Qt 6

Hi,
i get the same error but in a visual studio project.
Did anyone know how i can add the -entrypoint in a vs project?

Thanks!

@Herzenschein I've solved it by adding Qt${QT_VERSION_MAJOR}::WaylandClientPrivate
to target_link_libraries() of the app.
Also add -system-freetype -fontconfig to configure, to not see squares instead of letters. And -no-prefix instead of -prefix ... makes it easier, since you wont have to install.

For the future generations of humanity:

QJniObject toast = QJniObject::callStaticObjectMethod( "android/widget/Toast", "makeText", "(Landroid/content/Context;Ljava/lang/CharSequence;I)" "Landroid/widget/Toast;", QNativeInterface::QAndroidApplication::context(), displayText.object<jstring>(), timeout ); if (toast.isValid()) { qDebug() << "Toast is valid"; toast.callMethod<void>("show"); } else { qDebug() << "Toast JNI object not valid"; }

I am using version 6.5.2. and I also have this bug.

gcc -m32 should do the trick. See https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html

In order to build Qt 6.7 with this, you'll have to use a CMake toolchain file.

Here is how I've built on Linux 32 bit https://lists.qt-project.org/pipermail/development/2020-November/040702.html

@TheoSys said in Qt6.5.0: Android: Can't create main activity:

Qt5.15 app for Android to Qt6.5.0

Exactly the same problem after moving app from Qt5.15 Qt6.5

@SGaist

Thank you for your suggestion! It took some fiddling but it worked! Want to post my findings here to possibly help others in case they run into something like this.

What I did was I used

apt-cache search ffmpeg

to get a list of all the ffmpeg related packages. (Note: Run this on your board not your host machine and make sure to have done apt-get update && apt-get upgrade before hand)

From there I transferred the list into a simple apt-get install command and installed all the libs. After rsyncing everything over and reconfiguring/recompiling it worked like a dream on the board. No need to set an extra switch or anything.

Thank you for your help and I hope this helps someone else out!

CMake's ExternalProject_Add works with the bare minimum CMakeLists.txt shown below:

cmake_minimum_required(VERSION ...) project(...) include(ExternalProject) ExternalProject_Add(QtBase SOURCE_DIR ${CMAKE_SOURCE_DIR}/...)

The source code for SignalVector::at states:

ConnectionList &at(int i) { return reinterpret_cast<ConnectionList *>(this + 1)[i + 1]; }

So, basically signalVector->at(-1) could be something like the first element of the array. Because Qt uses a lot of tricks (e.g. this+1) in this internal code, I am not willing to figure it out exactly. Have a look at the source yourself if you want to figure this out.

Hi,

If I am not mistaken, something like described in this bug report should be enough.

Hope it helps

Thanks corebonts the solution to install '^libxcb' worked for me my application is running smoothly in ubuntu

@Christian-Ehrlicher Right. Changed it.

@SGaist okay. Thank you for your fast answer.

I also had this issue today, I followed https://medium.com/swlh/setting-opengl-for-windows-d0b45062caf to install opengl/glew/freeglut and added win32: LIBS += -lfreeglut -lglew32 -lopengl32 in the .pro file. Now everything is working.
PS, I strongly recommend to install libs via https://www.msys2.org/. It's quite simple and convenient.

@JonB said in How to re-use Window icons?:

So MingGW comes with all the Windows header files which might be wanted already included in the distro?

I'm guessing it's optional if you're building and deploying MinGW yourself, but it is included in the Qt distributed version (and all the major ones otherwise). I'm not sure which version of the SDK it specifically mimics and it's certainly not all of it, but most of the usual stuff is there.

@Christian-Ehrlicher @elazul Including their -dev packages.

@JoeCFD You can simply build qml6sink. Its source code is under /gstreamer/subprojects/gst-plugins-good/ext/qt6. Only a few files.

@Mesrine said in Cmake recompile qml modules even if the qml files did not change.:

Is there a way to stop this behavior?

You have 2 options:

Use the Ninja generator instead of the Makefile generator (recommended), OR Upgrade to Qt 6.5.2 (see https://bugreports.qt.io/browse/QTBUG-106683 )

Note that Qt 6.5.2 no longer causes the Makefile generator to rebuild the *.o and *.so files unnecessarily, but there are still other inefficiencies: https://bugreports.qt.io/browse/QTBUG-115166

@d_h_mcinnes said in Cmake recompile qml modules even if the qml files did not change.:

I notice that if I build my project from the command line, it rebuilds the .qml files every time. However, if I build from inside qtcreator, it only rebuilds when necessary.

It sounds like Qt Creator uses the Ninja generator but your command line does not.