To use this repository to build mongrel2-cpp into a CMake project, add this as a submodule:
git submodule add https://github.com/cpick/mongrel2-cpp-cmake.git
Add it as a subdirctory in the project's CMakeLists.txt and then link against ${M2PP_LIBRARIES}:
add_submodule(mongrel2-cpp-cmake)
...
target_link_libraries(executable ${M2PP_LIBRARIES})