Help with CVS (Was: Conditionals in CVS Automake)

[Akim Demaille]

Could someone teach me how to go backward with CVS and pull out
revision n-1?  I'm quite lost with this issue, and I'd like to use CVS
to have at least an idea of _when_ it started to fail.  I know how to
do that with PRCS, but have no idea about CVS.

Thanks!