Want to use dbmopen() to open an NDBM DB under solaris? Want to have GDBM support as well? Tough; you can't. You *can* use dba_open(), but you need to jump through a couple of hoops first:
First, you need to re-roll libgdbm so that DBM/NDBM compatiblity are removed. For GDBM-1.7.3, change this line in the Makefile:
OBJS = $(DBM_OF) $(NDBM_OF) $(GDBM_OF)
to this:
OBJS = $(GDBM_OF)
Once that's installed, re-run ./configure --with-gdbm=/<prefix> --with-ndbm --with-db=/<prefix> <other args>, where <prefix> is the directory which holds the include/ directory containing the associated header files. make, make install, adjust your scripts to use dba_open() with the ndbm handler. Voila!