[Qtwebengine] QtWebengine cross-compilation host compiler packages

[Ramakanth Kesireddy]

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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