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50 lines
1.7 KiB
Rust
50 lines
1.7 KiB
Rust
// Test linking using `cc` with `rust-lld`, using a custom target with features described in MCP 510
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// see https://github.com/rust-lang/compiler-team/issues/510 for more info:
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//
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// Starting from the `x86_64-unknown-linux-gnu` target spec, we add the following options:
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// - a linker-flavor using lld via a C compiler
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// - the self-contained linker component is enabled
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//@ needs-rust-lld
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//@ only-x86_64-unknown-linux-gnu
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use run_make_support::regex::Regex;
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use run_make_support::rustc;
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use std::process::Output;
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fn main() {
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// Compile to a custom target spec with rust-lld enabled by default. We'll check that by asking
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// the linker to display its version number with a link-arg.
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let output = rustc()
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.env("RUSTC_LOG", "rustc_codegen_ssa::back::link=info")
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.crate_type("cdylib")
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.target("custom-target.json")
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.link_arg("-Wl,-v")
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.input("lib.rs")
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.run();
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assert!(
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find_lld_version_in_logs(output),
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"the LLD version string should be present in the output logs"
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);
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// But it can also be disabled via linker features.
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let output = rustc()
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.env("RUSTC_LOG", "rustc_codegen_ssa::back::link=info")
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.crate_type("cdylib")
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.target("custom-target.json")
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.arg("-Zlinker-features=-lld")
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.link_arg("-Wl,-v")
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.input("lib.rs")
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.run();
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assert!(
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!find_lld_version_in_logs(output),
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"the LLD version string should not be present in the output logs"
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);
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}
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fn find_lld_version_in_logs(output: Output) -> bool {
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let lld_version_re = Regex::new(r"^LLD [0-9]+\.[0-9]+\.[0-9]+").unwrap();
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let stderr = std::str::from_utf8(&output.stderr).unwrap();
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stderr.lines().any(|line| lld_version_re.is_match(line))
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}
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