Emerge failure: dev-lisp/clisp-2.49-r8

dev-lisp/clisp-2.49-r8 fails to emerge with sys-libs/ncurses[tinfo] (required for CUDA), complaining that it does not find tgetent: configure: ** checks for libraries checking for library containing tgetent… no configure: error: in `/var/tmp/portage/dev-lisp/clisp-2.49-r8/work/clisp-2.49/builddir’: configure: error: despite –with-readline, GNU readline was not found (try –with-libreadline-prefix) See `config.log’ for more details. * ERROR: dev-lisp/clisp-2.49-r8::gentoo failed (configure phase): * ./configure […]