default dbm type?

["Paul Reilly" <pareilly@xxxxxx>]

I'm using Apache 2.2.10 with AuthDBM 
How can I specify the 'default'  dbm type chosen during compile?
For example, during the configure it finds Berkeley DB 4.2,
but then sets the default to SDBM, which uses .dir and .pag files.

checking for db4/db.h... yes
checking for -ldb-4.2... yes
checking for Berkeley DB... found db4
checking for default DBM... sdbm (default)
  setting APRUTIL_EXPORT_LIBS to "-ldb-4.2"
  setting APRUTIL_LIBS to "-ldb-4.2"
checking for pg_config... no

How do I specify in the build, the default DBM type I want?

-- 
Paul Reilly
Trinity College Dublin
e: paul.reilly@xxxxxx
p: +353-1-896-2152