Generating Difference Reports of directories

[pmatos]

Hi all,

I'm trying to generate a difference report in Emacs between two
directories. In dired I marked one directory with = and then it asked
me for the other dir path which I inserted. I only got a list of the
files which are different. I also want to know in which lines they
differ, I need all the info I can get. How can I do this under Emacs?

Cheers,

Paulo Matos