@thamha, we do not support using LiteCore directly, for reasons like this. It hasn’t been a priority to set it up as a project that other people can use, and the APIs and functionality can change. It’s an internal component of Couchbase Lite.
We announced Couchbase Lite For C a few months ago, which is a thin wrapper around LiteCore with a C and C++ API. This will be a supported product when it reaches 1.0, and we’re informally supporting it until then so developers can help us test and improve it.