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build libcxx-version only when it doesn't exist

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Signed-off-by: onur-ozkan <work@onurozkan.dev>
This commit is contained in:
onur-ozkan 2024-06-14 12:46:39 +03:00
parent d2ad293851
commit ad787c1034
1 changed files with 20 additions and 10 deletions
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30
src/bootstrap/src/core/build_steps/tool.rs
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@ -823,19 +823,29 @@ impl Step for LibcxxVersionTool {
fn run(self, builder: &Builder<'_>) -> LibcxxVersion {
let out_dir = builder.out.join(self.target.to_string()).join("libcxx-version");
let _ = fs::remove_dir_all(&out_dir);
t!(fs::create_dir_all(&out_dir));
let compiler = builder.cxx(self.target).unwrap();
let mut cmd = Command::new(compiler);
let executable = out_dir.join(exe("libcxx-version", self.target));
cmd.arg("-o").arg(&executable).arg(builder.src.join("src/tools/libcxx-version/main.cpp"));
builder.run_cmd(&mut cmd);
// This is a sanity-check specific step, which means it is frequently called (when using
// CI LLVM), and compiling `src/tools/libcxx-version/main.cpp` at the beginning of the bootstrap
// invocation adds a fair amount of overhead to the process (see https://github.com/rust-lang/rust/issues/126423).
// Therefore, we want to avoid recompiling this file unnecessarily.
if !executable.exists() {
panic!("Something went wrong. {} is not present", executable.display());
if !out_dir.exists() {
t!(fs::create_dir_all(&out_dir));
}
let compiler = builder.cxx(self.target).unwrap();
let mut cmd = Command::new(compiler);
cmd.arg("-o")
.arg(&executable)
.arg(builder.src.join("src/tools/libcxx-version/main.cpp"));
builder.run_cmd(&mut cmd);
if !executable.exists() {
panic!("Something went wrong. {} is not present", executable.display());
}
}
let version_output = output(&mut Command::new(executable));