--prefix=/opt/gnome: Install Evolution in the Gnome 1.4 area. --with-db3=/tmp/db-3.1: db-&db-3.1-version; must be installed prior to building Evolution, but should not overwrite an existing installation of the Berkely Database. Installing db-&db-3.1-version; in a temporary directory is all that is needed for Evolution to link to the static db-&db-3.1-version; libraries.