> Are there any packages that do this? In order to fully build gnu-crypto > successfully, I will need to be able to have a seperate build directory > than the source directory. I have been having trouble setting this up > properly in debian/rules however, and I was wondering if there were > any packages that do this that I could use as an example.
Have a look at - for example - `thy'. That does this in a quite easy way. If gnu-crypto is using autoconf+automake, or something similar, doing this is rather trivial, methinks.