rust-lang / rust · Issue No. 160584

bootstrap build order - missing lld for autodiff/offload

Openby ZuseZ4opened Aug 5, 2026updated Aug 6, 20263 comments

T-bootstrapC-bugF-autodiffF-gpu_offload

Description

Summary

Mostly an issue for new setups (e.g. clean server nodes)
I usually want to build autodiff, offload, clang, lld, llvm and rustc.
Autodiff has the problem that it has few, but huge, object files, so gnu-ld takes multiple minutes to link, and later offload steps straight-up fail without another lld on path. I should move the enzyme/lld builds to be one of the last steps, so that lld is available by then.

Command used

./x build --stage 1 library

Expected behaviour

We first run the lld step, then other ones.

Actual behaviour

Bootstrap configuration (bootstrap.toml)

https://rustc-dev-guide.rust-lang.org/offload/installation.html#build-instructions

Operating system

linux

HEAD

latest main

Relay Analysis

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