If you're running into the readline compile problem on ubuntu 14.04, this is one fix: https://gist.github.com/mislav/a18b9d7f0dc5b9efc162 Download the readline.patch file from this gist (click on "raw" and download that link). Go into your ruby-2.1.1 dir. Type this: patch -p0 <path/to/the/readline.patch I had to delete the last hunk from the patch file for it to work. (The last hunk is only comments.)
on 2014-04-20 21:01
on 2014-04-23 14:28
Joel, thanks for information. I ran into this problem, but the patch command didn't work, seemed to loop, even after deleting the last hunk. I had to edit manually the readline.c and extconf.rb file like the patch should have do it and then I was able to build ruby 2.1.1. Regards, Michel.