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

[Khem Raj]

> On Aug 19, 2016, at 12:35 PM, Gustavo Zacarias <gustavo at 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 at 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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