I'm trying to update my system and it's complaining about unmet USE flags. It doesn't really come right out and say what USE flags I need though
gentoo ~ # emerge --update --deep --with-bdeps=y --newuse @world
* IMPORTANT: 6 news items need reading for repository 'gentoo'.
* Use eselect news to read news items.
Calculating dependencies... done!
The following USE changes are necessary to proceed:
(see "package.use" in the portage(5) man page for more details)
# required by net-libs/gnutls-2.12.23-r6[guile]
# required by net-print/cups-1.7.1-r1[gnutls,ssl]
# required by net-print/cups-filters-1.0.53
>=dev-scheme/guile-1.8.8-r1:12 networking
# required by dev-lang/ruby-1.9.3_p484[tk]
# required by dev-ruby/racc-1.4.9[ruby_targets_ruby19]
# required by dev-ruby/rdoc-4.0.1-r1[ruby_targets_ruby19]
# required by dev-lang/ruby-2.0.0_p353[rdoc]
# required by dev-ruby/rubygems-2.0.14[ruby_targets_ruby20]
=dev-lang/tcl-8.5.13-r1 threads
# required by dev-lang/ruby-1.9.3_p484[tk]
# required by dev-ruby/racc-1.4.9[ruby_targets_ruby19]
# required by dev-ruby/rdoc-4.0.1-r1[ruby_targets_ruby19]
# required by dev-lang/ruby-2.0.0_p353[rdoc]
# required by dev-ruby/rubygems-2.0.14[ruby_targets_ruby20]
=dev-lang/tk-8.5.13-r1 threads
Use --autounmask-write to write changes to config files (honoring
CONFIG_PROTECT). Carefully examine the list of proposed changes,
paying special attention to mask or keyword changes that may expose
experimental or unstable packages.
!!! The ebuild selected to satisfy "net-nds/openldap" has unmet requirements.
- net-nds/openldap-2.4.35-r1::gentoo USE="berkdb crypt cxx gnutls ipv6 minimal perl samba ssl syslog tcpd -debug -experimental -icu -iodbc -kerberos -odbc -overlays -sasl (-selinux) -slp -smbkrb5passwd"
The following REQUIRED_USE flag constraints are unsatisfied:
cxx? ( sasl )
(dependency required by "app-crypt/gnupg-2.0.25[-static,ldap]" [ebuild])
(dependency required by "dev-vcs/git-1.8.5.5[gpg]" [ebuild])
(dependency required by "sys-devel/gettext-0.18.3.2[git]" [ebuild])
(dependency required by "x11-libs/gdk-pixbuf-2.30.7-r1" [ebuild])
(dependency required by "x11-libs/gtk+-2.24.23" [ebuild])
(dependency required by "dev-python/pygtk-2.24.0-r4" [ebuild])
(dependency required by "dev-python/pygtksourceview-2.10.1-r1" [ebuild])