如何安装旧版本的 rust-src？

Question

My machine have rust nightly-2020-03-24, I want to compile cross-compile crate core. But the command rustup component add rust-src install newest version of rust-src, which rustc-2020-03-24 can't build (due to new feature llvm-asm). How can I install old version of rust-src?

Answer 1

If not already installed, you can get a specific version of a component by specifying the toolchain when calling rustup (like +stable , +1.44 , etc). In your case:

rustup +nightly-2020-03-24 component add rust-src 

The source can then be found in ~/.rustup/toolchains/nightly-2020-03-24-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/ .