Could not find libR shared library.
CMake Error at /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:91 (MESSAGE):
  Could NOT find LibR (missing: LIBR_LIBRARIES)
Call Stack (most recent call first):
  /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:252 (_FPHSA_FAILURE_MESSAGE)
  cmake/modules/FindLibR.cmake:158 (find_package_handle_standard_args)
  src/cpp/CMakeLists.txt:142 (find_package)