[Buildroot] [PATCH v6 0/9] bump/choice for qt 5.8.0

[Peter Seiderer <ps.report@gmx.net>]

On Mon, 6 Feb 2017 21:24:34 +0100, Arnout Vandecappelle <arnout@mind.be> wrote:

> 
> 
> On 06-02-17 18:44, Andreas Naumann wrote:
> > Hi,
> > 
> > first of all, thanks everybody for taking over and pushing this further. My
> > finding on this below..
> > 
> > Am 06.02.2017 um 16:40 schrieb Thomas Petazzoni:
> >> Hello,
> >>
> >> On Tue, 31 Jan 2017 08:59:02 +0100, Zoltan Gyarmati wrote:
> >>
> >>> The Qt 5.8 config (and pyqt5) was tested on Raspberry Pi.
> >>
> >> As Arnout said we are trying to apply this patch series (or actually a
> >> subset of it). We have already fixed the comments that people have
> >> raised, and you can see the result at:
> >>
> >>   http://git.free-electrons.com/users/thomas-petazzoni/buildroot/log/?h=qt5-bump
> >>
> >> Unfortunately, this fails to build with the following defconfig:
> >>
> >> BR2_arm=y
> >> BR2_cortex_a8=y
> >> BR2_TOOLCHAIN_EXTERNAL=y
> >> BR2_PACKAGE_QT5=y
> >> BR2_PACKAGE_QT5BASE_LICENSE_APPROVED=y
> >> BR2_PACKAGE_QT5DECLARATIVE=y
> >> BR2_PACKAGE_QT5IMAGEFORMATS=y
> >> BR2_PACKAGE_QT5LOCATION=y
> >> BR2_PACKAGE_QT5MULTIMEDIA=y
> >> BR2_PACKAGE_QT5SENSORS=y
> >> BR2_PACKAGE_QT5SERIALBUS=y
> >> BR2_PACKAGE_QT5SVG=y
> >> BR2_PACKAGE_QT5TOOLS=y
> >> BR2_PACKAGE_QT5TOOLS_PIXELTOOL=y
> >> BR2_PACKAGE_QT5TOOLS_QTDIAG=y
> >> BR2_PACKAGE_QT5TOOLS_QTPATHS=y
> >> BR2_PACKAGE_QT5TOOLS_QTPLUGININFO=y
> >> BR2_PACKAGE_QT5WEBCHANNEL=y
> >> BR2_PACKAGE_QT5ENGINIO=y
> >>
> >> With the following error message during the qt5base build:
> >>
> >>   Project ERROR: Library 'libpng' is not defined.
> >>
> >> Could you take our branch, and see why there is this build failure ?
> > 
> > I have tried your branch and defconfig and see the same failure. Unfortunately I
> > have no idea why it happens, I have never observed that problem.
> > 
> > There are reports about these kind of problem, but without a hint for the real
> > reason.
> > https://bugreports.qt.io/browse/QTBUG-57148
> 
>  That's something else, it happens while building the bundled freetype which we
> don't do.
> 
> > https://bugreports.qt.io/browse/QTBUG-57794
> 
>  That one looks like the same issue.
> 
> > 
> > After fiddling a little, I can get over it by selecting
> > BR2_PACKAGE_QT5BASE_FONTCONFIG. Unfortunately I run out of time debugging
> > further for now.
> 
>  Since it would be really nice to have Qt5.8 in 2017.02, I wouldn't mind working
> around it with
> 
> 	# Not clear why this is needed, the build fails without it
> 	select BR2_PACKAGE_QT5BASE_FONTCONFIG if BR2_PACKAGE_QT5_VERSION_LATEST
> 
> to BR2_PACKAGE_QT5BASE_PNG. Thomas and I looked at it as well for a little while
> and couldn't come up with an explanation.
> 
>  It would be good however to report our findings in QTBUG-57794.

QTBUG-57794 points to QTBUG-58038 [1] with fix attached (see [2] and [3]),
may be worth a try?

Regards,
Peter


[1] https://bugreports.qt.io/browse/QTBUG-58038
[2] https://codereview.qt-project.org/181808
[3] https://code.qt.io/cgit/qt/qtbase.git/commit/?id=4dcfd90e4fd7d4c49138038dbbcbda8794a9fbff


> 
>  Regards,
>  Arnout
>