bjoernager/rust
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hook up tracing to cg_cranelift

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this was easier than expected. here is an example of using RUSTC_LOG with a build of cranelift from rust-lang/rust:
```
$ RUSTC_LOG=rustc_codegen_cranelift cargo +stage1 b
   Compiling example v0.1.0 (/home/jyn/src/example)
 INFO rustc_codegen_cranelift codegen crate example
 INFO rustc_codegen_cranelift codegen crate example
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.44s
```
This commit is contained in:
jyn 2024-12-18 17:53:16 -05:00
commit b046e32262
1 changed files with 3 additions and 0 deletions
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3
src/lib.rs
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@ -27,6 +27,8 @@ extern crate rustc_metadata;
extern crate rustc_session;
extern crate rustc_span;
extern crate rustc_target;
#[macro_use]
extern crate tracing;
// This prevents duplicating functions and statics that are already part of the host rustc process.
#[allow(unused_extern_crates)]
@ -208,6 +210,7 @@ impl CodegenBackend for CraneliftCodegenBackend {
need_metadata_module: bool,
) -> Box<dyn Any> {
tcx.dcx().abort_if_errors();
info!("codegen crate {}", tcx.crate_name(LOCAL_CRATE));
let config = self.config.clone().unwrap_or_else(|| {
BackendConfig::from_opts(&tcx.sess.opts.cg.llvm_args)
.unwrap_or_else(|err| tcx.sess.dcx().fatal(err))