I want to compile an open-source project called tclspice (an electronic circuit simulator). I downloaded the "source" file, opened a Terminal window in its folder and typed "./configure". Result: Many lines of text reporting progress in finding stuff, mostly OK, until: Checking for readline: checking for readline/readline.h... no configure: error: Couldn't find GNU readline headers. After this, I found another open-source project called readline4-4.2a which seems to be what the above notification says I'm missing. Should I configure, make and make install this readline package first? I know how to compile programs with CodeWarrior or Xcode, but I don't understand much about these unix packages. I'm using Panther. Thanks, Jerry Krinock San Jose, CA USA