Hello, I'd like to add the following function to eutils.eclass : # Generate a standard error message for missing USE flags # in existing packages, and die. # # Usage: built_with_use_die [] # ex: built_with_use_die dev-util/subversion python # or: built_with_use_die net-www/apache LDAP ldap # # Typical usage: # if ! built_with_use dev-util/subversion python ; then # built_with_use_die dev-util/subversion python # fi # # Note: when is not specified, is used for the USE flag name. built_with_use_die() { local package=$1 local func=$2 local use_flag=$3 [[ -z ${use_flag} ]] && use_flag=${func} eerror "Your ${package} package has been built without" eerror "${func} support, please enable the '${use_flag}' USE flag and" eerror "re-emerge ${package}." elog "You can enable this USE flag either globally in /etc/make.conf," elog "or just for specific packages in /etc/portage/package.use." die "${package} missing ${func} support" } This function is already used in latest www-apps/trac ebuilds. The following packages might be concerned, i.e. packages that are currently using built_with_use() : app-admin/system-config-httpd app-admin/kedpm app-admin/sabayon app-admin/analog app-admin/diradm app-admin/moodss app-admin/puppet app-admin/keepassx app-admin/webalizer app-backup/bobs app-cdr/k3b app-cdr/dvdshrink app-crypt/xca app-crypt/gnupg app-doc/kchmviewer app-editors/joe app-editors/gobby app-emacs/emacs-w3m app-emulation/wine app-emulation/crossover-office-bin app-emulation/crossover-office-pro-bin app-emulation/xen-tools app-i18n/uim app-i18n/scim-bridge app-i18n/scim-qtimm app-misc/g15composer app-misc/beagle app-misc/gramps app-misc/tracker app-misc/tomboy app-misc/webcomics-collector app-office/krita app-office/koffice app-office/kmymoney2 app-office/tinyerp-server app-office/gnucash app-office/mozilla-sunbird app-office/gnumeric app-office/qbankmanager app-pda/libsyncml app-pda/libopensync-plugin-syncml app-pda/libopensync-plugin-irmc app-portage/elogv app-portage/esearch app-portage/porthole app-portage/layman app-text/an app-text/xdvik app-text/bibletime app-text/biblestudy app-text/evince app-text/enscript app-text/epdfview app-text/gnome-doc-utils dev-cpp/Ice dev-cpp/libthrowable dev-db/pgadmin3 dev-dotnet/galago-sharp dev-games/ogre dev-haskell/wxhaskell dev-java/cairo-java dev-java/velocity dev-lang/lazarus dev-lang/mercury-extras dev-libs/g-wrap dev-libs/m17n-lib dev-lisp/sbcl dev-ml/findlib dev-ml/lablgl dev-ml/ocamlnet dev-php4/php-java-bridge dev-php5/pecl-pdo-odbc dev-php5/pecl-pdo-oci dev-php5/php-qt dev-php5/pecl-pdo-sqlite dev-php5/pecl-pdo dev-php5/pecl-pdo-dblib dev-php5/pecl-pdo-mysql dev-php5/pecl-pdo-pgsql dev-python/pymssql dev-python/pyzor dev-python/soappy dev-python/pyopengl dev-python/imaging dev-python/wxpython dev-python/xapwrap dev-python/telepathy-python dev-ruby/ruby-gd dev-ruby/sqlite3-ruby dev-tcltk/thread dev-tinyos/tos-getenv dev-tinyos/tos-scripts dev-util/meld dev-util/pida dev-util/source-highlight dev-util/documancer dev-util/dialog dev-util/rapidsvn dev-util/imediff2 dev-util/svnmailer games-action/rrootage games-action/powermanga games-action/noiz2sa games-arcade/frozen-bubble games-arcade/supertux games-arcade/pycadia games-arcade/solarwolf games-arcade/defendguin games-arcade/project-starfighter games-arcade/stepmania games-arcade/smclone games-arcade/tomatoes games-arcade/monster-masher games-arcade/ceferino games-emulation/dosbox-cvs games-emulation/dosbox games-fps/qudos games-fps/quake3-bin games-fps/duke3d games-fps/quake1-data games-fps/quake2-data games-fps/quake2-icculus games-fps/doom3-dungeon games-kids/cubetest games-mud/lyntin games-puzzle/xye games-puzzle/twindistress games-puzzle/flobopuyo games-puzzle/monsterz games-rpg/nwn games-rpg/tmw games-rpg/xu4 games-rpg/nwn-cep games-simulation/gl117 games-simulation/openttd games-simulation/lincity-ng games-simulation/planets games-sports/ultimatestunts games-strategy/freelords games-strategy/wesnoth gnome-extra/evolution-data-server gnome-extra/hal-device-manager gnome-extra/gnome-games gnome-extra/evolution-exchange kde-base/kpdf kde-base/kdebase kde-base/kdelibs kde-base/kdegraphics kde-base/kopete kde-base/kghostview kde-base/kdemultimedia-arts kde-base/kdenetwork kde-base/kdebase-kioslaves kde-misc/tork kde-misc/kompose kde-misc/kdnssd-avahi mail-client/mozilla-thunderbird mail-client/evolution media-fonts/acroread-asianfonts media-gfx/splashutils media-gfx/gimp media-gfx/pstoedit media-gfx/gimp-print media-gfx/hugin media-gfx/graphviz media-gfx/asymptote media-gfx/f-spot media-gfx/kphotoalbum media-libs/mesa media-libs/libipoddevice media-libs/giblib media-libs/libquicktime media-libs/openinventor media-libs/openexr media-libs/ploticus media-plugins/vdr-softdevice media-plugins/kipi-plugins media-plugins/quodlibet-trayicon media-plugins/vdr-weatherng media-plugins/mytharchive media-plugins/slimserver-alienbbc media-plugins/quodlibet-ipod media-sound/cmus media-sound/audacity media-sound/quodlibet media-sound/timidity++ media-sound/beast media-sound/ncmpc media-sound/pympd media-sound/mt-daapd media-sound/lastfmplayer media-sound/exaile media-sound/vorbis-tools media-sound/listen media-sound/mumble media-sound/murmur media-sound/sonata media-sound/banshee media-sound/alsa-tools media-sound/prokyon3 media-sound/alsa-utils media-sound/pulseaudio media-sound/slimserver media-sound/padevchooser media-tv/nuvexport media-tv/freevo media-tv/mythtv media-video/mplayer-resume media-video/ffmpeg2theora media-video/kaffeine media-video/cpdvd media-video/oxine media-video/totem media-video/tovid media-video/winki media-video/avidemux media-video/thoggen media-video/recordmydesktop media-video/dvbcut media-video/dvdrip media-video/mpeg4ip media-video/kdenlive media-video/ogmrip media-video/ati-gatos media-video/videotrans net-analyzer/base net-analyzer/ntop net-analyzer/sarg net-analyzer/cacti net-analyzer/munin net-analyzer/sguil-client net-analyzer/aimsniff net-analyzer/smokeping net-analyzer/sguil-sensor net-analyzer/sguil-server net-analyzer/jffnms net-analyzer/iptraf net-analyzer/prewikka net-analyzer/wireshark net-dialup/speedtouch-usb net-dialup/ueagle-atm net-dns/avahi net-firewall/firehol net-firewall/shorewall net-im/psi net-im/sim net-im/ekg2 net-im/gaim net-im/ekiga net-im/gajim net-im/tkabber net-im/ejabberd net-im/tapiocaui net-irc/epic4 net-irc/unrealircd net-irc/inspircd net-libs/rb_libtorrent net-mail/vimap net-mail/cyrus-imapd net-mail/popa3d net-mail/uw-imap net-mail/vm-pop3d net-mail/mailgraph net-misc/ser net-misc/neon net-misc/vino net-misc/xrdp net-misc/sobby net-misc/scponly net-misc/asterisk-app_icd net-misc/sitecopy net-misc/asterisk-addons net-misc/openntpd net-misc/vidalia net-misc/openvpn net-misc/hylafax net-misc/asterisk net-nds/openldap net-news/snownews net-nntp/tin net-nntp/slrn net-p2p/amule net-p2p/deluge net-p2p/museek+ net-p2p/bittorrent net-p2p/mldonkey net-p2p/qbittorrent net-print/cups net-voip/cohoba net-wireless/wpa_supplicant net-www/apache rox-extra/musicbox sci-biology/clustalx sci-biology/treeviewx sci-chemistry/apbs sci-chemistry/maid sci-chemistry/molmol sci-electronics/pcb sci-electronics/geda sci-electronics/kicad sci-geosciences/grass sci-libs/gdal sci-libs/hdf5 sci-libs/scipy sci-libs/libgeda sci-mathematics/maxima sci-visualization/hippodraw sys-apps/hal sys-apps/yum sys-apps/qingy sys-cluster/mpich2 sys-devel/autogen sys-freebsd/freebsd-rescue sys-fs/loop-aes sys-libs/uclibc sys-power/powersave sys-power/kpowersave virtual/perl-DB_File www-apache/anyterm www-apache/mod_vhost_ldap www-apps/trac www-apps/bugzilla www-apps/viewvc www-apps/viewcvs www-client/lynx www-client/elinks www-client/mozilla-firefox www-servers/aolserver x11-apps/xdm x11-apps/xfd x11-apps/xgc x11-apps/xmh x11-apps/xsm x11-apps/xmag x11-apps/xman x11-apps/xvidtune x11-apps/xphelloworld x11-apps/xcalc x11-apps/xedit x11-apps/xload x11-apps/editres x11-apps/xclipboard x11-apps/listres x11-apps/xkbutils x11-apps/xconsole x11-apps/bitmap x11-apps/xditview x11-apps/xmessage x11-apps/xclock x11-apps/viewres x11-apps/xfontsel x11-base/xorg-server x11-drivers/nvidia-drivers x11-drivers/xf86-video-savage x11-drivers/xf86-video-sunffb x11-drivers/nvidia-legacy-drivers x11-drivers/xf86-video-i810 x11-drivers/xf86-video-tdfx x11-drivers/xf86-video-ati x11-drivers/xf86-video-mga x11-drivers/xf86-video-sis x11-drivers/xf86-video-via x11-drivers/xf86-video-glint x11-libs/gtk+ x11-libs/pango x11-libs/goffice x11-misc/idesk x11-misc/rss-glx x11-misc/fraqtive x11-misc/alacarte x11-misc/xbindkeys x11-misc/service-discovery-applet x11-plugins/wmhdplop x11-plugins/beryl-plugins x11-plugins/gkrelltop x11-themes/tango-icon-theme-extras x11-themes/tangerine-icon-theme x11-themes/tango-icon-theme x11-wm/kahakai x11-wm/stumpwm-cvs x11-wm/beryl x11-wm/enlightenment x11-wm/fluxbox xfce-extra/thunar-volman And eclasses : confutils.eclass depend.php.eclass games.eclass games-mods.eclass gkrellm-plugin.eclass horde.eclass java-utils-2 kde.eclass mysql.eclass subversion.eclass phpconfutils.eclass php-common-r1.eclass php5-sapi*.eclass toolchain.eclass x-modular.eclass Any thoughts? Thanks, -- Julien Allanos (dju`)