@c man begin SYNOPSIS gcj-dbtool
gcj-dbtool @option{OPTION} @var{DBFILE} [@option{MORE}] @dots{}
-gcj-dbtool [@option{-n}] [@option{-a}] [@option{-f}]
+gcj-dbtool [@option{-0}] [@option{-}] [@option{-n}] [@option{-a}] [@option{-f}]
[@option{-t}] [@option{-l}] [@option{-p} [@var{LIBDIR}]]
- [@option{-v}] [@option{--version}] [@option{--help}]
+ [@option{-v}] [@option{-m}] [@option{--version}] [@option{--help}]
@c man end
@c man begin SEEALSO gij
that @var{LIB} exists before adding it to the database; @option{-f}
skips this check.
+@item [@option{-}][@option{-0}] -m @var{DBFILE} @var{DBFILE},[@var{DBFILE}]
+Merge a number of databases. The output database overwrites any
+existing database. To add databases into an existing database,
+include the destination in the list of sources.
+
+If @option{-} or @option{-0} are used, the list of files to read is
+taken from standard input instead of the command line. For
+@option{-0}, Input filenames are terminated by a null character
+instead of by whitespace. Useful when arguments might contain white
+space. The GNU find -print0 option produces input suitable for this
+mode.
+
@item -t @var{DBFILE}
Test a database.