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diff of multiple files between old versions

From: Steve deRosier
Subject: diff of multiple files between old versions
Date: Wed, 17 Sep 2003 10:37:35 -0700
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3.1) Gecko/20030428

I'm trying to narrow down a problem in Alsa so I can debug and fix it. I've got a very old version that works, and current CVS versions with a bug. Since I got no help on the Alsa list, I'm taking the hard aproach--by grabbing CVS snapshots on various dates I'm trying to narrow down to the date the bug was introduced. If I can do that, I should be able to diff/log the last version that worked with the first version that is broken and figure out where to fix it.

The question is this: How do I figure out what changed between two specific times?

What I'm currently doing is checking out dated versions in different directories and compiling and testing:
mkdir cvs011503
cd cvs011503
cvs -z3 co -P -D 2003-01-15 .

So, when I know the two dates that I need to know, how do I find out what changed between them (keep in mind that I don't want to do a cvs diff on each and every file by hand, the directory structure the cvs gives me is large and convoluted)?

- Steve

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