[Qtwebengine] QtWebengine cross-compilation host compiler packages

Thu May 7 04:33:51 CEST 2020

Hi Michal,

Could you please let me know your feedback on the below questions?

Thanks and Regards,
Ramakanth

On Wed, 6 May, 2020, 08:26 Ramakanth Kesireddy, <rama.kesi at gmail.com> wrote:

> Hi All,
>
> Thanks a lot for the help. It helped to install QtWebengine( on the target
> without removing v8 snapshot feature support.
>
> Looks like issue with configure line where -no-gcc-sysroot had been
> mentioned before.
>
> A quick couple of questions:
>
> Can anyone let me know if the dependent skia graphics library is also
> built along with QtWebengine(including QtWebEngineCore and
> QtWebengineWidgets) sources?
>
> Since there is no opengl es2 on target, Can we make use of QtWebengine
> widgets to render html content without opengl( As
> https://doc.qt.io/qt-5/qtwebengine-overview.html mentions the Qt
> WebEngine Widgets module uses the Qt Quick scene graph to compose the
> elements of a web page into one view) or is it mandatory to have opengl to
> use QtWebEngine module as I need to port from QtWebkitwidgets to
> QtWebengineWidgets to setHtml?
>
> Best Regards,
> Ramakanth
>
>
>
> On Tue, May 5, 2020 at 9:21 PM Ramakanth Kesireddy <rama.kesi at gmail.com>
> wrote:
>
>> Hi,
>>
>> Attached is the configure build log for QtWebengine.
>>
>> Am using the below configure line using Qt 5.12.8 sources and even tried
>> with -no-feature-webengine-v8-snapshot-support but qtwebengine module is
>> not being built.
>> I installed the multi-lib package on Ubuntu host.
>>
>> ./configure -v -opensource -confirm-license -make libs -release -shared
>> -sysroot
>> /home/target/ti-processor-sdk-linux-rt-am335x-evm-05.03.00.07/linux-devkit/sysroots/armv7ahf-neon-linux-gnueabi
>> -device arm-linux-gnueabihf-g++ -device-option
>> CROSS_COMPILE=/home/target/ti-processor-sdk-linux-rt-am335x-evm-05.03.00.07/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-linux-gnueabihf-
>> -reduce-exports -optimize-size -no-gtk -no-use-gold-linker -qt-libjpeg
>> -qt-zlib -qt-libpng -sql-sqlite -no-xcb -no-cups -no-opengl -no-qml-debug
>> -skip qt3d -skip qtactiveqt -skip qtandroidextras -skip qtcanvas3d -skip
>> qtcharts -skip qtconnectivity -skip qtdatavis3d -skip qtdoc -skip qtgamepad
>> -skip qtgraphicaleffects -skip qtimageformats -skip qtnetworkauth -skip
>> qtlocation -skip qtmacextras -skip qtpurchasing -skip qtmultimedia -skip
>> qtquickcontrols -skip qtquickcontrols2 -skip qtremoteobjects -skip qtscript
>> -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtserialport -skip
>> qtspeech -skip qttools -skip qtwayland -skip qtwebsockets -skip qtwebview
>> -skip qtwebchannel -skip qtwinextras -skip qtandroidextras -skip
>> qtx11extras -skip qtxmlpatterns -nomake tools -nomake tests -nomake
>> examples -no-compile-examples -no-iconv -dbus -fontconfig -system-freetype
>> -ssl -qt-pcre -no-pch -recheck-all -DQT_ARCH_ARM
>>
>> As part of TI sdk 05.03.00.07 with cross compiler tool chain and sysroot,
>> Qt 5.9.7 along with QtWebengine,QtWebengineCore and QtWebeneginewidgets
>> modules are built successfully.
>> So the qtwebengine dependent packages are available in cross-compiler
>> sysroot as part of TI sdk.
>>
>> But am not sure if am missing anything in the configure line(like skipped
>> qtwebview and qtwebchannel modules incase it got any impact) or
>> PKG_CONFIG_PATH not being set properly.
>>
>> Please suggest in this regard.
>>
>> Best Regards,
>> Ramakanth
>>
>> On Mon, May 4, 2020 at 3:30 PM Michal Klocek <michal.klocek at qt.io> wrote:
>>
>>> Hi
>>>
>>> This error log does not show what exactly are you compiling, moreover
>>> error message is for your cross compiler and not for system one, meaning
>>> installing anything for system one might have no effect (depending how
>>> cross cross compilation toolchain was done) .
>>>
>>>  If 32-bit compilation does not work, v8 snapshot support should be
>>> automatically disabled by one of configure test.
>>> Please open bug report and attach full build log.
>>>
>>> I am sorry I mistyped feature parameter (there is no extra 'no')
>>> -no-feature-webengine-v8-snapshot-support  , so it should be also in
>>> 5.12.8, it disables v8 snapshots, which will result in extra startup time
>>> when initialization of javascript programs.
>>>
>>> Br
>>>
>>> Michal
>>>
>>>
>>>
>>>
>>> ------------------------------
>>> *From:* Ramakanth Kesireddy <rama.kesi at gmail.com>
>>> *Sent:* Monday, May 4, 2020 11:33 AM
>>> *To:* Michal Klocek <michal.klocek at qt.io>
>>> *Cc:* qtwebengine at lists.qt-project.org <qtwebengine at lists.qt-project.org
>>> >
>>> *Subject:* Re: [Qtwebengine] QtWebengine cross-compilation host
>>> compiler packages
>>>
>>> Hi,
>>>
>>> Below is the error thrown while building Qt 5.12.8 sources:
>>>
>>>
>>> /home/target/ti-processor-sdk-linux-rt-am335x-evm-05.03.00.07/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/../lib/gcc/arm-linux-gnueabihf/7.2.1/../../../../arm-linux-gnueabihf/bin/ld:
>>> cannot find crti.o: No such file or directory
>>> collect2: error: ld returned 1 exit status
>>> Makefile.core_module:84: recipe for target
>>> '../../lib/libQt5WebEngineCore.so.5.12.8' failed
>>> make[4]: *** [../../lib/libQt5WebEngineCore.so.5.12.8] Error 1
>>> make[4]: Leaving directory
>>> '/home/target/qt-everywhere-src-5.12.8/qtwebengine/src/core'
>>> Makefile:124: recipe for target 'sub-core_module-pro-make_first' failed
>>> make[3]: *** [sub-core_module-pro-make_first] Error 2
>>> make[3]: Leaving directory
>>> '/home/target/qt-everywhere-src-5.12.8/qtwebengine/src/core'
>>> Makefile:79: recipe for target 'sub-core-make_first' failed
>>> make[2]: *** [sub-core-make_first] Error 2
>>> make[2]: Leaving directory
>>> '/home/target/qt-everywhere-src-5.12.8/qtwebengine/src'
>>> Makefile:48: recipe for target 'sub-src-make_first' failed
>>> make[1]: *** [sub-src-make_first] Error 2
>>> make[1]: Leaving directory
>>> '/home/target/qt-everywhere-src-5.12.8/qtwebengine'
>>> Makefile:153: recipe for target 'module-qtwebengine-make_first' failed
>>> make: *** [module-qtwebengine-make_first] Error 2
>>>
>>> The cross compiled crt1.o is found
>>> in /home/target/ti-processor-sdk-linux-rt-am335x-evm-05.03.00.07/linux-devkit/sysroots/armv7ahf-neon-linux-gnueabi/usr/lib/crt1.o.
>>>
>>> Host 32 bit binaries for the missing crt1.0 are found like below:
>>> target at ubuntu:~/qt-everywhere-src-5.12.8$ find /usr/ -name crti*
>>> /usr/libx32/crti.o
>>> /usr/lib32/crti.o
>>> /usr/lib/x86_64-linux-gnu/crti.o
>>>
>>>  Can we disable build of v8 snapshot with
>>> -no-feature-nowebengine-v8-snapshot-support in Qt 5.12.8 sources and not
>>> possible in Qt 5.15 sources?
>>> So v8 snapshot doesnot requires host 32 bit binaries to cross-compile
>>> for the target device?
>>>
>>> Also is it mandatory to have opengl es2 configured for Qt to make use of
>>> QtWebEngine widgets in rendering hmtl content since there is no hardware
>>> accelerated rendering for the device?
>>>
>>> Best Regards,
>>> Ramakanth
>>>
>>>
>>> On Mon, 4 May, 2020, 14:47 Michal Klocek, <michal.klocek at qt.io> wrote:
>>>
>>> Hi
>>>
>>> I do not think we check for any specific libs for 32-bit compiler when
>>> building v8 snapshot during 64bit cross build, therefore we do not have
>>> a list or required libs. Please open bug report and specify qt version
>>> and compile error.
>>>
>>> Please note you can always disable build of v8 snapshot with
>>> -no-feature-nowebengine-v8-snapshot-support
>>>
>>> Br
>>>
>>> Michal
>>> ------------------------------
>>> *From:* QtWebEngine <qtwebengine-bounces at lists.qt-project.org> on
>>> behalf of Ramakanth Kesireddy <rama.kesi at gmail.com>
>>> *Sent:* Monday, May 4, 2020 10:44 AM
>>> *To:* qtwebengine at lists.qt-project.org <qtwebengine at lists.qt-project.org
>>> >
>>> *Subject:* [Qtwebengine] QtWebengine cross-compilation host compiler
>>> packages
>>>
>>> Hi,
>>>
>>> In the https://wiki.qt.io/QtWebEngine/How_to_Try, it mentions  in case
>>> you have the 64-bit Linux host, you need to install an adidtional 32-bit
>>> multilib packages (at least: linux-libc-dev:i386, linux-headers-xxx:i386).
>>>
>>> Am trying to cross-compile QtWebengine on 64 bit Ubuntu 16.04 host.
>>> Though I installed multi lib package and the above mentioned packages, it
>>> seems like I didnot install the necessary files to compile 32 bit for
>>> cross-compilation as it needs the host compiler that matches the target for
>>> building the v8 snapshot and it throws errors while cross-compilation.
>>>
>>> Here is the configure line:
>>>
>>> /configure -v -opensource -confirm-license -make libs -release -shared
>>> -sysroot
>>> /home/target/ti-processor-sdk-linux-rt-am335x-evm-05.03.00.07/linux-devkit/sysroots/armv7ahf-neon-linux-gnueabi
>>> -no-gcc-sysroot -device arm-linux-gnueabihf-g++ -device-option
>>> CROSS_COMPILE=/home/target/ti-processor-sdk-linux-rt-am335x-evm-05.03.00.07/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-linux-gnueabihf-
>>> -reduce-exports -optimize-size -no-gtk -force-pkg-config
>>> -no-use-gold-linker -qt-libjpeg -qt-zlib -qt-libpng -sql-sqlite -no-xcb
>>> -no-cups -no-opengl -no-qml-debug -skip qt3d -skip qtactiveqt -skip
>>> qtandroidextras -skip qtcanvas3d -skip qtcharts -skip qtconnectivity -skip
>>> qtdatavis3d -skip qtdoc -skip qtgamepad -skip qtgraphicaleffects -skip
>>> qtimageformats -skip qtnetworkauth -skip qtlocation -skip qtmacextras -skip
>>> qtpurchasing -skip qtmultimedia -skip qtquickcontrols -skip
>>> qtquickcontrols2 -skip qtremoteobjects -skip qtscript -skip qtscxml -skip
>>> qtsensors -skip qtserialbus -skip qtserialport -skip qtspeech -skip qttools
>>> -skip qtwayland -skip qtwebsockets -skip qtwebview -skip qtwebchannel -skip
>>> qtwinextras -skip qtandroidextras -skip qtx11extras -skip qtxmlpatterns
>>> -nomake tools -nomake tests -nomake examples -no-compile-examples -no-iconv
>>> -dbus -fontconfig -system-freetype -ssl -qt-pcre -no-pch -recheck-all
>>> -DQT_ARCH_ARM
>>>
>>> Could you please let me know the packages to be installed for preparing
>>> the 32 bit Ubuntu host compiler or anything am missing though sysroot is
>>> set?
>>>
>>> Best Regards,
>>> Ramakanth
>>>
>>>
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