Build Qt5 on Linux with mingw for Windows with ANGLE support for OpenGL

[cytrinox]

Hi all,
I want to build a Qt QML project on a Ubuntu Docker container for Windows. Basically, it works if the Windows host has OpenGL support. If not (a Win10 in KVM virtualization) the binary starts a window frame and segfaults after few seconds without any information. With WinDbg I see that it crashes somewhere in opengl functions.

If I change the renderer via:

QQuickWindow::setSceneGraphBackend(QSGRendererInterface::Software);

the build with -opengl desktop runs fine on non-OpenGL Windows (except that some renderings are broken like gradients, ColorOverlay etc.) so I'm pretty sure it is related to OpenGL handling.

I assume the core of the problem is that I configure Qt with -opengl desktop. So there is no fallback if OpenGL is not supported. So the trick would be to compile Qt with -opengl dynamic and -angle. But for unknown reason, configure fails and I can't figure out what dependencies for mingw I need.

./configure -v -prefix /opt/qt5-w64-mingw32 -opensource -confirm-license -release -nomake tests -nomake examples -skip qtwebengine  -qt-zlib -qt-freetype -qt-pcre -qt-harfbuzz -opengl dynamic -platform linux-g++-64 -xplatform win32-g++ -device-option CROSS_COMPILE=/usr/bin/x86_64-w64-mingw32-  -skip qtactiveqt -angle -nomake tools

Output of configure script:

(see https://paste.debian.net/1228367/  for full test log)

Done running configuration tests.

Configure summary:

Building on: linux-g++-64 (x86_64, CPU features: mmx sse sse2)
Building for: win32-g++ (x86_64, CPU features: mmx sse sse2)
Target compiler: gcc 9.3.0
Configuration: cross_compile sse2 aesni sse3 ssse3 sse4_1 sse4_2 compile_examples largefile precompile_header rdrnd rdseed shani x86SimdAlways shared shared release c++11 c++14 c++17 c++1z concurrent dbus no-pkg-config stl
Build options:
  Mode ................................... release
  Optimize release build for size ........ no
  Building shared libraries .............. yes
  Using C standard ....................... C11
  Using C++ standard ..................... C++17
  Relocatable ............................ yes
  Using precompiled headers .............. yes
  Using LTCG ............................. no
  Target compiler supports:
    SSE .................................. SSE2 SSE3 SSSE3 SSE4.1 SSE4.2
    AVX .................................. <none>
    AVX512 ............................... <none>
    Other x86 ............................ AES RDRAND SHA
    Intrinsics without -mXXX option ...... yes
  Build parts ............................ libs
  App store compliance ................... no
Qt modules and options:
  Qt Concurrent .......................... yes
  Qt D-Bus ............................... yes
  Qt D-Bus directly linked to libdbus .... no
  Qt Gui ................................. yes
  Qt Network ............................. yes
  Qt Sql ................................. yes
  Qt Testlib ............................. yes
  Qt Widgets ............................. yes
  Qt Xml ................................. yes
Support enabled for:
  Using pkg-config ....................... no
  udev ................................... no
  Using system zlib ...................... no
  Zstandard support ...................... no
Qt Core:
  DoubleConversion ....................... yes
    Using system DoubleConversion ........ no
  GLib ................................... no
  iconv .................................. no
  ICU .................................... no
  Built-in copy of the MIME database ..... yes
  Tracing backend ........................ <none>
  Logging backends:
    journald ............................. no
    syslog ............................... no
    slog2 ................................ no
  PCRE2 .................................. yes
    Using system PCRE2 ................... no
Qt Network:
  getifaddrs() ........................... no
  IPv6 ifname ............................ no
  libproxy ............................... no
  Schannel ............................... no
  OpenSSL ................................ no
    Qt directly linked to OpenSSL ........ no
  OpenSSL 1.1 ............................ no
  DTLS ................................... no
  OCSP-stapling .......................... no
  SCTP ................................... no
  Use system proxies ..................... yes
  GSSAPI ................................. no
Qt Gui:
  Accessibility .......................... yes
  FreeType ............................... yes
    Using system FreeType ................ no
  HarfBuzz ............................... yes
    Using system HarfBuzz ................ no
  Fontconfig ............................. no
  Image formats:
    GIF .................................. yes
    ICO .................................. yes
    JPEG ................................. yes
      Using system libjpeg ............... no
    PNG .................................. yes
      Using system libpng ................ no
  Text formats:
    HtmlParser ........................... yes
    CssParser ............................ yes
    OdfWriter ............................ yes
    MarkdownReader ....................... yes
      Using system libmd4c ............... no
    MarkdownWriter ....................... yes
  EGL .................................... no
  OpenVG ................................. no
  OpenGL:
    ANGLE ................................ no
    Desktop OpenGL ....................... no
    Dynamic OpenGL ....................... no
    OpenGL ES 2.0 ........................ no
    OpenGL ES 3.0 ........................ no
    OpenGL ES 3.1 ........................ no
    OpenGL ES 3.2 ........................ no
  Vulkan ................................. no
  Session Management ..................... yes
Features used by QPA backends:
  evdev .................................. no
  libinput ............................... no
  INTEGRITY HID .......................... no
  mtdev .................................. no
  tslib .................................. no
  xkbcommon .............................. no
  X11 specific:
    XLib ................................. no
    XCB Xlib ............................. no
    EGL on X11 ........................... no
    xkbcommon-x11 ........................ no
QPA backends:
  DirectFB ............................... no
  EGLFS .................................. no
  LinuxFB ................................ no
  VNC .................................... no
  Windows:
    Direct 2D ............................ yes
    DirectWrite .......................... yes
    DirectWrite 2 ........................ yes
Qt Sql:
  SQL item models ........................ yes
Qt Widgets:
  GTK+ ................................... no
  Styles ................................. Fusion Windows WindowsVista
Qt PrintSupport:
  CUPS ................................... no
Qt Sql Drivers:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. no
  OCI (Oracle) ........................... no
  ODBC ................................... yes
  PostgreSQL ............................. no
  SQLite2 ................................ no
  SQLite ................................. yes
    Using system provided SQLite ......... no
  TDS (Sybase) ........................... no
Qt Testlib:
  Tester for item models ................. yes
Serial Port:
  ntddmodm ............................... yes
Qt SerialBus:
  Socket CAN ............................. no
  Socket CAN FD .......................... no
  SerialPort Support ..................... yes
Further Image Formats:
  JasPer ................................. no
  MNG .................................... no
  TIFF ................................... yes
    Using system libtiff ................. no
  WEBP ................................... yes
    Using system libwebp ................. no
Qt QML:
  QML network support .................... yes
  QML debugging and profiling support .... yes
  QML just-in-time compiler .............. yes
  QML sequence object .................... yes
  QML XML http request ................... yes
  QML Locale ............................. yes
Qt QML Models:
  QML list model ......................... yes
  QML delegate model ..................... yes
Qt Quick:
  Direct3D 12 ............................ no
  AnimatedImage item ..................... yes
  Canvas item ............................ yes
  Support for Qt Quick Designer .......... yes
  Flipable item .......................... yes
  GridView item .......................... yes
  ListView item .......................... yes
  TableView item ......................... yes
  Path support ........................... yes
  PathView item .......................... yes
  Positioner items ....................... yes
  Repeater item .......................... yes
  ShaderEffect item ...................... yes
  Sprite item ............................ yes
QtQuick3D:
  Assimp ................................. yes
  System Assimp .......................... no
Qt Scxml:
  ECMAScript data model for QtScxml ...... yes
Qt Gamepad:
  SDL2 ................................... no
Qt 3D GeometryLoaders:
  Autodesk FBX ........................... no
Qt Wayland Client ........................ no
Qt Wayland Compositor .................... no
Qt Bluetooth:
  BlueZ .................................. no
  BlueZ Low Energy ....................... no
  Linux Crypto API ....................... no
  Native Win32 Bluetooth ................. no
  WinRT Bluetooth API (desktop & UWP) .... no
  WinRT advanced bluetooth low energy API (desktop & UWP) . no
Qt Sensors:
  sensorfw ............................... no
Qt Quick Controls 2:
  Styles ................................. Default Fusion Imagine Material Universal
Qt Quick Templates 2:
  Hover support .......................... yes
  Multi-touch support .................... yes
Qt Positioning:
  Gypsy GPS Daemon ....................... no
  WinRT Geolocation API .................. no
Qt Location:
  Qt.labs.location experimental QML plugin . yes
  Geoservice plugins:
    OpenStreetMap ........................ yes
    HERE ................................. yes
    Esri ................................. yes
    Mapbox ............................... yes
    MapboxGL ............................. no
    Itemsoverlay ......................... yes
QtXmlPatterns:
  XML schema support ..................... yes
Qt Multimedia:
  ALSA ................................... no
  GStreamer 1.0 .......................... no
  GStreamer 0.10 ......................... no
  Video for Linux ........................ no
  OpenAL ................................. no
  PulseAudio ............................. no
  Resource Policy (libresourceqt5) ....... no
  Windows Audio Services ................. no
  DirectShow ............................. yes
  Windows Media Foundation ............... no
Qt TextToSpeech:
  Flite .................................. no
  Flite with ALSA ........................ no
  Speech Dispatcher ...................... no
Qt Tools:
  Qt Assistant ........................... yes
  Qt Designer ............................ yes
  Qt Distance Field Generator ............ yes
  kmap2qmap .............................. yes
  Qt Linguist ............................ yes
  Mac Deployment Tool .................... no
  makeqpf ................................ yes
  pixeltool .............................. yes
  qdbus .................................. yes
  qev .................................... yes
  Qt Attributions Scanner ................ yes
  qtdiag ................................. yes
  qtpaths ................................ yes
  qtplugininfo ........................... yes
  Windows deployment tool ................ yes
  WinRT Runner Tool ...................... no
Qt Tools:
  QDoc ................................... no

Note: No wayland-egl support detected. Cross-toolkit compatibility disabled.

Note: The following modules are not being compiled in this configuration:
    3dcore
    3drender

WARNING: QDoc will not be compiled, probably because libclang could not be located. This means that you cannot build the Qt documentation.

Either ensure that llvm-config is in your PATH environment variable, or set LLVM_INSTALL_DIR to the location of your llvm installation.
On Linux systems, you may be able to install libclang by installing the libclang-dev or libclang-devel package, depending on your distribution.
On macOS, you can use Homebrew's llvm package.
On Windows, you must set LLVM_INSTALL_DIR to the installation path.

ERROR: Feature 'angle' was enabled, but the pre-condition '!features.opengl-desktop && features.dxguid && tests.fxc && (features.direct3d9 || (config.winrt && features.direct3d11 && libs.d3dcompiler))' failed.

ERROR: The OpenGL functionality tests failed!
You might need to modify the include and library search paths by editing QMAKE_INCDIR_OPENGL[_ES2],
QMAKE_LIBDIR_OPENGL[_ES2] and QMAKE_LIBS_OPENGL[_ES2] in the mkspec for your platform.

My Dockerfile for this build:

FROM ubuntu:20.04

RUN \
    export DEBIAN_FRONTEND=noninteractive && \
    apt -y update && \
    apt -y upgrade && \
    apt -y install \
        mingw-w64 \
        build-essential cmake freeglut3-dev gdb git iputils-ping libgl1-mesa-dev \
        libglu1-mesa-dev libjpeg-dev libmysqlclient-dev libnss3-dev libopus-dev \
        libpng-dev libsqlite3-dev libssl-dev libx11-xcb-dev libxcb-xinerama0-dev \
        libxcb-xkb-dev libxcb1-dev libxcursor-dev libxi-dev libxml2-dev libxrender-dev \
        libxslt-dev lzip mesa-common-dev nano perl python valgrind wget zlib1g-dev \
        '^libxcb.*-dev' libxkbcommon-dev libxkbcommon-x11-dev && \
    apt -y autoremove && \
    apt -y autoclean && \
    apt -y clean && \
    rm -rf /var/lib/apt/lists/* && \
    update-alternatives --set x86_64-w64-mingw32-g++ /usr/bin/x86_64-w64-mingw32-g++-posix && \
    update-alternatives --set x86_64-w64-mingw32-gcc /usr/bin/x86_64-w64-mingw32-gcc-posix && \
    exit 0

RUN \
    set -eux && \
    cd /opt && \
    wget -q http://download.qt.io/official_releases/qt/5.15/5.15.2/single/qt-everywhere-src-5.15.2.tar.xz && \
    tar xf qt-everywhere-src-5.15.2.tar.xz && \
    rm qt-everywhere-src-5.15.2.tar.xz && \
    exit 0

RUN \
    cd /opt/qt-everywhere-src-5.15.2 && \
    ./configure -prefix /opt/qt5-w64-mingw32 -opensource -confirm-license -release \
        -nomake tests -nomake examples -skip qtwebengine  -qt-zlib -qt-freetype \
        -qt-pcre -qt-harfbuzz -opengl dynamic \
        -platform linux-g++-64 -xplatform win32-g++ -device-option CROSS_COMPILE=/usr/bin/x86_64-w64-mingw32- \
        -skip qtactiveqt && \
    make -j $(($(nproc)+4)) && \
    make install && \
    cd /opt && \
    rm -rf qt-everywhere-src-5.15.2 && \
    exit 0


ENV PATH="${PATH}:/opt/qt5-w64-mingw32/bin"
ENTRYPOINT ["/bin/bash"]

Hopefully somone can give me a hint how to solve this.