Using the Wayland port of QT

[Benjamin Franzke]

Just for further reference: all these patches listed here are not
needed any longer, the stuff is in the repos now.

2010/11/24 nerdopolis <bluescreen_avenger at verizon.net>:
> On Sunday, November 21, 2010 06:52:14 pm Darxus at chaosreigns.com wrote:
>> I spent a lot of time today trying to get this to work under ubuntu, with
>> input from Benjamin Franzke in the IRC channel.
>>
>> I was not successful.
>>
>> On 11/21, Benjamin Franzke wrote:
>> > http://git.overlays.gentoo.org/gitweb/?p=user/benf.git;a=blob;f=x11-libs/
>> > qt-wayland/files/config-test-wayland.patch
>>
>> That doesn't work, apparently due to hardcoding the path to drm.h instead
>> of using the version from the defined library path.
>>
>> On 11/21, Benjamin Franzke wrote:
>> > 2010/11/21 Benjamin Franzke <benjaminfranzke at googlemail.com>:
>> > > I've also created a merge request for that stuff now, so you could
>> > > also use that:
>> > > http://qt.gitorious.org/~krh/qt/qt-wayland/merge_requests/1
>> >
>> > oh I forgot to say the merge request needs the scanner PATCH i posted
>> > earlier.. so you should use the first patch for now
>>
>> The scanner patch (for wayland, not qt) is:
>> http://lists.freedesktop.org/archives/wayland-devel/2010-November/000222.ht
>> ml
>>
>> These two patches together (one for qt, one for wayland) result in a
>> segfault.
>>
>> < Darxus> $ examples/widgets/analogclock/analogclock -platform wayland
>> < Darxus> Segmentation fault
>> < bnf> Darxus: had that too...  only doing a clean rebuild helped me
>> < Darxus> bnf: Rebuild of what?
>> < bnf> Darxus: qt (yes it sucks)
>>
>> I rebuilt wayland and qt (after "git reset --hard && git clean -x -f" in
>> both), and got the segfault again.
>>
>>
>> A script of what I did (applying the qt-wayland merge request, and the
>> scanner patch for wayland):
>> http://www.chaosreigns.com/wayland/wayland-qt-build.sh
>>
>> You'll probably need some more stuff built from git which is done by my
>> ubuntu build script.
>>
>>
>> Some useful Qt build debugging stuff:
>>
>> 03:39PM < Darxus> Failed to load platform plugin "wayland". Available
>> platforms are: 03:39PM < Darxus> Minimal
>> 03:40PM < bnf> Darxus: search for qwayland.so
>> 03:40PM < bnf> *libqwayland.so
>> 03:41PM < Darxus> No libqwayland.so.
>> 03:42PM < bnf> go to config.tests/qpa/wayland/
>> 03:42PM < bnf> ist there a file "wayland"?
>> 03:42PM < Darxus> No.  Just Makefile  wayland.cpp  wayland.pro
>> 03:43PM < bnf> qmake wayland.pro && make wayland
>> 03:45PM < Darxus> wayland.cpp:2: fatal error: wayland-client.h: No such
>> file or directory 03:45PM < Darxus> $ export | grep INCL
>> 03:45PM < Darxus> declare -x C_INCLUDE_PATH="/home/darxus/install/include"
>> 03:46PM < Darxus> $ ls -l /home/darxus/install/include/wayland-client.h
>> 03:46PM < Darxus> -rw-r--r-- 1 darxus darxus 2907 2010-11-20 22:53
>> /home/darxus/install/include/wayland-client.h 03:46PM < bnf> Darxus: oh
>> maybe you need CPLUS_INCLUDE_PATH?
>> 03:48PM < Darxus> Yup, that did it, thanks.
>>
>> 04:17PM < Darxus> In file included from
>> /home/darxus/install/include/xf86drm.h:40, from
>> qwaylandintegration.cpp:20: 04:17PM < Darxus>
>> /usr/include/libdrm/drm.h:376: error: expected unqualified-id before
>> ?virtual? 04:17PM < bnf> Darxus: update you libdrm
>> 04:18PM < Darxus> bnf: from git://anongit.freedesktop.org/git/mesa/drm ?
>> 04:19PM < Darxus> $ git pull
>> 04:19PM < Darxus> Already up-to-date.
>> 04:21PM < bnf> Darxus: /usr/include/libdrm/drm.h is used thats a problem of
>> the first patch..
>>
>> This is the problem with hardcoding the path to drm.h, which is fixed by
>> http://qt.gitorious.org/~krh/qt/qt-wayland/merge_requests/1
>
>
> Hi.
> I got it to build and work under Kubuntu Natty, I don't know how your system
> is configured, or that much about compiling things, but from the looks of it
> here is what I did different: I did not use the merge request (as I did know
> how to apply it) But I did use the patch. I only used the development packages
> that come installed by defualt in Kubuntu, and the ones I needed to use to
> build Wayland Cairo Mese and some xproto stuff. I was using kubuntu natty,
> maybe there is a version differance, or some dependancy already installed with
> Kubuntu.
>
> And be careful, I did not do this on a production install, but the install now
> causes KDE apps to fail to load, so be careful.
>
> I hope this helps a little bit.
>
> I noticed that only ./bin/qtdemo works, others say symbol lookup error:
> /usr/lib/egl/egl_dri2.so: undefined symbol: _glapi_get_proc_address
>
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