Tried to compile calligra on ML with XCODE 4.5.1 and prerequisites are mostly found. Not all, but most of them. Cmake offer a build, which I didn't start yet because of missing value for QT_QT_INCLUDE_DIR. QT is installed.
Do somebody know which path calligra expect?

Can you please post the full CMake log and any other build related messages you are seeing?
Please use a pastebin such as paste.kde.org, or [code] tags when doing so.