app-admin/vlogger:dbi - Enable support for DBI
app-backup/fsarchiver:lzma - Enables LZMA compression
app-emulation/xenman:lvm2 - Enable lvm2 support
-app-forensics/ovaldi:rpm - Enable the RPM probes
app-misc/2gis:data - Use maps and other data from app-misc/2gis-data
app-misc/2gis-data:astr - The map of Astrakhan for app-misc/2gis
app-misc/2gis-data:barn - The map of Barnaul for app-misc/2gis
dev-cpp/libvmime:sendmail - Support for mail-mta/sendmail as a mail transport agent
dev-cpp/libvmime:smtp - Enable support for the SMTP protocol
dev-db/dabo:ide - Enable dabo IDE
-dev-db/spatialite:geos - Add the sci-libs/geos library for exact topological tests
-dev-db/spatialite:proj - Add the sci-libs/proj library for reprojection features
dev-games/opal:double-precision - More precise calculations at the expense of speed
dev-games/renpy:development - Install IDE for game developers and an empty game template
dev-lang/brainwash:char - Compile with support for unsigned character (instead of signed integer) cells
net-zope/imagerepository:kupu - Pulls in kupu as a dependency
sci-chemistry/hoomd:cuda - Enables support for the NVIDIA CUDA library. Requires single-precision flag be set.
sci-chemistry/hoomd:single-precision - Computations will be performed using single precision numbers. Otherwise computations will be performed in double precision.
-sci-geosciences/opencpn:gpsd - Add support for using a GPS device through the GPSD deamon
sci-misc/ised:long-types - Use 'long long' and 'long double' instead of 'int' and 'double' data types
sci-visualization/tulip:stats - Build with graph stats
sci-visualization/tulip:tlprender - Build tlprender