• Read CMakeLists.txt to find the right variables to change.
• Enable/Disable importers with ASSIMP_BUILD_XXX_IMPORTER option
• To link to the files in INSTALL directory should be the most convenient. To change the default install directory, use -DCMAKE_INSTALL_PREFIX="".
• The install command by default requires not only ASSIMP project to be build, but also the Viewer app, which causes some erroron Windows using MinGW toolchain. I had to disable building it with -DASSIMP_BUILD_ASSIMP_TOOLS=OFF.