llvm-sys doesn't get compiled on ubuntu

[thinkrapido]

Bug Report

error: could not find native static library Polly, perhaps an -L flag is missing?

error: could not compile llvm-sys due to previous error
warning: build failed, waiting for other jobs to finish...

It seams that inkwell is not compiling itself properly, becaus this crate imports llvm-sys

1. Minimal reproduce step (Required)

cargo build

2. What did you expect to see? (Required)

successful compilation

3. What did you see instead (Required)

4. What is your KusionStack components version? (Required)

8ed4c5e (HEAD -> main, tag: v0.4.4, origin/main, origin/HEAD) Feat(kclvm-win): remove the "kclvm.requirements.done.txt" on windows. (#392)

[thinkrapido]

Maybe related wasmerio/wasmer#2435

[Peefy]

@thinkrapido Would you please tell me your ubuntu version and LLVM version? KCLVM needs an LLVM-12 version. You can refer to the development guide.

[thinkrapido]

Ok, I solved it. I had not only to install libllvm but also clang