[gentoo-user] emerge wants to upgrade gtk+ but it's masked

[Raffaele BELARDI <raffaele.belardi@st.com>]

I have masked >gtk+-3.18.9 due to issues with meld on my system [1],[2].
Today's update wants me to unmask it [3]. Checking the ebuilds, none of 
the packages emerge lists should need a gtk+ higher than gtk+-3.18.9; 
for example the most probable candidate, gcr-3.20.,0 depends only on:
COMMON_DEPEND="
	>=app-crypt/p11-kit-0.19
	>=dev-libs/glib-2.38:2
	>=dev-libs/libgcrypt-1.2.2:0=
	>=dev-libs/libtasn1-1:=
	>=sys-apps/dbus-1
	gtk? ( >=x11-libs/gtk+-3.12:3[X,introspection?] )
	introspection? ( >=dev-libs/gobject-introspection-1.34:= )

Also none of the installed packages needs it [4].

Any way I can convince emerge to proceed with the update without 
unmasking gtk+-3.20.x?

thanks,

raffaele

-----------------------------------------------------------------

[1] # cat /etc/portage/package.mask
# the last good meld version was linked against x11-libs/gtk+-3.18.6, 
.7, .8, .9
# try masking higher library version
 >x11-libs/gtk+-3.18.9
# higher than this one pulls in x11-libs/gtk+-3.20.x
 >x11-libs/gtksourceview-3.18.3

# eix -I gtk+
[U] x11-libs/gtk+
      Available versions:
      (1)    1.2.10-r13
      (2)    *2.24.28-r1 2.24.30^t (~)2.24.31^t
      (3)    *3.16.7 3.18.9{tbz2} [m](~)3.20.8^t{tbz2} [m](~)3.20.9^t
        {X aqua broadway cloudprint colord cups debug examples 
+introspection nls test vim-syntax wayland xinerama ABI_MIPS="n32 n64 
o32" ABI_PPC="32 64" ABI_S390="32 64" ABI_X86="32 64 x32" LINGUAS="az ca 
cs da de el es et eu fi fr ga gl hr hu it ja ko lt nl nn no pl pt pt_BR 
ro ru sk sl sr sv tr uk vi"}
      Installed versions:  2.24.30(2)^t(08:43:17 AM 
08/18/2016)(introspection -aqua -cups -debug -examples -test -vim-syntax 
-xinerama ABI_MIPS="-n32 -n64 -o32" ABI_PPC="-32 -64" ABI_S390="-32 -64" 
ABI_X86="32 -64 -x32") 3.18.9(3){tbz2}(10:20:59 AM 08/10/2016)(X 
introspection -aqua -broadway -cloudprint -colord -cups -debug -examples 
-test -vim-syntax -wayland -xinerama ABI_MIPS="-n32 -n64 -o32" 
ABI_PPC="-32 -64" ABI_S390="-32 -64" ABI_X86="32 -64 -x32")


[2] with gtk+-3.20.x the tabs and buttons in meld are drawn without the 
surrounding border line thus it's unusable. I opened a bug on gnome but 
it was rightly dismissed as a packaging system issue 
(https://bugzilla.gnome.org/show_bug.cgi?id=769699).


[3] The following mask changes are necessary to proceed:
  (see "package.unmask" in the portage(5) man page for more details)
# required by app-crypt/gcr-3.20.0::gentoo[gtk]
# required by gnome-base/gvfs-1.28.3-r1::gentoo
# required by x11-libs/libfm-1.2.4::gentoo[automount,udisks]
# required by lxde-base/lxpanel-0.8.2::gentoo
# required by lxde-base/lxde-meta-0.5.5-r5::gentoo
# required by @selected
# required by @world (argument)
# /etc/portage/package.mask:
# the last good meld version was linked against x11-libs/gtk+-3.18.6, 
.7, .8, .9
# try masking higher library version
=x11-libs/gtk+-3.20.9


[4] # equery d x11-libs/gtk+
  * These packages depend on x11-libs/gtk+:
app-crypt/gcr-3.20.0 (gtk ? >=x11-libs/gtk+-3.12:3[X,introspection?])
app-crypt/pinentry-0.9.7-r1 (gtk ? x11-libs/gtk+:2)
app-editors/leafpad-0.8.18.1 (x11-libs/gtk+:2)
app-text/ghostscript-gpl-9.19 (gtk ? x11-libs/gtk+:3)
                               (gtk ? x11-libs/gtk+:2)
app-text/gtkspell-2.0.16 (x11-libs/gtk+:2)
dev-java/oracle-jre-bin-1.8.0.102 (javafx ? x11-libs/gtk+:2)
dev-libs/keybinder-0.3.1-r200 (>=x11-libs/gtk+-2.20:2)
dev-libs/libunique-1.1.6-r1 (>=x11-libs/gtk+-2.11:2[introspection?])
dev-python/pygobject-3.20.1 (test ? x11-libs/gtk+:3[introspection])
dev-util/meld-3.16.2 (>=x11-libs/gtk+-3.14:3[introspection])
games-misc/xcowsay-1.3 (x11-libs/gtk+:2)
gnome-base/gvfs-1.28.3-r1 (gtk ? >=x11-libs/gtk+-3.0:3)
gnome-base/libglade-2.6.4-r2 
(>=x11-libs/gtk+-2.24.23:2[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?])
gnome-base/librsvg-2.40.16 (tools ? >=x11-libs/gtk+-3.10.0:3)
gnome-extra/polkit-gnome-0.105-r1 (x11-libs/gtk+:3)
lxde-base/lxappearance-0.5.5 (x11-libs/gtk+:2)
lxde-base/lxde-common-0.5.5-r3 (x11-libs/gtk+:2)
lxde-base/lxde-icon-theme-0.5.0-r1 (x11-libs/gtk+:2)
lxde-base/lxinput-0.3.2 (x11-libs/gtk+:2)
lxde-base/lxpanel-0.8.1 (x11-libs/gtk+:2)
lxde-base/lxrandr-0.1.2 (x11-libs/gtk+:2)
lxde-base/lxsession-0.5.2 (x11-libs/gtk+:2)
lxde-base/lxtask-0.1.6 (x11-libs/gtk+:2)
lxde-base/lxterminal-0.2.0-r1 (!gtk3 ? x11-libs/gtk+:2)
                               (gtk3 ? x11-libs/gtk+:3)
media-gfx/gpicview-0.2.4 (>=x11-libs/gtk+-2.6:2)
media-sound/ario-1.5.1-r1 (>=x11-libs/gtk+-2.16:2)
net-im/pidgin-2.11.0 (gtk ? >=x11-libs/gtk+-2.10:2[aqua=])
sys-devel/gcc-5.4.0 (awt ? =x11-libs/gtk+-2*)
www-client/seamonkey-2.42.3.0_p0 (>=x11-libs/gtk+-2.18:2)
www-client/w3m-0.5.3-r8 (vanilla ? x11-libs/gtk+:2)
www-plugins/adobe-flash-11.2.202.632 (x11-libs/gtk+:2)
x11-libs/gtksourceview-3.18.3 (>=x11-libs/gtk+-3.16:3[introspection?])
x11-libs/libfm-1.2.4 (gtk ? >=x11-libs/gtk+-2.16:2)
x11-libs/libnotify-0.7.6-r3 (test ? 
x11-libs/gtk+:3[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?])
x11-libs/libwnck-2.31.0 (>=x11-libs/gtk+-2.19.7:2[introspection?])
x11-libs/vte-0.28.2-r207 (>=x11-libs/gtk+-2.20:2[introspection?])
x11-misc/notification-daemon-3.18.2 (>=x11-libs/gtk+-3.15.2:3)
x11-misc/obconf-2.0.4 (x11-libs/gtk+:2)
x11-misc/pcmanfm-1.2.3 (>=x11-libs/gtk+-2.16:2)