I will fix it also upstream. Would you mind a PR over there, so that I can merge it faster?

@cenit Is the upstream you mentioned darknet?

yes, github.com/alexeyab/darknet

I'm not sure if these changes should be applied to upstream, since it involves using the getopt provided by vcpkg, and we have no right to require upstrem to use the port installed via vcpkg.

I'm not sure if these changes should be applied to upstream, since it involves using the getopt provided by vcpkg, and we have no right to require upstrem to use the port installed via vcpkg.

Upstream probably needs to mangle the symbols so that they are not conflicting with others.

I am one of the only two people with write access to upstream repo :D
We are very well integrated with vcpkg, but of course the PR should be managed so that people not using it can still have a working copy.
If it's too much hassle for you, I'll do it sooner or later, so that the patch here will become redundant

IMO getopt simply doesn't belong into the library. It needs to be separate, linked to or compiled into executables.
I didn't even find usage of it, but I didn't search too much.