This morning I was trying to install Gnuplot from source because I wanted generate some graphs for ApacheBench. I’m currently benchmarking one of our Rails applications using Nginx w/ Mongrels against Phusion Passenger (Nginx flavor). When “make”ing Gnuplot I received the following error:

Undefined symbols:
“_rl_ding”, referenced from:
_alert in [...]

I’m posting way too much about SVN these days, but these are mainly for my personal recollection. Hopefully you’ll find them useful too. Here’s the scenario: you’re working on a branch and you want to merge a single commit from trunk into the branch. The first thing you need to do is find the revision [...]