== System installation == This library is header only. So you can either copy `include/cxxopts.hpp` to `/usr/include` or `/usr/local/include`, or add `include` to your search path. == Building the examples and tests == It is preferable to build out of source. cmake ${CXXOPTS_DIR} make You can use another build tool, such as ninja. cmake -G Ninja ${CXXOPTS_DIR} ninja To run the tests, run `make test`.