/usr/bin/ld: cannot find -lPolly

Hi everyone,

i want to compile llvm and clang, i'm using the following cmake command:

cmake -DCMAKE_BUILD_TYPE:String=Release
-DLLVM_ENABLE_PROJECTS:String="llvm,clang,lli" ../llvm

But i get the error:

/usr/bin/ld: cannot find -lPolly

How to install the dependencies for llvm and clang on debian stable ??

best regards!