bjoernager/rust
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Respect --sysroot for rustc -vV and -Cpasses=list

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This is necessary when the specified codegen backend is in a custom
sysroot.
This commit is contained in:
bjorn3 2025-01-10 10:40:34 +00:00
parent 67951d946a
commit 3b6e3642ce
1 changed files with 20 additions and 14 deletions
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34
compiler/rustc_driver_impl/src/lib.rs
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@ -916,13 +916,7 @@ pub fn version_at_macro_invocation(
safe_println!("host: {}", config::host_tuple());
safe_println!("release: {release}");
let debug_flags = matches.opt_strs("Z");
let backend_name = debug_flags.iter().find_map(|x| x.strip_prefix("codegen-backend="));
let opts = config::Options::default();
let sysroot = filesearch::materialize_sysroot(opts.maybe_sysroot.clone());
let target = config::build_target_config(early_dcx, &opts, &sysroot);
get_codegen_backend(early_dcx, &sysroot, backend_name, &target).print_version();
get_backend_from_raw_matches(early_dcx, matches).print_version();
}
}
@ -1125,19 +1119,31 @@ pub fn describe_flag_categories(early_dcx: &EarlyDiagCtxt, matches: &Matches) ->
}
if cg_flags.iter().any(|x| *x == "passes=list") {
let backend_name = debug_flags.iter().find_map(|x| x.strip_prefix("codegen-backend="));
let opts = config::Options::default();
let sysroot = filesearch::materialize_sysroot(opts.maybe_sysroot.clone());
let target = config::build_target_config(early_dcx, &opts, &sysroot);
get_codegen_backend(early_dcx, &sysroot, backend_name, &target).print_passes();
get_backend_from_raw_matches(early_dcx, matches).print_passes();
return true;
}
false
}
/// Get the codegen backend based on the raw [`Matches`].
///
/// `rustc -vV` and `rustc -Cpasses=list` need to get the codegen backend before we have parsed all
/// arguments and created a [`Session`]. This function reads `-Zcodegen-backend` and `--sysroot`
/// without validating any other arguments and loads the codegen backend based on these arguments.
fn get_backend_from_raw_matches(
early_dcx: &EarlyDiagCtxt,
matches: &Matches,
) -> Box<dyn CodegenBackend> {
let debug_flags = matches.opt_strs("Z");
let backend_name = debug_flags.iter().find_map(|x| x.strip_prefix("codegen-backend="));
let opts = config::Options::default();
let sysroot = filesearch::materialize_sysroot(matches.opt_str("sysroot").map(PathBuf::from));
let target = config::build_target_config(early_dcx, &opts, &sysroot);
get_codegen_backend(early_dcx, &sysroot, backend_name, &target)
}
fn describe_debug_flags() {
safe_println!("\nAvailable options:\n");
print_flag_list("-Z", config::Z_OPTIONS);