Category Archives: Platforms and frameworks

Building QT6.4.2 for MacOS and iOS

Build QT for MacOS separately in Debug and Release configuration:

tar xf qt-everywhere-src-6.4.2.tar.xz
cd ~/build/qt
export MY_QT_SRC_DIR=~/repos/qt-everywhere-src-6.4.2
export MY_MODE=release
#export MY_MODE=debug

export MY_INSTALL_PATH=~/libs/QT6.4/${MY_MODE}/MacOs
${MY_QT_SRC_DIR}/configure -prefix $MY_INSTALL_PATH -c++std c++20 -opensource -confirm-license \
  -static -static-runtime -${MY_MODE} -force-debug-info \
  -no-openssl -securetransport -DQT_NO_EXCEPTIONS=1 \
  -skip qt3d -skip qt5compat -skip qtactiveqt -skip qtcharts -skip qtcoap -skip qtconnectivity \
  -skip qtdatavis3d -skip qtdoc -skip qtlottie -skip qtmqtt -skip qtnetworkauth -skip qtopcua \
  -skip qtserialport -skip qtpositioning -skip qtquicktimeline -skip qtquick3d -skip qtremoteobjects \
  -skip qtscxml -skip qtsensors -skip qtserialbus -skip qtvirtualkeyboard -skip qtwayland \
  -skip qtwebchannel -skip qtwebengine -skip qtwebview -skip qtquick3dphysics -skip qtspeech -skip qtlocation \
  -skip qthttpserver \
  -- -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" \
  && cmake --build . --parallel \
  && cmake --install .
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Touch target size on Android

Probably QT “Fusion” is not an appropriate style for Android apps, because its buttons height is not enough:

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QT has Translation Rules for Plurals

For example, there is the following content in qt-everywhere-src-6.4.1\qttranslations\translations\linguist_ru.ts:

<message numerus="yes">
    <source>Dropped %n message(s) which had no ID.</source>
    <translation>
        <numerusform>Удалено %n сообщение, у которого не было ID.</numerusform>
        <numerusform>Удалено %n сообщения, у которых не было ID.</numerusform>
        <numerusform>Удалено %n сообщений, у которых не было ID.</numerusform>
    </translation>
</message>
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Building QT6.4.1 for Android on Windows

Build QT6.4.1 for Windows and then build it for Android as follows:

set MY_DRIVE=D:

cd %MY_DRIVE%\dev\build\qta
%MY_DRIVE%
     
set "CMAKE_ROOT=%MY_DRIVE%\dev\tools\cmake-3.24.2-windows-x86_64\bin"
set "NINJA_ROOT=%MY_DRIVE%\dev\tools\ninja-win"
set "PERL_ROOT=%MY_DRIVE%\dev\tools\Strawberry\perl\bin"
set "MINGW_ROOT=%MY_DRIVE%\dev\tools\x86_64-12.2.0-release-win32-seh-rt_v10-rev0\mingw64\bin"
set "PYTHON_ROOT=%MY_DRIVE%\dev\tools\Python35"
set "JDK_ROOT=C:\Program Files\Android\Android Studio\jre\bin"
             
set PATH=C:\WINDOWS\system32;C:\WINDOWS
set PATH=%CMAKE_ROOT%;%PATH%
set PATH=%NINJA_ROOT%;%PATH%
set PATH=%MINGW_ROOT%;%PATH%
set PATH=%PERL_ROOT%;%PATH%
set PATH=%PYTHON_ROOT%;%PATH%
set PATH=%JDK_ROOT%;%PATH%
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Building QT6.4.1 for Windows

Extract QT sources:

cd /d/dev/repos
tar -xf ../distrib/qt-everywhere-src-6.4.1.tar.xz

Configure QT as follows:

"C:\Program Files\Microsoft Visual Studio\2022\Professional\VC\Auxiliary\Build\vcvarsall.bat" amd64

set MY_DRIVE=D:

%MY_DRIVE%

cd %MY_DRIVE%\dev\build\qt
   
set "CMAKE_ROOT=%MY_DRIVE%\dev\tools\cmake-3.24.2-windows-x86_64\bin"
set "NINJA_ROOT=%MY_DRIVE%\dev\tools\ninja-win"
set "PERL_ROOT=%MY_DRIVE%\dev\tools\Strawberry\perl\bin"
       
set PATH=%CMAKE_ROOT%;%PATH%
set PATH=%NINJA_ROOT%;%PATH%
set PATH=%PERL_ROOT%;%PATH%
set PATH=%MY_DRIVE%\dev\tools\Python35;%PATH%
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Translation of standard buttons text on Android in QT6

Found the following code in qt-everywhere-src-6.4.0\qtbase\src\plugins\platforms\android\qandroidplatformtheme.cpp:

QString QAndroidPlatformTheme::standardButtonText(int button) const
{
    switch (button) {
    case QPlatformDialogHelper::Yes:
        return QCoreApplication::translate("QAndroidPlatformTheme", "Yes");
    case QPlatformDialogHelper::YesToAll:
        return QCoreApplication::translate("QAndroidPlatformTheme", "Yes to All");
    case QPlatformDialogHelper::No:
        return QCoreApplication::translate("QAndroidPlatformTheme", "No");
    case QPlatformDialogHelper::NoToAll:
        return QCoreApplication::translate("QAndroidPlatformTheme", "No to All");
    }
    return QPlatformTheme::standardButtonText(button);
}
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QDebug can’t be used from a destructor of a static object

We can’t do this in QT:

class Global
{
public:

    ~Global()
    {
        qDebug() << "Global destructor.";
    }
};

Global g;
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QML Application Style

There was qtquickcontrols2.conf in the root directory of my app sources with the following content:

; This file can be edited to change the style of the application
; See Styling Qt Quick Controls 2 in the documentation for details:
; https://doc.qt.io/qt-6/qtquickcontrols2-styles.html

[Controls]
;Style=Default
;Style=Universal
;Style=Material
Style=Fusion
;Style=iOS

[Universal]
Theme=Light
Accent=Steel

[Material]
;Theme=Light
Theme=Dark
;Accent=BlueGrey
;Primary=BlueGray
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QT6 multimedia module crashes on iOS

After several hours of playing sounds my iOS app crashes and the QT Creator displays the following stack trace:

1 caulk::thread::join() (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/caulk.framework/caulk 0x7fff49a06293
2 std::__shared_ptr_emplace<AURemoteIO::IOThread, std::allocator<AURemoteIO::IOThread>>::__on_zero_shared() (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff438a7469
3 AURemoteIO::Stop() (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff438a58d3
4 ausdk::AUMethodStop(void *) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff438f3529
5 QDarwinAudioSink::audioDeviceStop() qdarwinaudiosink.mm 619 0x10ffa7afd
6 QDarwinAudioSink::audioDeviceIdle() qdarwinaudiosink.mm 629 0x10ffa7b68
7 QDarwinAudioSink::renderCallback(void *, unsigned int *, AudioTimeStamp const *, unsigned int, unsigned int, AudioBufferList *) qdarwinaudiosink.mm 446 0x10ffa7ab7
8 ausdk::AUInputElement::PullInput(unsigned int&, AudioTimeStamp const&, unsigned int, unsigned int) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff438f12d2
9 AUInputFormatConverter2::InputProc(OpaqueAudioConverter *, unsigned int *, AudioBufferList *, AudioStreamPacketDescription * *, void *) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff4382cf27
10 acv1::AudioConverterChain::CallInputProc(unsigned int) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore 0x7fff30323840
11 acv1::AudioConverterChain::FillBufferFromInputProc(unsigned int *, CADeprecated::CABufferList *) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore 0x7fff3032467f
12 acv1::BufferedAudioConverter::GetInputBytes(unsigned int, unsigned int&, CADeprecated::CABufferList const *&) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore 0x7fff3045c7bd
13 acv1::CBRConverter::RenderOutput(CADeprecated::CABufferList *, unsigned int, unsigned int&, AudioStreamPacketDescription *) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore 0x7fff303091bc
14 acv1::BufferedAudioConverter::FillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription *) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore 0x7fff3045c589
15 acv1::AudioConverterChain::RenderOutput(CADeprecated::CABufferList *, unsigned int, unsigned int&, AudioStreamPacketDescription *) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore 0x7fff303235bb
16 acv1::BufferedAudioConverter::FillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription *) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore 0x7fff3045c589
17 acv1::_AudioConverterFillComplexBuffer(OpaqueAudioConverter *, int ( *)(OpaqueAudioConverter *, unsigned int *, AudioBufferList *, AudioStreamPacketDescription * *, void *), void *, unsigned int *, AudioBufferList *, AudioStreamPacketDescription *, AudioStreamPacketDependencyInfo *) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore 0x7fff30491df6
18 AudioConverterFillComplexBuffer (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/PrivateFrameworks/AudioToolboxCore.framework/AudioToolboxCore 0x7fff303a3680
19 AUConverterBase::RenderBus(unsigned int&, AudioTimeStamp const&, unsigned int, unsigned int) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff4382b617
20 AURemoteIO::RenderBus(unsigned int&, AudioTimeStamp const&, unsigned int, unsigned int) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff438a4317
21 ausdk::AUBase::DoRender(unsigned int&, AudioTimeStamp const&, unsigned int, unsigned int, AudioBufferList&) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff438f06a9
22 AURemoteIO::PerformIO(unsigned int, unsigned int, unsigned int, AudioTimeStamp const&, AudioTimeStamp const&, AudioBufferList const *, AudioBufferList *, unsigned int&) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff438af7df
23 _XPerformIO (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff438e9817
24 mshMIGPerform (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libAudioToolboxUtility.dylib 0x7fff2e30936a
25 MSHMIGDispatchMessage (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libAudioToolboxUtility.dylib 0x7fff2e309759
26 void * caulk::thread_proxy<std::tuple<caulk::thread::attributes, AURemoteIO::IOThread::IOThread(AURemoteIO&, caulk::thread::attributes const&, caulk::mach::os_workgroup const&)::'lambda'(), std::tuple<>>>(void *) (x86_64) /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AudioToolbox.framework/libEmbeddedSystemAUs.dylib 0x7fff438a7200
27 _pthread_start (x86_64) /usr/lib/system/libsystem_pthread.dylib 0x7fff6da2b8fc
28 thread_start (x86_64) /usr/lib/system/libsystem_pthread.dylib 0x7fff6da27443
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Building QT6.4 on Windows for Android with OpenSSL and clang 14

Installed latest NDK:

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