build failed with LLVM11 on WSL

[chenyukang]

Summary

Seems we just moved to LLVM11 recently.
I'm trying to build with llvm, and stuck at this error.

make build-wasmer will report this error:

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

error: aborting due to previous error

error: could not compile `llvm-sys`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: build failed
make: *** [Makefile:341: build-wasmer] Error 101

Additional details

There is only dynamic library in llvm-11/lib:

~/wasmer$ ls -l /usr/lib/llvm-11/lib | grep Polly
-rw-r--r-- 1 root root  3783072 Oct 30  2020 LLVMPolly.so

I use this command to install llvm11 on WSL:

sudo apt-get install llvm-11*

[chenyukang]

@jubianchi Do you know how to resolve this?

[chenyukang]

It seems an issue for llvm-sys.
Rollback to llvm10 will be OK:

--- a/lib/compiler-llvm/Cargo.toml
+++ b/lib/compiler-llvm/Cargo.toml
@@ -28,7 +28,7 @@ loupe = "0.1"
 package = "wasmer_inkwell"
 version = "0.2.0-alpha.2"
 default-features = false
-features = ["llvm11-0", "target-x86", "target-aarch64"]
+features = ["llvm10-0", "target-x86", "target-aarch64"]

[Hywan]

Please open an issue for llvm-sys or inkweel. I've never tried to install LLVM through WSL, I don't know what to expect in that situation.

[Hywan]

@chenyukang Did you open an issue on inkwell or llvm-sys?

[chenyukang]

@chenyukang Did you open an issue on inkwell or llvm-sys?

I haven't, a little busy recently, I may need more investigation about it.

[chenyukang]

I opened an issue for llvm-sys.rs：
https://gitlab.com/taricorp/llvm-sys.rs/-/issues/16

[chenyukang]

It turns out there is a bug for Ubuntu distribution: https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-11/+bug/1934927
as a workaround, we could use this command to fix it:

sudo apt-get install libclang-common-11-dev

[Hywan]

It would be good to document that somewhere. Maybe in the lib/compiler-llvm/README.md file? What do you think?

[Hywan]

And thank you for your investigation!

[chenyukang]

It would be good to document that somewhere. Maybe in the lib/compiler-llvm/README.md file? What do you think?

Good idea, let me open a PR.

[Hywan]

@chenyukang can we close the issue now :-)?

[chenyukang]

I think this may take a long time. https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-11/+bug/1934927
And our document had added:

wget https://apt.llvm.org/llvm.sh -O /tmp/llvm.sh
sudo bash /tmp/llvm.sh 11

https://apt.llvm.org/llvm.sh is the right way to install LLVM related packages, don't have this issue.

[Hywan]

I understand this is a yes, we can close the issue :-).