gentoo-overlay/sys-libs/gdbm/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>base-system</herd>
<use>
 <flag name='berkdb'>enable compatibility layer for UNIX-like dbm and ndbm interfaces</flag>
 <flag name='exporter'>enable gdbmexport binary for exporting data from gdbm-1.8 databases into gdbm-1.9</flag>
</use>
</pkgmetadata>