97311a8969
This needs more time to bake before we turn it on. Turning it on early risks people silencing the warning indefinitely, before we have the chance to make it less noisy.
51 lines
1.7 KiB
Rust
51 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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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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.crate_type("cdylib")
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.arg("-Wlinker-messages")
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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.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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// But it can also be disabled via linker features.
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let output = rustc()
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.crate_type("cdylib")
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.arg("-Wlinker-messages")
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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.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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}
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fn find_lld_version_in_logs(stderr: String) -> bool {
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let lld_version_re =
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Regex::new(r"^warning: linker stdout: 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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