Can an IL2CPP android build include static libraries?

Our project is facing issues of this kind:

However, while not having access to the source code of the 3rd-party lib which we wish to use, we do have a static version of it.

It appears that .so files inside Plugin/Android are magically copied to the appropriate place in the final apk, but dropping a .a file there does not mean it is included in the link command generating

Is there, by any chance, a way to let Unity know about static libraries to be linked against?

We don’t support static libraries, at least at the moment.

Your bug with “dll not found” was fixed, and is planned to get into 5.2 patch release as well.