m4_comment([$Id: compatible.so,v 10.34 2002/02/23 20:05:24 bostic Exp $])

m4_ref_title(Programmer Notes,
    Compatibility with historic UNIX interfaces,
    @interface compatibility, program/copy, program/runtime)

m4_p([dnl
The m4_db version 2 library provides backward-compatible interfaces for
the historic UNIX m4_ref(dbm), m4_ref(ndbm), and m4_ref(hsearch)
interfaces.  It also provides a backward-compatible interface for the
historic m4_db 1.85 release.])

m4_p([dnl
m4_db version 2 does not provide database compatibility for any of the
previous interfaces, and existing databases must be converted manually.
To convert existing databases from the m4_db 1.85 format to the m4_db
version 2 format, review the m4_ref(db_dump185) and m4_ref(db_load)
information.  No utilities are provided to convert UNIX m4_ref(dbm),
m4_ref(ndbm), or m4_ref(hsearch) databases.])

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