See [ Add <limits> include to cxxopts.hpp #427 ](https://github.com/jarro2783/cxxopts/pull/427) It turns out that [cxxopts @ 287d1e3](https://github.com/jarro2783/cxxopts/tree/287d1e39e0c9e804e5b23809e3b77ef119d3f830) is to old! Update to [cxxopts @ c39022e](https://github.com/jarro2783/cxxopts/tree/c39022e04774a93996bff0682481048f682374a0)! Edit: I do not know how to change a sub project (that is why i do not created a pull request)