Squid on Fedora
Pre-Built Binary Packages
http://download.fedoraproject.org/pub/fedora/linux/
Binary RPMs for Fedora are available via the Fedora download/update servers for all active Fedora versions like most other free software.
Package information: https://admin.fedoraproject.org/pkgdb/acls/name/squid
Bug Reports: https://admin.fedoraproject.org/pkgdb/acls/bugs/squid
Squid-3.1
Install Procedure:
yum install squid
Compiling
Rebuilding the binary rpm is most easily done by checking out the package definition from cvs
cvs -d :pserver:anonymous@cvs.fedoraproject.org:/cvs/pkgs/ co squid
then do a "make local" in the version you want to recompile.