Berkeley DB

Debian (potato)
 +-----------++------------------++----------------------+
 |           ||   +libc6-dev     ||     +libdb2-dev      |
 +-----------++----------+-------++--------------+-------+
 |           || include  |  lib  || include      |  lib  |
 +-----------++----------+-------++--------------+-------+
 | 1.8x      || db1/db.h | -ldb1 ||     ***      |  ***  | 1.85.4
 +-----------++----------+-------++--------------+-------+
 | compat185 || db_185.h | -ldb  || db2/db_185.h | -ldb2 |
 | 2.x       || db.h     | -ldb  || db2/db.h     | -ldb2 | 2.4.14? || 2.7.7
 +-----------++----------+-------++--------------+-------+

FreeBSD
 +-----------++------------------++----------------------+
 |           ||      vanilla     ||    +databases/db     |
 +-----------++---------+--------++--------------+-------+
 |           || include |  lib   ||   include    |  lib  |
 +-----------++---------+--------++--------------+-------+
 | 1.8x      ||  db.h   |  (std) ||    ***       |  ***  | 1.85
 +-----------++---------+--------++--------------+-------+
 | compat185 ||   ***   |  ***   || db2/db_185.h | -ldb2 |
 | 2.x       ||   ***   |  ***   || db2/db.h     | -ldb2 | 2.7.7
 +-----------++---------+--------++--------------+-------+

Solaris, AIX
 +-----------++---------+--------+
 |           || include |  lib   |
 +-----------++---------+--------+
 | 1.8x      ||   ***   |  ***   |
 +-----------++---------+--------+
 | compat185 ||   ***   |  ***   |
 | 2.x       ||   ***   |  ***   |
 +-----------++---------+--------+

OSF1
 +-----------++---------+--------+
 |           || include |  lib   |
 +-----------++---------+--------+
 | 1.8x      ||  db.h   |  -ldb  | 1.85?
 +-----------++---------+--------+
 | compat185 ||   ***   |  ***   |
 | 2.x       ||   ***   |  ***   |
 +-----------++---------+--------+