in newer ncurses releases (v6 and upward) libtinfo is now a separate lib from libncurses. There is now little to gain by defaulting the USE flag to off.

As a first step, ncurses will auto-enable the "tinfo" USE flag.

After that, investigate and clean up packages that make mention of "tinfo" USE flag or tinfo library:

• app-admin/ccze
• app-admin/dio
• app-admin/logmon
• app-admin/puppet-agent
• app-admin/whowatch

• app-benchmarks/spew
• app-crypt/heimdal
• app-crypt/mit-krb5-appl
• app-editors/hexcurse
• app-editors/hexedit
• app-editors/hteditor
• app-editors/joe
• app-editors/moe
• app-editors/ne
• app-editors/shed
• app-editors/xemacs
• app-emulation/distrobuilder
• app-emulation/docker-slim
• app-i18n/canna
• app-i18n/uim
• app-misc/abook
• app-misc/cdargs
• app-misc/cmatrix
• app-misc/delay
• app-misc/lcd4linux
• app-misc/vcp
• app-office/calcurse
• app-shells/tcsh
• app-shells/zsh
• app-text/lv
• app-text/pinfo
• dev-embedded/arduino-bin
• dev-embedded/sunxi-tools
• dev-java/netbeans-java
• dev-lang/ocaml
• dev-libs/klibc
• dev-libs/libcecdev-libs/libedit
• dev-libs/libgnt
• dev-lisp/clisp
• dev-python/PyQt5
• dev-python/PyQtWebEngine
• dev-python/qscintilla-python
• dev-scheme/guile
• dev-tcltk/tclreadline
• dev-texlive/texlive-latexextra
• dev-texlive/texlive-xetex
• dev-util/act
• dev-util/android-ndk
• dev-util/android-studio
• dev-util/ddd
• dev-util/global
• dev-util/lldb
• dev-util/min-cscope
• dev-util/nvidia-cuda-toolkit
• dev-util/vbindiff
• games-action/bzflag
• games-board/ccgo
• games-engines/frobtads
• games-misc/bsd-games
• games-roguelike/angband
• games-roguelike/moria
• games-roguelike/zangband
• mail-client/bower
• mail-client/etpan-ng
• media-gfx/blender-bin
• media-libs/aalib
• media-sound/lame
• net-analyzer/argus-clients
• net-analyzer/bwmon
• net-analyzer/cbm
• net-analyzer/hydra
• net-analyzer/ifstatus
• net-analyzer/jnettop
• net-analyzer/mtr
• net-analyzer/nbwmon
• net-analyzer/net-snmp
• net-analyzer/netwatch
• net-analyzer/nload
• net-analyzer/nstats
• net-analyzer/pinger
• net-analyzer/pktstat
• net-analyzer/sinfo
• net-analyzer/slurm
• net-analyzer/sngrep
• net-analyzer/sniffit
• net-analyzer/tcptrack
• net-analyzer/traceproto
• net-analyzer/trafshow
• net-analyzer/yersinia
• net-dns/pdns-ldap-backend
• net-im/vacuum
• net-irc/xaric
• net-libs/libtrace
• net-mail/metamail
• net-mail/pfqueue
• net-misc/olsrd
• net-misc/shmux
• net-misc/suite3270
• net-misc/zssh
• net-nds/ldapvi
• net-p2p/ncdc
• net-p2p/rtorrent
• net-p2p/torrentinfo
• net-vpn/tinc
• net-wireless/horst
• net-wireless/spectools
• net-wireless/uhd
• net-wireless/wavemon
• sci-calculators/orpie
• sci-electronics/spice
• sys-apps/duc
• sys-apps/ethq
• sys-apps/qingy
• sys-apps/tomoyo-tools
• sys-apps/util-linux
• sys-cluster/ceph
• sys-cluster/wulfware
• sys-devel/gdb
• sys-fs/iprutils
• sys-libs/libstatgrab
• sys-libs/ncurses
• sys-libs/ncurses-compat
• sys-libs/openipmi
• sys-libs/readline
• sys-power/powertop
• sys-process/ftop
• sys-process/tiptop
• www-client/netrik
• www-client/w3mmee
• www-servers/caddy
• x11-libs/libyui-ncurses
• x11-misc/xrestop
• x11-terms/xterm