You are not supposed to invoke configure.ac
'./configure && make && sudo make install' should suffice to build and install
pidgin-musictracker
If you are not quite sure what you are doing, you are probably better off
installing pidgin-musictracker using synaptic or downloading it from
https://launchpad.net/ubuntu/karmic/+source/pidgin-musictracker.
> Does this mean there's a problem with the script? I also downloaded
> another package containing only a musictracker.so file. If I used this
> instead how would I do it?
http://code.google.com/p/pidgin-musictracker/wiki/FAQ#11 should explain what
to do with the plugins .so file.