Can't find Polly :( (tried the other posted issue too )

[Monsieur-Gray]

Compiling llvm-sys v160.1.4
Compiling inkwell v0.4.0 (https://github.com/TheDan64/inkwell?branch=master#5d5a531c)
error: could not find native static library Polly, perhaps an -L flag is missing?

error: could not compile llvm-sys (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...

[amunra]

I hit this too, but I hadn't installed the whole of LLVM.

I solved it on Ubuntu by following https://apt.llvm.org/:

wget https://apt.llvm.org/llvm.sh
chmod +x llvm.sh
sudo ./llvm.sh <version number> all

[Toni-Graphics]

wget https://apt.llvm.org/llvm.sh
chmod +x llvm.sh
sudo ./llvm.sh all

Thanks, that also worked for my 👍