Re: [gentoo-dev] gtk2/gtk3 use flags

[Samuli Suominen]

On 16/08/13 20:12, Michael Weber wrote:
> Hello,
>
> gtk is a global use flag [1], gtk2 and gtk3 are used in metadata.xml [2].
>
> Is there a consensus how to use these flags if an app provides gtk2
> and gtk3 gui in parallel or exclusive?

'gtk' uses best possible version as defined by the package maintainer

'gtk3' is a special flag that is used when package supports both gtk and 
gtk3 at the same time, and matches the criteria of sanity which is a) 
it's an library that is used by multiple programs b) is not easy to
split, which would otherwise be preferred over using the USE flag

'gtk2' is never required, those matching it down from the list have weak 
design which goes against every other ebuild in tree, but is still 
package maintainers decision

special flags like 'IUSE="+deprecated"' can be used if there is a need 
to enable the old GTK+ implementation by default, but still provide the 
new one, in programs.  like if enabling GTK+3 instead of GTK+2 would 
disable you from using flash plug-in in a browser, would qualify in.

imho :)

- Samuli

>
> Michael
>
> [1] /usr/portage/profiles/use.desc
> gtk - Add support for x11-libs/gtk+ (The GIMP Toolkit)
>
>
> [2] egrep "gtk(2|3)" /usr/portage/profiles/use.local.desc
> app-admin/gtkdiskfree:gtk3 - Use GTK+3 instead of 2
> app-editors/emacs:gtk3 - Link against version 3 of the GIMP Toolkit
> instead of version 2 (x11-libs/gtk+)
> app-editors/emacs-vcs:gtk3 - Link against version 3 of the GIMP
> Toolkit instead of version 2 (x11-libs/gtk+)
> app-i18n/fcitx:gtk3 - Install GTK3 IM module
> app-i18n/fcitx-configtool:gtk3 - Use GTK+3 instead of 2
> app-i18n/ibus:gtk3 - Enable support for gtk+3
> app-i18n/ibus-anthy:deprecated - Install deprecated pygtk2 library
> app-i18n/ibus-unikey:gtk3 - Enable support for gtk+3
> app-i18n/imsettings:gtk3 - Enable support for x11-libs/gtk+:3
> app-i18n/scim:gtk3 - Enable support for x11-libs/gtk+:3
> app-i18n/uim:gtk3 - Enable support for x11-libs/gtk+:3
> app-office/libreoffice:gtk3 - Enable highly experimental gtk3 frontend
> dev-java/icedtea-web:gtk2 - Use x11-libs/gtk+:2 instead of x11-libs/gtk+:3
> dev-java/icedtea-web:gtk3 - Use x11-libs/gtk+:3 (default)
> dev-python/matplotlib:gtk3 - Use x11-libs/gtk+:3 instead of
> x11-libs/gtk+:2
> lxde-base/lxdm:gtk3 - Use GTK+3 instead of 2
> mail-client/claws-mail:gtk3 - Build support for GTK+3
> media-libs/libcanberra:gtk3 - Enables building of gtk+3 helper
> library, gtk+3 runtime sound effects and the canberra-gtk-play
> utility. To enable the gtk+3 sound effects add canberra-gtk-module to
> the colon separated list of modules in the GTK_MODULES environment
> variable.
> media-plugins/audacious-plugins:gtk3 - Link against version 3 of the
> GIMP Toolkit instead of version 2 (x11-libs/gtk+)
> media-sound/audacious:gtk3 - Link against version 3 of the GIMP
> Toolkit instead of version 2 (x11-libs/gtk+)
> media-sound/jalv:gtk2 - Adds support for GTK+2 in addition to GTK+3
> controlled by the gtk useflag.
> media-sound/mp3splt-gtk:gtk3 - Link against x11-libs/gtk+:3 instead of
> x11-libs/gtk+:2
> net-analyzer/wireshark:gtk2 - Build the wireshark executable with a
> GTK+ UI version 2.
> net-analyzer/wireshark:gtk3 - Build the wireshark executable with a
> GTK+ UI version 3.
> net-dns/avahi:gtk3 - Build the avahi-ui-gtk3 library, and use gtk3 for
> the avahi utilities under USE=utils
> net-libs/gtk-vnc:gtk3 - Build the gtk3 gtk-vnc library and other gtk3
> assets
> net-misc/spice-gtk:gtk3 - Link against x11-libs/gtk+:3 instead of
> x11-libs/gtk+:2
> net-p2p/eiskaltdcpp:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
> www-client/dwb:gtk3 - Link against x11-libs/gtk+:3 instead of
> x11-libs/gtk+:2
> www-client/uget:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
> www-client/uzbl:gtk3 - Use x11-libs/gtk+:3 instead of x11-libs/gtk+:2
> x11-themes/light-themes:gtk3 - Support GTK 3.x, too
> x11-wm/fvwm:gtk2-perl - Enable GTK2 Perl bindings
>