Installing Term::ReadLine::Gnu on OS X, the easy way If you try to install Term::ReadLine::Gnu on Mac OS X, you will ordinarily run into this unpleasantry from the Makefile.PL (which will likely end up in such as ~/.cpanm/build.log): The libreadline you are using is the libedit library. Use the GNU Readline Library. Here I will assume that you are using Homebrew and have installed GNU Readline: br