qmake is the build tool that comes with Qt. You can download the complete Qt toolkit at the address http://qt-project.org/, but it is certainly available as a package with your Linux distribution.
You can install cpik in a non-standard directory using the command
qmake PREFIX=<abs-dir> -o Makefile cpik<VERSION>.pro
where <abs-dir> is an absolute path to the directory where you plan to install cpik. Note that cpik will not work if you use a relative path.
This option is provided for very special situations, and my advice is to avoid it when it is not absolutely needed.