Add unstable --print=supported-crate-types option by jieyouxu · Pull Request #138641 · rust-lang/rust (original) (raw)

MCP: rust-lang/compiler-team#836
Tracking issue: #138640

Test coverage

Two tests:

1. tests/ui/print-request/stability.rs to check that --print=supported-crate-types is -Zunstable-options-gated
2. tests/ui/print-request/supported-crate-types.rs is added as a basic smoke test. Observe that the compiler stdout corresponds to the below Example output section (e.g. proc-macro is unsupported on wasm32-unknown-unknown currently).

Example output

For `x86_64-unknown-linux-gnu`

Notice the presence of {c,}dylib and proc-macro:

bin
cdylib
dylib
lib
proc-macro
rlib
staticlib

For `wasm32-unknown-unknown`

Notice the absence of dylib and proc-macro:

bin
cdylib
lib
rlib
staticlib

For `x86_64-unknown-linux-musl`

Notice the absence of {c,}dylib but presence of proc-macro:

bin
lib
proc-macro
rlib
staticlib

Documentation

I added an entry in the unstable book's print request section to document this supported-crate-types print request.

Unresolved questions

• (Name bikeshedding) is supported-crate-types a good name for the print request? I'm inclined to say it's good enough for an unstable print request, but may be worth revisiting at stabilization time.

Stability

This print request being added is unstable in this PR. A separate stabilization PR following the usual compiler flag stabilization procedure should be filed for stabilization after some baking time.

Review remarks

Best reviewed commit-by-commit.

r? compiler