Quote Originally Posted by ComaWhite View Post
Well they can use the -prefix <dir> to install to a specific folder after copying the mkspecs to that folder.
The problem is the switch doesn't exist on Windows anymore. You can only have an in-place install there. And besides, this doesn't really reduce the space requirement for building Qt, it only moves it elsewhere. "(n)make clean" will remove all intermediate files, so that is enough, one doesn't have to do any other tricks. But QtWebKit still requires a few gigabytes to build, especially if you build in both debug and release modes at once.