If you have GDBM available and want it instead of NDBM, say -DHAS_GDBM.
C's that don't try to restore registers on longjmp() may need -DJMPCLOBBER.
(Try this if you get random glitches.)
+ If you get duplicates upon linking for malloc et al, say -DHIDEMYMALLOC.
+ Turn on support for 64-bit integers (long longs) with -DQUAD.
5) make test