If your library comes with source code, than you should be fine, as long as you could get things compiled under scratchbox ARMEL target.

However, the complexity is growing with your library dependency. The more extra libraries it links to, the more work you have to do.

I used default repos in scratchbox (with Nokia closed binary). There are some extra repos such as Qt4 Maemo. I am not sure there is a list of them yet.

Basically if there is anything I want to use, I would use apt-cache first, then google it. The last thing I would do is compile the source code. Usually it solves most of the cases.

Hope it helps.

Edit:

There are some cases that even you passed compile, your binary may still cause segmentation fault. To be 100% sure, you could use Nokia RDA at this moment.