app-text/libebook
Library parsing various ebook formats
USE Flags
doc
Global: Adds extra documentation (API, Javadoc, etc)
test
Global: Workaround to pull in packages needed to run with FEATURES=test. Portage-2.1.2 handles this internally, so don't set it in make.conf/package.use anymore
tools
Global: Create separate binary for script helper tools (currently only: versionsort); useful if they are called extremely often