CMake error: CLANG_LIB set to NOTFOUND

[philtomson]

I'm building with:

cmake ../ -DOCLICD_COMPAT=0 -DCOMPILER=CLANG -DCLANG_LIB=/usr/lib/llvm-3.8/lib/

And I'm getting:

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
CLANG_LIB

I initially tried without the -DCLANG_LIB... on the cmake commandline and got the same error.

(Platform is Ubuntu 16.04)

[MidoriYakumo]

install dependency llvm-devel and clang-devel