rust/tests/run-make/rust-lld-by-default/rmake.rs

44 lines
1.4 KiB
Rust

// Ensure that rust-lld is used as the default linker on `x86_64-unknown-linux-gnu`, and that it can
// also be turned off with a CLI flag.
//@ needs-rust-lld
//@ only-x86_64-unknown-linux-gnu
extern crate run_make_support;
use run_make_support::regex::Regex;
use run_make_support::rustc;
use std::process::Output;
fn main() {
// A regular compilation should use rust-lld by default. We'll check that by asking the linker
// to display its version number with a link-arg.
let output = rustc()
.env("RUSTC_LOG", "rustc_codegen_ssa::back::link=info")
.link_arg("-Wl,-v")
.input("main.rs")
.run();
assert!(
find_lld_version_in_logs(output),
"the LLD version string should be present in the output logs"
);
// But it can still be disabled by turning the linker feature off.
let output = rustc()
.env("RUSTC_LOG", "rustc_codegen_ssa::back::link=info")
.link_arg("-Wl,-v")
.arg("-Zlinker-features=-lld")
.input("main.rs")
.run();
assert!(
!find_lld_version_in_logs(output),
"the LLD version string should not be present in the output logs"
);
}
fn find_lld_version_in_logs(output: Output) -> bool {
let lld_version_re = Regex::new(r"^LLD [0-9]+\.[0-9]+\.[0-9]+").unwrap();
let stderr = std::str::from_utf8(&output.stderr).unwrap();
stderr.lines().any(|line| lld_version_re.is_match(line))
}