Вот как?
$ ls -1 ../CMakeModules/
FindCal3d.cmake
...
$ cmake ..
CMake Error at CMakeLists.txt:79 (FIND_PACKAGE):
By not providing "FindCal3d.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Cal3d", but
CMake did not find one.
...