I compiled and installed LLVM from trunk on debian wheezy some weeks ago (configure & make) and now tried to out of source compile the llvm-mutate pass. AFAICC, llvm-mut
Adding to alexei's reply.
You can lso add list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_DIR}") in the CMakeLists.txt file prior to the include(AddLLVM) line and then having in your PATH the LLVM binary directory for llvm-config,
invoke cmake as
CXX=clang++ cmake -DLLVM_DIR=$(llvm-config --prefix)/share/llvm/cmake ..