$title: net-libs/gnome-online-accounts-3.10.2:0/1::gnome [3.8.5:0/0::gentoo] USE="gnome introspection -debug -kerberos -telepathy%" [snip] ... configure: Configuring sources in telepathy-account-widgets configure: running /bin/sh ./configure '--prefix=/usr' '--build=x86_64-pc-linux-gnu' '--host=x86_64-pc-linux-gnu' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc' '--localstatedir=/var/lib' '--libdir=/usr/lib64' '--disable-silent-rules' '--disable-dependency-tracking' '--enable-compile-warnings=minimum' '--disable-schemas-compile' '--disable-maintainer-mode' '--disable-gtk-doc' '--disable-static' '--enable-documentation' '--enable-exchange' '--enable-facebook' '--enable-flickr' '--enable-twitter' '--enable-yahoo' '--enable-imap-smtp' '--enable-owncloud' '--disable-kerberos' '--disable-telepathy' 'build_alias=x86_64-pc-linux-gnu' 'host_alias=x86_64-pc-linux-gnu' 'CFLAGS=-mtune=core2 -O2 -pipe -ggdb' 'LDFLAGS=-Wl,-O1 -Wl,--as-needed' 'PKG_CONFIG_PATH=/usr/lib64/pkgconfig' '--with-cheese=no' '--disable-gudev' '--with-pkgdatadir=/usr/share/gnome-online-accounts' '--with-icondir=/usr/share/icons' '--with-gettext-package=gnome-online-accounts-tpaw' '--disable-schemas-compile' '--disable-settings' --cache-file=/dev/null --srcdir=. configure: WARNING: unrecognized options: --enable-compile-warnings, --disable-maintainer-mode, --disable-gtk-doc, --enable-documentation, --enable-exchange, --enable-facebook, --enable-flickr, --enable-twitter, --enable-yahoo, --enable-imap-smtp, --enable-owncloud, --disable-kerberos, --disable-telepathy ... checking for TPAW... no configure: error: Package requirements ( dbus-glib-1 glib-2.0 >= 2.33.3 gio-2.0 >= 2.33.3 libsecret-1 >= 0.5 gobject-2.0 libxml-2.0 telepathy-glib >= 0.19.9 x11 gtk+-3.0 >= 3.5.1 ) were not met: No package 'telepathy-glib' found [/snip]
After reading g-o-a sources, it appears that telepathy-glib could be optional but upstream did not make the necessary modification to the build system in order for it to be possible. This would require lot of work so I just made it mandatory for now.
