Do something about the `sparc` CI job

[tgross35]

Most CI jobs take about 5 minutes but sparc64-unknown-linux-gnu takes about 25 minutes. I think this is because it is the only job that uses qemu-system vs qemu-user.

It would be nice to somehow get this job's runtime closer to the other jobs. It might be possible to replace qemu-system somehow, or even just do something like only run the job once the PR is in the merge queue (i.e. don't require sparc to complete in PR CI).

[folkertdev]

to try to debug this, it would be really useful if the script could be run locally, but I'm running into compile failures

>  sudo sh ci/run-docker.sh sparc64-unknown-linux-gnu
... stuff ...
+ docker run --rm --user 0:0 --env LIBC_CI --env LIBC_CI_ZBUILD_STD --env CARGO_HOME=/cargo --env CARGO_TARGET_DIR=/checkout/target --volume .:/cargo --volume /home/folkertdev/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu:/rust:ro --volume /home/folkertdev/rust/libc:/checkout:ro --volume /home/folkertdev/rust/libc/target:/checkout/target --init --workdir /checkout libc-sparc64-unknown-linux-gnu sh -c HOME=/tmp PATH=$PATH:/rust/bin exec ci/run.sh sparc64-unknown-linux-gnu
+ mirrors_url=https://ci-mirrors.rust-lang.org/libc
+ target=sparc64-unknown-linux-gnu
+ [ -n  ]
+ [ sparc64-unknown-linux-gnu = s390x-unknown-linux-gnu ]
+ cargo test --no-default-features --manifest-path libc-test/Cargo.toml --target sparc64-unknown-linux-gnu
   Compiling quote v1.0.21
   Compiling dirs-sys v0.3.7
   Compiling rustc_version v0.4.0
   Compiling cc v1.0.83
   Compiling libc v1.0.0-alpha.1 (/checkout)
   Compiling dirs v2.0.2
   Compiling term v0.6.1
   Compiling syn v1.0.99
   Compiling serde_derive v1.0.143
   Compiling serde v1.0.143
   Compiling garando_pos v0.1.0
   Compiling serde_json v1.0.83
   Compiling garando_errors v0.1.0
   Compiling garando_syntax v0.1.0
   Compiling ctest2 v0.4.8
error[E0061]: this function takes 3 arguments but 2 arguments were supplied
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/ctest2-0.4.8/src/lib.rs:2525:25
     |
2525 |                 Rc::new(macro_rules::compile(self.parse_sess, item)),
     |                         ^^^^^^^^^^^^^^^^^^^^                  ---- argument #2 of type `&RefCell<Features>` is missing
     |
note: function defined here
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/garando_syntax-0.1.0/src/ext/tt/macro_rules.rs:172:8
     |
172  | pub fn compile(sess: &ParseSess, features: &RefCell<Features>, def: &ast::Item) -> SyntaxExtension {
     |        ^^^^^^^
help: provide the argument
     |
2525 |                 Rc::new(macro_rules::compile(self.parse_sess, /* &RefCell<Features> */, item)),
     |                                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

For more information about this error, try `rustc --explain E0061`.
error: could not compile `ctest2` (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...

for some reason the sysroot in this line --volume "$(rustc --print sysroot)":/rust:ro \ does not expand by itself (it's the empty string, even though when I run that rustc command in the terminal it does work). I've patched that, but then get this build failure.

So, I guess, how do I run the sparc CI job locally?

[tgross35]

Which OS are you on? I can't check right now but I think some of these jobs use your local ~/.rustup which caused problems when I was on macos.

I'm not really sure, I haven't run these either. But I will try it out later

[folkertdev]

Linux Mint 22 features a Linux kernel 6.8 and an Ubuntu 24.04 package base.

so effectively a fairly recent ubuntu

[tgross35]

Comparing to what CI is saying:

+ docker run --rm --user 1001:118 --env LIBC_CI --env LIBC_CI_ZBUILD_STD --env CARGO_HOME=/cargo --env CARGO_TARGET_DIR=/checkout/target --volume /home/runner/.cargo:/cargo --volume /home/runner/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu:/rust:ro --volume /home/runner/work/libc/libc:/checkout:ro --volume /home/runner/work/libc/libc/target:/checkout/target --init --workdir /checkout libc-sparc64-unknown-linux-gnu sh -c HOME=/tmp PATH=$PATH:/rust/bin exec ci/run.sh sparc64-unknown-linux-gnu

The script has default_cargo_home="$(dirname "$(dirname "$(command -v cargo)")")", looks like that might not be expanding on your system since it has --volume .:/cargo. Also looks like root shouldn't be needed based on uid

[tgross35]

Also echo --volume "$(rustc --print sysroot)":/rust:ro works fine on my system and apparently CI, I'm not sure why it wouldn't on yours. #!/bin/sh isn't linked to something weirder than dash is it?

[folkertdev]

it's a sudo thing, apparently? without sudo the paths are fine. so I'm fighting docker now so that I don't need to use sudo when invoking the script?!

[folkertdev]

just caved and ran the whole thing as root...

I suspect the real issue is the version of garando_syntax, on CI

   Compiling garando_syntax v0.1.1
   Compiling ctest2 v0.4.8
   Compiling libc-test v0.1.0 (/checkout/libc-test)
    Finished `test` profile [unoptimized + debuginfo] target(s) in 1m 20s

versus locally

   Compiling garando_syntax v0.1.0
   Compiling ctest2 v0.4.8
error[E0061]: this function takes 3 arguments but 2 arguments were supplied
    --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/ctest2-0.4.8/src/lib.rs:2525:25
     |
2525 |                 Rc::new(macro_rules::compile(self.parse_sess, item)),
     |                         ^^^^^^^^^^^^^^^^^^^^                  ---- argument #2 of type `&RefCell<Features>` is missing

so, is there some sort of version/edition/solver difference that locally selects the older version of garando_syntax? I can't really think of anything. I'm not sure where/how to force that later version.

edit: running cargo update garando_syntax --precise 0.1.1 did the trick. The 0.1.0 version should be yanked really, it's just broken