1 debugging
command-line switch (?§15.7.1 on page 542) to determine whether NETINFO support is
included (if it appears in the list, support is included).
Table 3-10. Define for network support
Define Description
NETINET A TCP/IP-based network (IPv4)
NETINET6 An IPv6-based network
NETISO An ISO 8022 network
NETNS A Xerox NS protocol network (tentative)
NETUNIX A Unix domain network
NETX25 A CCITTNa X.25 network (tentative)
a International Telephone Consultative Committee.
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128 | Chapter 3: Tune sendmail with Compile-Time Macros
3.4.34 NEWDB
Support Berkeley db(3) databases Tune with confMAPDEF
The db(3) form of database uses a single file and can be shared by different architectures. If
you intend to support aliasing in an efficient manner, you should at least define this
NEWDB (or the NDBM described earlier) in your Build m4 file. The db(3) routines are
used to look up aliases and are the routines used by the User Database (?§23.7.27 on page
942). They can also be used to declare hash and btree type maps (?§23.2.2 on page 882)
with the K configuration command.
The db(3) libraries have overcome many of the limitations of the earlier ndbm(3) libraries. If
possible, you should get and install the db(3) libraries before you build sendmail (see ?§3.
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