I found the only one simillar question but that's for linux and xcode only...
http://stackoverflow.com/questions/854675/is-it-possible-to-set-up-a-linux-box-with-distcc-to-build-my-xcode-projects
im really interested to use OSX GCC for OPENBSD BOX. because my server is really slow, and all I need is file sharing and printing at home. I like to use ports very much, especially rebuilding all packages for slow cpu, it's really noticable difference, anyway, IMHO, is it possible?