[augusto-moura]

Solved problem is a strong statement. I've never heard of Hunter before. And as far as I can remember the most popular way of solving this is having a list of dependencies in a README somewhere so you can install them and their headers with your os/distro package manager

[geokon]

That's not a serious solution. You don't control dependency versions if you use a package manager and you can't build full static builds or full debug builds etc. Some targets don't have package managers (ex an embedded device)

[augusto-moura]

It is not, but it is the standard. So I would this is _not_ a solved problem