Gentoo Packages

Warning: USE flag 'lto' used by mail-client/thunderbird but has no description in metadata.xml, use.local.desc or use.desc
Warning: USE flag 'lto' used by www-client/firefox but has no description in metadata.xml, use.local.desc or use.desc

Package	Local Description (use.local.desc)	Metadata Description (metadata.xml)
mail-client/thunderbird	-	-
www-client/firefox	-	-

USE Flag: lto