`*-alpine-linux-musl` custom targets

[fossdd]

Hi, Alpine Linux contributor here.

I saw that you changed the target parsing and that the shipped target info doesn't include our own custom Alpine targets, which link dynamically than static.

It seems to me that this currently blocks the Rust upgrade to 1.85.0 since Rust 1.85 ships cc-1.2.x.

It would be nice to know what the best way forward would be here, if you have any idea. Thank you!

[q66]

same with *-chimera-linux-musl targets, and i've arleady run into this elsewhere, like tree-sitter cli tool breaking its test command due to cc-rs raising an error at runtime (it never did so before)

i'm currently bumping up to 1.85 and i decided to add patches to the generated list in the vendored crate, but i feel like this is going to bite me in a lot of places starting very soon

[CutestNekoAqua]

I suggest proper dynamic parsing than static lists.

[ChrisDenton]

Similar to #1405, I believe this is a dup of #1317

[awilfox]

it does seem related to #1317, yes. Chiming in as the maintainer of the *-foxkit-linux-musl triplet (which is used by Adélie Linux and in addition to dynamically linking musl also defines MMX as available on i586).

[fossdd]

Similar to #1405, I believe this is a dup of #1317

Yeah, only that the error message (https://github.com/rust-lang/cc-rs/blob/main/src/target.rs#L75) led me to believe that there was a solution for custom targets, which apparently is not the case.

[NobodyXu]

We can parse the target and replace -alpine- and other os with -unknown-