trying to create patches

[Joseph C. Lininger]

Hi all,
Seeing in how I write code and stuff I should probably know this, but I
don't. How do I use diff to create patches? The ones I have managed to
create don't install properly. Something about "can't find file to patch at
line <xxx>". I'm obviously overlooking something, but I can't tell what it
might be. Any idea?
--
Joseph C. Lininger
jbahm at pcdesk.net