Wietse Venema via Postfix-users:
> Geert Hendrickx via Postfix-users:
> > On Fri, Dec 26, 2025 at 15:10:40 -0500, Wietse Venema via Postfix-users
> > wrote:
> > > However, to build for a non-BerkeleyDB system, people may want to use:
> > >
> > > make makefiles default_database_type=lmdb CCARGS="-DNO_DB ..."
> > >
> > > Which will already do the right thing for default_cache_db_type.
> >
> >
> > >From RELEASE_NOTES-3.11:
> > > Sites that build without Berkeley DB are suggested to use one of the
> > > following commands in their build process:
> > >
> > > 1 - Make lmdb the default for both default_database_type
> > > and default_cache_db_type.
> > >
> > > make makefiles CCARGS="-NO_DB ..." default_database_type=lmdb
> > >
> > > 2 - Make cdb the default for default_database_type, and make
> > > lmdb the default for default_cache_db_type.
> > >
> > > make makefiles CCARGS="-NO_DB ..." default_database_type=cdb \
> > > default_cache_db_type=lmdb
> >
> > Actually packagers building Postfix with -NO_DB (and enabling lmdb) should
> > explicitly set "default_cache_db_type=lmdb" at build time in scenario 1 as
> > well, otherwise it will revert to (unavailable) btree for users that change
> > default_database_type to cdb or something else in their configuration, and
> > break.
>
> I don't think that is true. Here is a quick demo to verify this without
> actually installing Postfix.
>
> $ make tidy
> $ make makefiles shared=no dynamicmaps=no default_database_type=lmdb
> $ bin/postconf -c conf -x default_database_type default_cache_db_type
> default_database_type = lmdb
> default_cache_db_type = lmdb
>
> Setting default_database_type without default_cache_db_type
> will not revert default_cache_db_type to 'btree',
Sorry, I missed the part about setting default_database_type=cdb.
I will update the release notes text, and will eliminate the runitime
expansion of default_cache_db_type. It is too fragile.
Now, the remaining work is updating all the Postfix documentation
examples.
Wietse
> BTW I will fix the -NO_DB, that should be =DNO_DB.
>
> Wietse
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