[oe] [meta-qt5] Qt 5.8 examples are not built

Tue Apr 25 12:45:16 UTC 2017

Hello Heikki,

thanks again. Of course I have tried a clean build. We have nightly builds set up here, running from a completely fresh checked out tree.

I see the examples packages for the Qt modules, and there is one for qtbase as well. But as I said, it is empty. There are no files in qtbase-examples (build/tmp/work/<platform>/qtbase/5.8.0+gitAUTOINC+49dc9aa409-r0/packages-split/qtbase-examples is an empty directory).

The build of the qtbase package is successful, though. But I cannot install qtbase-examples to an image, because empty packages cannot be installed. And the package is empty because the examples are not built in the qtbase compile step. That's the problem.

Mit freundlichen Grüßen / Best regards
i.A. Tim Jaacks

Software Engineering
Garz & Fricke GmbH
Tempowerkring 2, 21079 Hamburg - Germany
Amtsgericht Hamburg HRB 60514
Geschäftsführer: Manfred Garz, Matthias Fricke
Phone: +49 40 791899 - 55
Fax:     +49 40 791899 - 39
tim.jaacks at garz-fricke.com
www.garz-fricke.com

> -----Ursprüngliche Nachricht-----
> Von: Heikki Sarkanen [mailto:heikki.sarkanen at tamtron.fi]
> Gesendet: Dienstag, 25. April 2017 14:15
> An: Tim Jaacks; openembedded-devel at lists.openembedded.org
> Betreff: Re: [meta-qt5] Qt 5.8 examples are not built
> 
> Hello Tim,
> 
> Sorry for my partially incorrect answer. Actually you cannot build those "-
> examples" recipes like "qtquickcontrols2-examples" because those are just
> packages [1] provided by the "qtquickcontrols2" recipe. Do you see the
> examples packages with "bitbake -e qtquickcontrols2 | grep ^PACKAGES=" ?
> In any case you should still be able to install the "-examples" packages. One
> more possible solution may be to properly clean your environment when
> upgrading from Qt 5.7 to 5.8. I think you could achieve that by creating a
> completely new build folder by sourcing the init script or by removing the
> tmp under the current one.
> 
> [1] https://github.com/meta-qt5/meta-
> qt5/blob/9927aacfc3b341eb36764fbe7d5a929d4f05f327/recipes-
> qt/qt5/qt5.inc#L52
> 
> BR,
> Heikki Sarkanen
> ________________________________________
> From: Tim Jaacks <tim.jaacks at garz-fricke.com>
> Sent: 25 April 2017 12:23
> To: Heikki Sarkanen; openembedded-devel at lists.openembedded.org
> Subject: Re: [meta-qt5] Qt 5.8 examples are not built
> 
> Hello Hekki,
> 
> thanks for your reply. I cannot use sub-packages as a parameter to bitbake, it
> accepts recipe names only. Is this a new feature? I am on Yocto Jethro.
> 
> However, adding the qtbase-examples package to IMAGE_INSTALL does not
> make any difference. Maybe this works for other Qt packages (which use the
> qmake5_base_do_configure function just like before), but it doesn't work
> for qtbase, because the qtbase-examples packages is empty. As I said, the
> examples are not compiled at all, so they cannot be installed either.
> 
> 
> Mit freundlichen Grüßen / Best regards
> i.A. Tim Jaacks
> 
> Software Engineering
> Garz & Fricke GmbH
> Tempowerkring 2, 21079 Hamburg - Germany Amtsgericht Hamburg HRB
> 60514
> Geschäftsführer: Manfred Garz, Matthias Fricke
> Phone: +49 40 791899 - 55
> Fax:     +49 40 791899 - 39
> tim.jaacks at garz-fricke.com
> www.garz-fricke.com
> 
> 
> > -----Ursprüngliche Nachricht-----
> > Von: Heikki Sarkanen [mailto:heikki.sarkanen at tamtron.fi]
> > Gesendet: Montag, 24. April 2017 18:55
> > An: Tim Jaacks; openembedded-devel at lists.openembedded.org
> > Betreff: Re: [meta-qt5] Qt 5.8 examples are not built
> >
> > Hi,
> >
> > I don't know how the PACKAGECONFIG in qtbase has worked but I have
> > built Qt examples with meta-qt5 on both Qt 5.7 and 5.8 by using the
> > "<qtrecipe>- examples" packages like in Wandboard wiki [1]. So if you
> > want to build examples for qtquickcontrols2 you should build that
> > package: "bitbake qtquickcontrols2-examples". If you want to include
> > some examples to your image you could use 'IMAGE_INSTALL_append =
> > "qtquickcontrols2-examples qtlocation-examples"'.
> >
> > [1]
> >
> http://wiki.wandboard.org/index.php/Building_Qt5_using_yocto_on_Wand
> > board
> >
> > BR,
> > Heikki Sarkanen
> >
> > ________________________________________
> > From: openembedded-devel-bounces at lists.openembedded.org
> > <openembedded-devel-bounces at lists.openembedded.org> on behalf of
> Tim
> > Jaacks <tim.jaacks at garz-fricke.com>
> > Sent: 24 April 2017 17:21
> > To: openembedded-devel at lists.openembedded.org
> > Subject: [oe] [meta-qt5] Qt 5.8 examples are not built
> >
> > Hello,
> >
> > I recently updated my meta-qt5 layer to the current head version
> > (https://github.com/meta-qt5/meta-
> > qt5/commit/9927aacfc3b341eb36764fbe7d5a929d4f05f327) resulting in an
> > upgrade to Qt 5.8. Since this upgrade, the Qt examples are not built
> > anymore, even though I added them to PACKAGECONFIG of qtbase. Is this
> > a known issue?
> >
> > In Qt 5.7 the examples were built correctly. As far as I understand,
> > the line that used to make this work in versions before Qt 5.8 is in
> > meta-qt5/recipes-
> > qt/qt5/qt5.inc:
> >
> > | EXTRA_QMAKEVARS_PRE += "${@bb.utils.contains('PACKAGECONFIG',
> > 'examples', 'QT_BUILD_PARTS+=examples', '', d)}"
> >
> > The qmake5_base_do_configure function in meta-
> > qt5/classes/qmake5_base.bbclass evaluates this variable:
> >
> > | if [ ! -z "${EXTRA_QMAKEVARS_PRE}" ]; then
> > |     QMAKE_VARSUBST_PRE="${EXTRA_QMAKEVARS_PRE}"
> > |     bbnote "qmake prevar substitution: '${EXTRA_QMAKEVARS_PRE}'"
> > | fi
> >
> > This leads to the following note in log.do_configure of qtbase:
> >
> > | NOTE: qmake prevar substitution: ' QT_BUILD_PARTS+=examples'
> >
> > However, this note is missing in Qt 5.8 because the call to
> > qmake5_base_do_configure has been removed from the do_configure
> task
> > of qtbase here:
> >
> > https://github.com/meta-qt5/meta-
> > qt5/commit/333949a8239dfa7788b35f1059614733e11a6a25#diff-
> > 1120c73503f9288cc8a8c2b984fe4038L202
> >
> > There is no comment on why this has been removed. I tried re-adding
> > it, which resulted in a duplicate configure run. Obviously this is
> > caused by this change in qtbase:
> >
> > https://code.qt.io/cgit/qt/qtbase.git/commit/mkspecs/features/qt_parts
> > .pr
> > f?id=60e5a1c8effd4099f7b1414107b5cbb67c266210
> >
> > Does anybody know whether this change was the reason for removing the
> > qmake5_base_do_configure call?
> >
> > However, the removal breaks the mechanism via
> EXTRA_QMAKEVARS_PRE,
> > because this variable is no longer evaluated. As far as I can see,
> > there is no option of building the Qt examples at the moment. Or am I
> missing anything?
> > Any clue would be helpful.
> >
> >
> > Mit freundlichen Grüßen / Best regards i.A. Tim Jaacks
> >
> > Software Engineering
> > Garz & Fricke GmbH
> > Tempowerkring 2, 21079 Hamburg - Germany Amtsgericht Hamburg HRB
> > 60514
> > Geschäftsführer: Manfred Garz, Matthias Fricke
> > Phone: +49 40 791899 - 55
> > Fax:     +49 40 791899 - 39
> > tim.jaacks at garz-fricke.com
> > www.garz-fricke.com
> >
> >
> > --
> > _______________________________________________
> > Openembedded-devel mailing list
> > Openembedded-devel at lists.openembedded.org
> > http://lists.openembedded.org/mailman/listinfo/openembedded-devel