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List: kde-panel-devel
Subject: Re: Review Request 128073: Make Wayland optional
From: Martin_Gräßlin <mgraesslin () kde ! org>
Date: 2016-06-01 9:43:36
Message-ID: 20160601094336.29452.64267 () mimi ! kde ! org
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> On June 1, 2016, 10:13 a.m., Martin Gräßlin wrote:
> > -2, see also https://bugs.kde.org/show_bug.cgi?id=361954 for explanation why we \
> > don't want this.
>
> Pino Toscano wrote:
> Nowhere there is discussed (only briefly mentioned) about support with non-Linux \
> platforms; considering libkscreen is a library used by components (and also \
> external ones, like the display configuration in LxQt), then it makes sense to me \
> making it portable.
> Making wayland mandatory in libkscreen (and also in other modules, like \
> plasma-integration, kwin, kscreenlocker) means killing outright any attempt to make \
> Plasma build on non-Linux platforms. Please reconsider this, thanks.
> Martin Gräßlin wrote:
> which non-Linux platforms which we care about don't have Wayland? Before making \
> KWayland a mandatory dependency in Plasma we did check with distro packagers. \
> Everyone was fine with it.
> Pino Toscano wrote:
> At least to my reading of Wayland sources, to build the libraries you need features \
> like signalfd and timerfd, which are non-POSIX and available only on Linux.
> Can you please point me to the discussion you had with distro packagers?
>
> Martin Gräßlin wrote:
> There are non-linux which have successfully run Weston on a DRM backend. That was \
> in the news a few weeks back, see e.g. \
> http://lists.dragonflybsd.org/pipermail/users/2016-May/249620.html
> So let's go from "theoretically not possible" to "practically not possible". Where \
> is it not possible to have a Wayland dependency?
> Concerning the discussion: a quick search showed me \
> https://mail.kde.org/pipermail/kde-distro-packagers/2015-July/000076.html, but \
> there must be an older one already as we use it in plasma-workspace (kscreenlocker) \
> since Plasma 5.2 IIRC. This makes it difficult for me to point you to the \
> discussion as it's really a long time ago.
> Bhushan Shah wrote:
> https://mail.kde.org/pipermail/release-team/2015-July/008725.html
>
> Pino Toscano wrote:
> > https://mail.kde.org/pipermail/kde-distro-packagers/2015-July/000076.html
> > https://mail.kde.org/pipermail/release-team/2015-July/008725.html
>
> The only party involved there is a Slackware packager, which is a Linux distro \
> (where the Wayland libraries can be built fine). I don't see anyone mentioning \
> non-Linux support.
> > There are non-linux which have successfully run Weston on a DRM backend. That was \
> > in the news a few weeks back, see e.g. \
> > http://lists.dragonflybsd.org/pipermail/users/2016-May/249620.html
>
> That's the second attempt at this I see (the first one was beginning of 2013 IIRC), \
> yet none of this code as been upstreamed yet.
> I don't see anyone mentioning non-Linux support.
All we can do is ask, sorry.
> That's the second attempt at this I see (the first one was beginning of 2013 IIRC), \
> yet none of this code as been upstreamed yet.
Well I find it strange that I got code from BSD users for new KWin. If it were \
impossible to build KWin anymore that wouldn't work ;-)
- Martin
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://git.reviewboard.kde.org/r/128073/#review96120
-----------------------------------------------------------
On June 1, 2016, 10:10 a.m., Pino Toscano wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/128073/
> -----------------------------------------------------------
>
> (Updated June 1, 2016, 10:10 a.m.)
>
>
> Review request for Plasma, Solid, Daniel Vrátil, Martin Gräßlin, and Sebastian \
> Kügler.
>
> Repository: libkscreen
>
>
> Description
> -------
>
> Look for KF5Wayland as optional package, not building all the Wayland-related code \
> (backend, additions to tests, DPMS support in kscreen-doctor) if it is not \
> available.
> This allows libkscreen to build again on platforms without Wayland, such as \
> non-Linux or old Linux distros.
>
> Diffs
> -----
>
> CMakeLists.txt 9c834d9500fa0b89764516464bd58e835671977b
> autotests/CMakeLists.txt 2c8ee3d2021b1222072d6a1faafaff1b336d27e3
> backends/CMakeLists.txt 3563e138454edcc0c874237745123b09077d067c
> src/doctor/CMakeLists.txt 7294d88af127a6604bc7e48e16342c93f152de8c
> src/doctor/doctor.cpp a156f006212e63c155a6f643929d0a5880275731
> tests/CMakeLists.txt 1489d21383e13cd1431a81d48b4a272c28302041
>
> Diff: https://git.reviewboard.kde.org/r/128073/diff/
>
>
> Testing
> -------
>
> Builds fine.
>
>
> Thanks,
>
> Pino Toscano
>
>
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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/128073/">https://git.reviewboard.kde.org/r/128073/</a>
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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <p style="margin-top: 0;">On June 1st, 2016, 10:13 a.m. CEST, <b>Martin \
Gräßlin</b> wrote:</p> <blockquote style="margin-left: 1em; border-left: 2px solid \
#d0d0d0; padding-left: 10px;"> <pre style="white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">-2, see also \
https://bugs.kde.org/show_bug.cgi?id=361954 for explanation why we don't want \
this.</p></pre> </blockquote>
<p>On June 1st, 2016, 10:23 a.m. CEST, <b>Pino Toscano</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">Nowhere there is discussed (only briefly mentioned) about support with \
non-Linux platforms; considering libkscreen is a library used by components (and also \
external ones, like the display configuration in LxQt), then it makes sense to me \
making it portable.</p> <p style="padding: 0;text-rendering: inherit;margin: \
0;line-height: inherit;white-space: inherit;">Making wayland mandatory in libkscreen \
(and also in other modules, like plasma-integration, kwin, kscreenlocker) means \
killing outright any attempt to make Plasma build on non-Linux platforms. Please \
reconsider this, thanks.</p></pre> </blockquote>
<p>On June 1st, 2016, 10:29 a.m. CEST, <b>Martin Gräßlin</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">which \
non-Linux platforms which we care about don't have Wayland? Before making KWayland a \
mandatory dependency in Plasma we did check with distro packagers. Everyone was fine \
with it.</p></pre> </blockquote>
<p>On June 1st, 2016, 10:44 a.m. CEST, <b>Pino Toscano</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">At \
least to my reading of Wayland sources, to build the libraries you need features like \
signalfd and timerfd, which are non-POSIX and available only on Linux.</p> <p \
style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">Can you please point me to the discussion you had with distro \
packagers?</p></pre> </blockquote>
<p>On June 1st, 2016, 10:56 a.m. CEST, <b>Martin Gräßlin</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">There \
are non-linux which have successfully run Weston on a DRM backend. That was in the \
news a few weeks back, see e.g. \
http://lists.dragonflybsd.org/pipermail/users/2016-May/249620.html</p> <p \
style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">So let's go from "theoretically not possible" to "practically not \
possible". Where is it not possible to have a Wayland dependency?</p> <p \
style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">Concerning the discussion: a quick search showed me \
https://mail.kde.org/pipermail/kde-distro-packagers/2015-July/000076.html, but there \
must be an older one already as we use it in plasma-workspace (kscreenlocker) since \
Plasma 5.2 IIRC. This makes it difficult for me to point you to the discussion as \
it's really a long time ago.</p></pre> </blockquote>
<p>On June 1st, 2016, 10:57 a.m. CEST, <b>Bhushan Shah</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">https://mail.kde.org/pipermail/release-team/2015-July/008725.html</p></pre> \
</blockquote>
<p>On June 1st, 2016, 11:08 a.m. CEST, <b>Pino Toscano</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><blockquote \
style="text-rendering: inherit;padding: 0 0 0 1em;border-left: 1px solid \
#bbb;white-space: normal;margin: 0 0 0 0.5em;line-height: inherit;"> <p \
style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">https://mail.kde.org/pipermail/kde-distro-packagers/2015-July/000076.html \
https://mail.kde.org/pipermail/release-team/2015-July/008725.html</p> </blockquote>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">The only party involved there is a Slackware packager, \
which is a Linux distro (where the Wayland libraries can be built fine). I don't see \
anyone mentioning non-Linux support.</p> <blockquote style="text-rendering: \
inherit;padding: 0 0 0 1em;border-left: 1px solid #bbb;white-space: normal;margin: 0 \
0 0 0.5em;line-height: inherit;"> <p style="padding: 0;text-rendering: \
inherit;margin: 0;line-height: inherit;white-space: inherit;">There are non-linux \
which have successfully run Weston on a DRM backend. That was in the news a few weeks \
back, see e.g. http://lists.dragonflybsd.org/pipermail/users/2016-May/249620.html</p> \
</blockquote> <p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">That's the second attempt at this I see (the first one \
was beginning of 2013 IIRC), yet none of this code as been upstreamed yet.</p></pre> \
</blockquote>
</blockquote>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><blockquote \
style="text-rendering: inherit;padding: 0 0 0 1em;border-left: 1px solid \
#bbb;white-space: normal;margin: 0 0 0 0.5em;line-height: inherit;"> <p \
style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">I don't see anyone mentioning non-Linux support.</p> </blockquote>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">All we can do is ask, sorry.</p> <blockquote \
style="text-rendering: inherit;padding: 0 0 0 1em;border-left: 1px solid \
#bbb;white-space: normal;margin: 0 0 0 0.5em;line-height: inherit;"> <p \
style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">That's the second attempt at this I see (the first one was beginning of \
2013 IIRC), yet none of this code as been upstreamed yet.</p> </blockquote>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">Well I find it strange that I got code from BSD users \
for new KWin. If it were impossible to build KWin anymore that wouldn't work \
;-)</p></pre> <br />
<p>- Martin</p>
<br />
<p>On June 1st, 2016, 10:10 a.m. CEST, Pino Toscano wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="12" style="border: \
1px #888a85 solid; border-radius: 6px; -moz-border-radius: 6px; \
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<td>
<div>Review request for Plasma, Solid, Daniel Vrátil, Martin Gräßlin, and \
Sebastian Kügler.</div> <div>By Pino Toscano.</div>
<p style="color: grey;"><i>Updated June 1, 2016, 10:10 a.m.</i></p>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt;">Repository: </b>
libkscreen
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" \
style="border: 1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">Look for KF5Wayland as optional package, not building \
all the Wayland-related code (backend, additions to tests, DPMS support in \
kscreen-doctor) if it is not available.</p> <p style="padding: 0;text-rendering: \
inherit;margin: 0;line-height: inherit;white-space: inherit;">This allows libkscreen \
to build again on platforms without Wayland, such as non-Linux or old Linux \
distros.</p></pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">Builds fine.</p></pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>CMakeLists.txt <span style="color: \
grey">(9c834d9500fa0b89764516464bd58e835671977b)</span></li>
<li>autotests/CMakeLists.txt <span style="color: \
grey">(2c8ee3d2021b1222072d6a1faafaff1b336d27e3)</span></li>
<li>backends/CMakeLists.txt <span style="color: \
grey">(3563e138454edcc0c874237745123b09077d067c)</span></li>
<li>src/doctor/CMakeLists.txt <span style="color: \
grey">(7294d88af127a6604bc7e48e16342c93f152de8c)</span></li>
<li>src/doctor/doctor.cpp <span style="color: \
grey">(a156f006212e63c155a6f643929d0a5880275731)</span></li>
<li>tests/CMakeLists.txt <span style="color: \
grey">(1489d21383e13cd1431a81d48b4a272c28302041)</span></li>
</ul>
<p><a href="https://git.reviewboard.kde.org/r/128073/diff/" style="margin-left: \
3em;">View Diff</a></p>
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