[Buildroot] Unable to choose libgtk3 when using rpi-userland package

[Buildroot] Unable to choose libgtk3 when using rpi-userland package

[Michael Toldo]

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[Buildroot] Unable to choose libgtk3 when using rpi-userland package

[Khem Raj]

> On Aug 19, 2016, at 4:43 AM, Michael Toldo <Michael_Toldo@gmx.net> wrote:
> 
> Hi everybody,
> 
> I'm trying to set up buildroot for my Raspberry Pi so I can use it as a lightweight kiosk device. For this I want to install Midori which is based on the libgtk3.
> When using rpi-userland (OpenGL is included there) I cannot select the libgtk3 package. Following info is displayed: *** libgtk3 needs an OpenGL or OpenGL EGL backend provided by mesa3d ***


Look into the build its most probably not able to deduce that userland supports it because the little tests it does for deciding that are failing.

> 
> Thanks for your help!
> 
> Regards,
> Mick
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[Buildroot] Unable to choose libgtk3 when using rpi-userland package

[Gustavo Zacarias]

On 2016-08-19 14:34, Khem Raj wrote:

>> On Aug 19, 2016, at 4:43 AM, Michael Toldo <Michael_Toldo@gmx.net>
>> wrote:
>> 
>> Hi everybody,
>> I'm trying to set up buildroot for my Raspberry Pi so I can use it
>> as a lightweight kiosk device. For this I want to install Midori
>> which is based on the libgtk3. When using rpi-userland (OpenGL is
>> included there) I cannot select the libgtk3 package. Following info
>> is displayed: *** libgtk3 needs an OpenGL or OpenGL EGL backend
>> provided by mesa3d ***
> 
> Look into the build its most probably not able to deduce that userland
> supports it because the little tests it does for deciding that are
> failing.

Hi.
The problem at the bottom is that rpi-userland doesn't provide 
wayland-egl which is required glue for wayland/weston support.
Right now the only declared provider of wayland-egl in buildroot is 
mesa, which means he'd have to use vc4-drm instead of the broadcom 
blobs.
Yann is working on making this a virtual since other EGL providers will 
show up.
Currently we lack a vc4-drm sample defconfig, i have a WIP but it isn't 
quite functional yet.
Regards.

[Buildroot] Unable to choose libgtk3 when using rpi-userland package

[Khem Raj]

> On Aug 19, 2016, at 12:35 PM, Gustavo Zacarias <gustavo@zacarias.com.ar> wrote:
> 
> On 2016-08-19 14:34, Khem Raj wrote:
> 
>>> On Aug 19, 2016, at 4:43 AM, Michael Toldo <Michael_Toldo@gmx.net>
>>> wrote:
>>> Hi everybody,
>>> I'm trying to set up buildroot for my Raspberry Pi so I can use it
>>> as a lightweight kiosk device. For this I want to install Midori
>>> which is based on the libgtk3. When using rpi-userland (OpenGL is
>>> included there) I cannot select the libgtk3 package. Following info
>>> is displayed: *** libgtk3 needs an OpenGL or OpenGL EGL backend
>>> provided by mesa3d ***
>> Look into the build its most probably not able to deduce that userland
>> supports it because the little tests it does for deciding that are
>> failing.
> 
> Hi.
> The problem at the bottom is that rpi-userland doesn't provide wayland-egl which is required glue for wayland/weston support.
> Right now the only declared provider of wayland-egl in buildroot is mesa, which means he'd have to use vc4-drm instead of the broadcom blobs.
> Yann is working on making this a virtual since other EGL providers will show up.
> Currently we lack a vc4-drm sample defconfig, i have a WIP but it isn't quite functional yet.
> Regards.

here is collection of patches for wayland support with userland

https://github.com/kraj/userland/commits/kraj/master

We use it with meta-raspberrypi in OE and it works well.
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[Buildroot] Unable to choose libgtk3 when using rpi-userland package

[Thomas Petazzoni]

Hello,

On Fri, 19 Aug 2016 13:43:42 +0200, Michael Toldo wrote:

> I'm trying to set up buildroot for my Raspberry Pi so I can use it as
> a lightweight kiosk device. For this I want to install Midori which
> is based on the libgtk3. When using rpi-userland (OpenGL is included
> there) I cannot select the libgtk3 package. Following info is
> displayed: *** libgtk3 needs an OpenGL or OpenGL EGL backend provided
> by mesa3d ***

There has been some discussion on the IRC channel today about this
question. libgtk3 requires either an OpenGL implementation, or an EGL
implementation that provides egl-wayland.

rpi-userland provides neither OpenGL, nor an egl-wayland
implementation, which explains why you cannot select rpi-userland.

Of course, this is our current understanding of what rpi-userland
provides, and what libgtk3 requires. If you believe this is wrong and
you're able to make things work differently, let us know.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com