1306613 - Make MOZ_X11 usable or remove it

Status: RESOLVED WONTFIX

(Core :: Widget: Gtk, defect)

Description

[Martin Stránský [:stransky] (ni? me)]

Recently MOZ_X11 stands for nothing. AFAIK we don't support Gtk+ without X11 and the code is unusable without MOZ_X11 defined. Also Wayland support is designed as run-time when Gtk+ build should support Wayland/X11 at the same time.

I suggest to remove the MOZ_X11 defines from widget/gtk as it has no purpose here.

Comment 1

[Martin Stránský [:stransky] (ni? me)]

Karl, what do you think? I propose to remove MOZ_X11 from widget/gtk.

Comment 2

[Mike Hommey [:glandium]]

It used to have a meaning when the Qt port was still a thing. Back then, it was a shorthand for "Qt or Gtk". Now that the Qt port is not there anymore, it's less useful.

Comment 3

[Karl Tomlinson (:karlt)]

There was an effort years ago to support another GDK2 backend, but i don't think it got very far.  It may have been DirectFB.

As you imply, a Wayland-only build would be possible.  Perhaps this may be desirable one day, but not in the near future, I guess.

I'm fine with removing MOZ_X11 preprocessor tests from widget/gtk, if you like.

In other places though, I'd like to keep MOZ_X11 where it means X graphics, for example, rather than changing these to MOZ_WIDGET_GTK tests.  In such situations, MOZ_X11 better describes the relevant factor.

Comment 4

[Takuro Ashie [:ashie]]

I'm now trying to build Wayland port without X11 (for bug1305341).

Here is the WIP branch for ESR45:

  https://github.com/mozilla-japan/gecko-dev/commits/esr45-wayland

For embedded boards it's required to reduce footprint.
Some SoC vendors provides Wayland based BSP without X11.

So I don't want remove MOZ_X11.

Comment 5

[Takuro Ashie [:ashie]]

Another reason: bug1305341comment5

Comment 6

[Martin Stránský [:stransky] (ni? me)]

Gdk defines (among others) those values:

#define 	GDK_WINDOWING_X11
#define 	GDK_WINDOWING_WAYLAND

so I think it makes sense to replace MOZ_X11 with GDK_WINDOWING_X11 in widget/gtk and also put Wayland specific code to GDK_WINDOWING_WAYLAND defines.

Comment 8

[Martin Stránský [:stransky] (ni? me)]

Let's leave MOZ_X11 as is as it's used for X11 capable builds now.