splint large project (hundreds of files)

I'm using splint for a moderately large project. All is fine, but we are now trying to up the level from "weak" to "checks". Because we are checking files one by one splint complains about undefined functions. I seem to remember splint had the option to analyse multiple files individually and then do a final analysis of all together (compile + link style).

I don't find any info on how to do this in the manual nor general Googling.

Is this possible?

Thanks,