Bug 428770 – =x11-libs/cairo-1.12.2-r* : need use flag gles2 to compile with GLES2 surface

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Denis I. Polukarov 2012-07-31 08:24:07 UTC]

[Comment 1 Denis I. Polukarov 2012-07-31 08:24:41 UTC]

Created attachment 319826 [details]
build.log

[Comment 2 Denis I. Polukarov 2012-07-31 08:34:19 UTC]

http://lists.freedesktop.org/archives/cairo/2011-July/022136.html

[Comment 3 Matt Turner 2012-08-10 23:03:38 UTC]

Do you know what uses this?

[Comment 4 Denis I. Polukarov 2012-08-13 09:17:30 UTC]

libpango-cairo.so, and many libs linked on cairo. I have to rebuild many portages, because it need to relink on proper libs (libEGL, libGLESv2).

[Comment 5 Matt Turner 2012-09-12 06:19:47 UTC]

Created attachment 323576 [details, diff]
ebuild patch

So I tried this patch, but I get duplicated symbols. Building with USE="-opengl gles2" fixes it, but I don't see any reason these aren't supposed to be able to be built together.

[Comment 6 David Heidelberg (okias) 2013-05-24 19:30:38 UTC]

right now it has to be -opengl +gles2 or opengl -gles2, but anyway required_use solve this as workaround, till https://bugs.freedesktop.org/show_bug.cgi?id=57379 will be fixed (and maybe patch applied).

In few minutes pushing into x11 overlay (with some other fixies)

[Comment 7 David Heidelberg (okias) 2013-05-24 21:12:27 UTC]

FIXED x11-libs/cairo-1.12.14-r3::x11 overlay

[Comment 8 Chí-Thanh Christopher Nguyễn 2013-07-17 16:20:31 UTC]

cairo-1.12.14-r3 now has the gles2 flag.
I am keeping this bug open and the flag in package.use.mask until upstream #57379 is fixed.

[Comment 9 Matt Turner 2013-07-20 04:42:35 UTC]

But... again, why? What does this allow you to do?

This smells like "there's an option, let me play with it" and I don't think that's sufficient justification for supporting it.

[Comment 10 Nikoli 2013-07-20 08:49:41 UTC]

It is used by wayland and weston, see x11 overlay. Also not all arches and devices have drivers with full opengl support, some support only gles{,2}.

[Comment 11 James Le Cuirot 2014-09-06 21:55:10 UTC]

I have unmasked gles2 in an attempt to get Weston working on my ARM box. I still haven't got it working yet so I don't yet know whether that was the right thing to do but in any case, there is a problem I had to workaround. GLX support in Cairo is automagic as we currently don't pass a configure option for it. If detected during configure, it breaks a gles2 build for fairly obvious reasons. There doesn't seem to be a glx USE flag so something like $(use_enable opengl glx) should probably be added.

[Comment 12 Matt Turner 2015-05-23 19:40:11 UTC]

(In reply to Nikoli from comment #10)
> It is used by wayland and weston, see x11 overlay. Also not all arches and
> devices have drivers with full opengl support, some support only gles{,2}.

Which upstream says you shouldn't use unless you know what you're doing... bug 549912.

[Comment 13 Pacho Ramos 2016-05-28 10:43:09 UTC]

What is pending to do here for 1.14.6?

[Comment 14 Matt Turner 2016-05-29 18:40:18 UTC]

Looks like it's been added. Resolving.