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update rust offload bootstrap #141938

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Jun 5, 2025
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update rust offload bootstrap #141938

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15 changes: 9 additions & 6 deletions src/bootstrap/src/core/build_steps/llvm.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -443,23 +443,26 @@ impl Step for Llvm {
// See https://github.com/rust-lang/rust/pull/50104
cfg.define("LLVM_ENABLE_LIBXML2", "OFF");

if !enabled_llvm_projects.is_empty() {
enabled_llvm_projects.sort();
enabled_llvm_projects.dedup();
cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
}

let mut enabled_llvm_runtimes = Vec::new();

if helpers::forcing_clang_based_tests() {
enabled_llvm_runtimes.push("compiler-rt");
}

// This is an experimental flag, which likely builds more than necessary.
// We will optimize it when we get closer to releasing it on nightly.
if builder.config.llvm_offload {
enabled_llvm_runtimes.push("offload");
//FIXME(ZuseZ4): LLVM intends to drop the offload dependency on openmp.
//Remove this line once they achieved it.
enabled_llvm_runtimes.push("openmp");
enabled_llvm_projects.push("compiler-rt");
}

if !enabled_llvm_projects.is_empty() {
enabled_llvm_projects.sort();
enabled_llvm_projects.dedup();
cfg.define("LLVM_ENABLE_PROJECTS", enabled_llvm_projects.join(";"));
}

if !enabled_llvm_runtimes.is_empty() {
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