fontforge/fontforge — pull request #1406 by JoesCat (2014-06-11 04:41:50+00:00)
Title: Come to a hard-stop if user wants libreadline, but it's not available.

Default is to check and include, or not include if not available, but
if user option is "--with-libreadline" then the library and header files
must be available, otherwise ./configure comes to a hard-stop.