We are installing readline on ubuntu 12.04 for ruby 1.9.3. Some files are missing when running extconf:
$ ruby extconf.rb -- --with-readline-dir="$HOME/.rvm/usr"
checking for tgetnum() in -lncurses... yes
checking for readline/readline.h... yes
checking for readline/history.h... yes
checking for readline() in -lreadline... no
checking for readline() in -ledit... no
checking for editline/readline.h... no
How do we install the last 3 files missed before running make install? Thanks so much.