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68 lines
2.4 KiB
Rust
68 lines
2.4 KiB
Rust
// Test linking using `cc` with `rust-lld`, using the unstable CLI 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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//@ needs-rust-lld
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//@ ignore-s390x lld does not yet support s390x as target
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use std::process::Output;
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use run_make_support::regex::Regex;
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use run_make_support::{is_msvc, rustc};
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fn main() {
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// lld-link is used if msvc, otherwise a gnu-compatible lld is used.
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let linker_version_flag = if is_msvc() { "--version" } else { "-Wl,-v" };
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// Opt-in to lld and the self-contained linker, to link with rust-lld. We'll check that by
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// asking 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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.arg("-Zlinker-features=+lld")
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.arg("-Clink-self-contained=+linker")
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.arg("-Zunstable-options")
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.link_arg(linker_version_flag)
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.input("main.rs")
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.run();
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assert!(
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find_lld_version_in_logs(output.stderr_utf8()),
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"the LLD version string should be present in the output logs:\n{}",
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output.stderr_utf8()
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);
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// It should not be used when we explicitly opt-out of lld.
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let output = rustc()
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.env("RUSTC_LOG", "rustc_codegen_ssa::back::link=info")
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.link_arg(linker_version_flag)
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.arg("-Zlinker-features=-lld")
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.input("main.rs")
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.run();
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assert!(
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!find_lld_version_in_logs(output.stderr_utf8()),
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"the LLD version string should not be present in the output logs:\n{}",
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output.stderr_utf8()
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);
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// While we're here, also check that the last linker feature flag "wins" when passed multiple
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// times to rustc.
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let output = rustc()
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.env("RUSTC_LOG", "rustc_codegen_ssa::back::link=info")
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.link_arg(linker_version_flag)
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.arg("-Clink-self-contained=+linker")
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.arg("-Zunstable-options")
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.arg("-Zlinker-features=-lld")
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.arg("-Zlinker-features=+lld")
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.arg("-Zlinker-features=-lld,+lld")
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.input("main.rs")
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.run();
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assert!(
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find_lld_version_in_logs(output.stderr_utf8()),
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"the LLD version string should be present in the output logs:\n{}",
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output.stderr_utf8()
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);
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}
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fn find_lld_version_in_logs(stderr: String) -> bool {
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let lld_version_re = Regex::new(r"^LLD [0-9]+\.[0-9]+\.[0-9]+").unwrap();
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stderr.lines().any(|line| lld_version_re.is_match(line.trim()))
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}
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