Need explanation regarding how to build after cloning

Building program_options as part of a boost distribution is easy. But if I clone this repository and want to build the latest version - how do I do that?

Either a README.md should explain this, or if you don't want to "pollute" the hierarchy with that file - at least a Wiki page here on GitHub, or a title link to somewhere explaining how to do it.

Start by checking the repository's README.md and the Boost distribution build guidance to determine the supported process after cloning. Document the steps in README.md or link to a maintained Wiki page, with enough detail for a user to build the latest program_options version independently.

索引モデルが issue の本文から書いたものです。