Hello.
Few comments about CMake project.
Nikolaus, you replaced PROJECT_VERSION with project(freetype VERSION ...) but this syntax requires cmake >= 3.0, so you need to bump cmake_minimum_required() statement.
Also there in CMakeList.txt typo around in line 430 (excess curly bracket on end):
set(CPACK_PACKAGE_VERSION_PATCH ${VERSION_PATCH}})
About version mismatch in library name. This is platform-specific shared object version number, and it's based on libtool version (currently 22.0.16, version_info macros, not package version which is currently 2.9.x). But exact version naming still unclear to me.