[Buildroot] Build failure with Vivante and QT5 w/ eglfs

[Gary Bisson]

Antoine, All,

On Fri, Mar 4, 2016 at 2:50 PM, Antoine Tenart
<antoine.tenart at free-electrons.com> wrote:
> On Fri, Mar 04, 2016 at 12:02:31PM +0100, Gary Bisson wrote:
>> On Fri, Mar 4, 2016 at 10:55 AM, Antoine Tenart
>> <antoine.tenart at free-electrons.com> wrote:
>> >
>> > I've run into a build failure while compiling an image, when building
>> > QT5. I made some build tests to narrow down the issue and found the
>> > configuration leading to this: when compiling an image with both
>> > BR2_PACKAGE_QT5BASE_EGLFS and BR2_PACKAGE_IMX_GPU_VIV_OUTPUT_X11 the
>> > build fails with the following error:
>> >
>> > http://code.bulix.org/qxj1bn-92391?raw
>>
>> Indeed that's a problem. It looks like the question has been raised in
>> the Yocto community not so long ago:
>> https://github.com/Freescale/meta-fsl-arm/commit/da8f520a
>>
>> It looks like their patch is to define EGL_API_FB although X11 is in
>> use. I imagine we could do the same using Jérôme's approach but
>> depending on EGLFS define:
>> https://git.buildroot.net/buildroot/tree/package/freescale-imx/imx-gpu-viv/imx-gpu-viv.mk#n55
>>
>> However I guess that would only fix the build but would cause issues
>> at runtime which might be confusing for users.
>
> It's not possible to ensure every possible configuration will be
> working. A simple example would be to compile a bootloader for a board A
> and a kernel for a completely different board B.
>
> Here, the configuration leading to this build error does not make sense.
> So if we only fix the build, leading to an unusable image I guess that
> would be OK. (And fixing the build is important, for build bots for
> example).

I agree but here Thomas gave a green light on modifying the qtbase
package directly for this corner case which fixes both the build and
possible runtime issues.

BTW, who's making/sending the patch now?

Regards,
Gary