pcc daily source tarball snapshots are available via ftp from pcc.ludd.ltu.se where pcc-current.tgz has a daily checked out source tree. Also available via HTTP.
The tree can also be reached via cvs pserver; "cvs -d :pserver:email@example.com:/cvsroot co pcc" would check out the source tree.
The source code can also be browsed via fisheye which is a part of the bug tracking system.
pcc is available in OpenBSD CVS at src/usr.bin/pcc/.
pcc is available in NetBSD CVS at src/external/bsd/pcc/ with
reachover Makefiles at src/usr.bin/pcc/.
pcc is available for pkgsrc at pkgsrc/lang/pcc/. And see at pkgsrc.se.
pcc is available in FreeBSD ports at ports/lang/pcc/. Also see at FreshPorts.
pcc is available in the standard Fedora repository and can be installed with "#yum -y install pcc".