gentoo-overlay/sci-libs/libsigrok/metadata.xml

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>dev-embedded</herd>
<use>
 <flag name='ftdi'>Enable drivers that need libftdi</flag>
 <flag name='serial'>Enable drivers that are serial (RS232) based</flag>
</use>
</pkgmetadata>