== 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`.
