dev-embedded/libftdi/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='tools'>build ftdi_eeprom helper tool</flag>
</use>
</pkgmetadata>