Any plans for more versions of LLVM?

[xxuejie]

Hey there,

I ran across this project for a quite similar use case: I was building a LLVM based compiler that basically compiles RISC-V assembly to x86_64(and possibly more architecture) assembly. Since LLVM emits object code, I was using a linker previously, but as lld-rs shows, this can be done via linking against lld directly in the Rust code.

I do want to use lld-rs instead of re-inventing the same thing, but unfortunately I'm using LLVM 15 now while lld-rs only supports LLVM 14 in the main branch. I did notice stale branches related to LLVM 15, which makes me want to check here: what plan do you have in mind for maintaining multiple LLVM versions? I do understand upgrading a major version of LLVM can be risky and Mun might stick to LLVM 14 for a while, but just want to consult here: any plan on supporting more LLVM versions at the same time, like what inkwell does now?

[baszalmstra]

The current approach is to bump lld-rs to 150.0.0 when upgrading to LLVM 15. This is similar to how llvm-sys works.

I think the bump/llvm_15 branch should already work correctly. If you want to try that branch and check if that works for your usecase Id be happy to merge it.

[xxuejie]

Thanks for your reply! I did give lld-rs in bump/llvm_15 branch a try, and it seems to be working fine for my use case. So I do appreciate it if you can spend some time to merge the branch and release a new version of lld-rs for LLVM 15.