> > The problem was that in some source the ndbm.h was included 2 times,
> > one directly in .c, and one other in a .h included in .c. I think that
> > simply the newer gcc has became more strict... ;)))
> This is more of a bug in your ndbm.h...
> Generally, in ifmail I assume that it is legal to #include .h files
> more than once. This is maybe not so good, but the problem (if it is
> a problem) is definitely not limited to ndbm.h.
To my mind the simpliest decision is to compile ifmail without ndbm.h. I
did so and all is working fine. May be, I will have some problems in