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Offload bootstrap #148671

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e668803
update offload build steps
ZuseZ4 Nov 7, 2025
861cb3b
I surely picked the wrong runner again, right?
ZuseZ4 Nov 7, 2025
2645d28
try fix
ZuseZ4 Nov 7, 2025
7d691c9
try fix
ZuseZ4 Nov 8, 2025
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12 changes: 11 additions & 1 deletion src/bootstrap/src/core/build_steps/llvm.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -460,7 +460,17 @@ impl Step for Llvm {
//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");
enabled_llvm_runtimes.push("compiler-rt");

// -DRUNTIMES_CMAKE_ARGS="-DLIBOMPTARGET_PLUGINS_TO_BUILD=amdgpu;nvptx;
cfg.define("RUNTIMES_CMAKE_ARGS", "-DLIBOMPTARGET_PLUGINS_TO_BUILD=amdgpu;nvptx");
//cfg.define("LLVM_TARGETS_TO_BUILD", "host;AMDGPU;NVPTX");

//let runtime_targets = vec!["default", "amdgcn-amd-amdhsa", "nvptx64-nvidia-cuda"];
//cfg.define("LLVM_RUNTIME_TARGETS", runtime_targets.join(";"));

//cfg.define("RUNTIMES_nvptx64-nvidia-cuda_LLVM_ENABLE_RUNTIMES", "openmp");
//cfg.define("RUNTIMES_amdgcn-amd-amdhsa_LLVM_ENABLE_RUNTIMES", "openmp");
}

if !enabled_llvm_projects.is_empty() {
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2 changes: 2 additions & 0 deletions src/ci/docker/host-x86_64/dist-x86_64-linux/Dockerfile
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Expand Up @@ -90,6 +90,8 @@ ENV RUST_CONFIGURE_ARGS \
--set target.x86_64-unknown-linux-gnu.ranlib=/rustroot/bin/llvm-ranlib \
--set llvm.thin-lto=true \
--set llvm.ninja=false \
--set llvm.offload=true \
--set llvm.clang=true \
--set llvm.libzstd=true \
--set rust.jemalloc \
--set rust.bootstrap-override-lld=true \
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