I'm wondering why share client in Linux (libmongoclient.so) doesn't have a soname version number (at least Fedora doesn't provide it in v2.2, please, correct me if it is only a configuration option or it is there in newer version).

Does it mean that this client library doesn't bother with compatibility or the API/ABI is static?

If there is no strong reason to provide non-versioned shared library, I'd like to propose adding a soname version, at least as a non-default configure option. It is necessary to keep libraries compatible.