GNU readline MacPorts Python, configure script. python script Python (Mac/BuildScript/build-installer.py). GNU readline 10.4 .
, OS X /usr/lib/libreadline.dylib libedit; AFAIK, Apple GNU readline OS X:
$ ls -l /usr/lib/libreadline.dylib
lrwxr-xr-x 1 root wheel 15 Sep 5 2009 /usr/lib/libreadline.dylib@ -> libedit.2.dylib