dev-libs/glib always generates its man pages, but it would be helpful to be able to enable / disable this with a use flag "doc" Reproducible: Always
Thank you for your contribution. However this package does not have a USE=doc for this very much on purpose. Manual pages aren't supposed to be generally optional. The build deps are small and prevalent and the build time is negligible, so it does not justify a USE flag at all. If you do not want to install man files, use INSTALL_MASK.