The proftpd-1.3.1 ebuild contains the following: if use mysql && use postgres ; then ewarn "ProFTPD only supports either the MySQL or PostgreSQL modules." ewarn "Presently this ebuild defaults to mysql. If you would like to" ewarn "change the default behaviour, merge ProFTPD with:" ewarn "USE='-mysql postgres' emerge proftpd" epause 5 fi To my knowledge, using USE on the commandline is considered bad practice (because it's not remembered). In my opinion the last line of the ewarn message should be changed to something like: echo 'net-ftp/proftpd -mysql postgres' >> /etc/portage/package.use emerge -avN proftpd
Actually, what's "bad" is the restriction. From proftpd module doc: "In 1.3.0rc1, the mod_sql module gained the ability to be compiled with multiple backend modules supported, e.g. to have both mod_sql_mysql and mod_sql_postgres usable in the same proftpd daemon." so it's actually ok to compile for both servers and you then set specific to each container which backend to use.
Fixed in 1.3.2-r1 (which does allow both backends), thanks for the report
