" cargo +nightly build
error: failed to run `rustc` to learn about target-specific information

Caused by:
  process didn't exit successfully: `/home/bennet/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustc - --crate-name ___ --print=file-names -Zcodegen-backend=cranelift --crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib --crate-type staticlib --crate-type proc-macro --print=sysroot --print=split-debuginfo --print=crate-name --print=cfg` (exit status: 1)
  --- stderr
  error: failed to find a `codegen-backends` folder in the sysroot candidates:
         * /home/bennet/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu
         * /home/bennet/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu

Kobzol · 2023-10-30T19:02:42Z

The build of the cranelift component wasn't working in this PR. It was fixed in #117328, so it should hopefully work in tomorrow's nightly.

tgross35 · 2023-10-30T19:04:49Z

I can't be the only one with this question - how does one actually put this to use after rustup component add rustc-codegen-cranelift-x86_64-unknown-linux-gnu?

That looks like you are mixing the cranelift codegen backend component with the compilation target toolchain.

I think rustc-codegen-cranelift-preview is just a shortcut to the component rustc-codegen-cranelift-x86_64-unknown-linux-gnu (host target as applicable), I just didn't know about it since it doesn't show up in rustup component list

Edit: I thought #117328 landed by rustc 1.75.0-nightly (608e9682f 2023-10-29) but I guess not. Once it does, seems it will just work by passing rustc -Zcodegen-backend=??

As github sais this was merged two days ago I would have expected this to be in the current nightly and based on the PR description I would expect the following to work

Opened two days ago but merged 15 hours ago

g2p · 2023-10-30T21:30:23Z

~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/manifest-rustc-codegen-cranelift-preview-x86_64-unknown-linux-gnu is just a handful of documentation files, until the pipeline is entirely working.

tgross35 · 2023-10-31T17:16:07Z

2023-10-30 nightly indeed works! rustc -Zcodegen-backend=cranelift / RUSTFLAGS=-Zcodegen-backend=cranelift cargo build

lqd · 2023-10-31T17:23:29Z

@tgross35 https://bjorn3.github.io/2023/10/31/progress-report-oct-2023.html also describes the couple of other ways you can use cargo's support for selecting the backend to use.

Now that cranelift is distributed with Rustup, I find myself constantly searching for the rust-lang/rust#81746 PR. I think that it would be useful to also describe the Rustup installation/usage instructions here in README.

…r=albertlarsan68 Distribute rustc_codegen_cranelift for Windows With support for raw-dylib recently added to cg_clif, and inline assembly support working on Windows for quite a while now, all blockers for distributing cg_clif on Windows that I mentioned in rust-lang#81746 (comment) are fixed now.

…albertlarsan68 Distribute rustc_codegen_cranelift for Windows With support for raw-dylib recently added to cg_clif, and inline assembly support working on Windows for quite a while now, all blockers for distributing cg_clif on Windows that I mentioned in rust-lang#81746 (comment) are fixed now.

…san68 Distribute rustc_codegen_cranelift for Windows With support for raw-dylib recently added to cg_clif, and inline assembly support working on Windows for quite a while now, all blockers for distributing cg_clif on Windows that I mentioned in rust-lang/rust#81746 (comment) are fixed now.

bjorn3 added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. A-cranelift Things relevant to the [future] cranelift backend labels Feb 4, 2021

rust-highfive assigned Mark-Simulacrum Feb 4, 2021

rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Feb 4, 2021

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bjorn3 force-pushed the cg_clif_rustup_component branch from 8b5ccb9 to c341ecf Compare February 8, 2021 08:54

Mark-Simulacrum reviewed Feb 12, 2021

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bjorn3 mentioned this pull request Feb 13, 2021

Add a profile option to select the codegen backend rust-lang/cargo#9118

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oxalica mentioned this pull request Oct 30, 2023

Add rustc-codegen-cranelift component to rust-overlay for nightly oxalica/rust-overlay#142

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Automated pull from upstream master ferrocene/ferrocene#74

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lqd mentioned this pull request Oct 31, 2023

CI: Bootstrap no longer documents compiler crates #117430

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Kobzol mentioned this pull request Nov 9, 2023

Add Rustup installation instructions to README rust-lang/rustc_codegen_cranelift#1421

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Distribute GCC backend rust-lang/rustup#3756

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Distribute rustc_codegen_cranelift for Windows #128939

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Distribute cg_clif as rustup component on the nightly channel #81746

Distribute cg_clif as rustup component on the nightly channel #81746

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Distribute cg_clif as rustup component on the nightly channel #81746

Distribute cg_clif as rustup component on the nightly channel #81746

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