Building from source, yet still no QtWebEngine

JonathanA

As you have probably gathered from my previous questions, I'm trying to build Qt from the source so that I can have a 32 bit WebEngine on Windows. The only way to do this is to build it from source using the 64bit MSVC compiler to generate 32 bit binaries. But after following the steps found in these various places:

https://doc.qt.io/qt-5/build-sources.html
https://doc.qt.io/qt-5/configure-options.html
https://doc.qt.io/qt-5/windows-requirements.html
https://doc.qt.io/qt-5/windows-building.html
https://doc.qt.io/qt-5/qtwebengine-platform-notes.html

I still don't get any WebEngine DLLs built. I use this configuration line:

%_ROOT%\configure -prefix %_ROOT%\..\5.12 -nomake examples -nomake tests -opensource -opengl dynamic -confirm-license

And i think I have all the prerequisites, but still nothing in the QtWebEngine folder. I see some things about using git. I am using the Qt 5.12.1 source tar ball. Is the QtWebEngine source not found in there? I don't seem to get any errors when I build with jom but still no QtWebEngine. Anyway I can just build that module to see what happens?

Jonathan

SGaist

Hi,

Did you check the configure logs so see where it failed for QtWebEngine ?

JonathanA

I will, but I just wanted to make sure I didn't need to download anything else, like Chromium source or something.

JonathanA

Okay, I did find an error in the config.log:

> C:\qt-everywhere-src-5.12.1\qtwebengine\config.tests\winversion\winversion.cpp(30): fatal error C1189: #error:  unsupported Visual Studio version
> jom: C:\qt-build-lib\config.tests\winversion\Makefile [winversion.obj] Error 2
test config.qtwebengine_core.tests.webengine-winversion FAILED

It seems odd this didn't show up in the config summary:

Build type: win32-msvc (i386, CPU features: sse sse2)
Compiler: msvc 191627027
Configuration: sse2 aesni sse3 ssse3 sse4_1 sse4_2 avx avx2 avx512f avx512bw avx512cd avx512dq avx512er avx512ifma avx512pf avx512vbmi avx512vl compile_examples f16c largefile precompile_header rdrnd shani x86SimdAlways shared debug_and_release release debug build_all c++11 c++14 c++1z concurrent dbus no-pkg-config release_tools stl
Build options:
  Mode ................................... debug and release; default link: debug; optimized tools
  Optimize release build for size ........ no
  Building shared libraries .............. yes
  Using C standard ....................... C89
  Using C++ standard ..................... C++1z
  Using gold linker ...................... no
  Using precompiled headers .............. yes
  Using LTCG ............................. no
  Target compiler supports:
    SSE .................................. SSE2 SSE3 SSSE3 SSE4.1 SSE4.2
    AVX .................................. AVX AVX2
    AVX512 ............................... F ER CD PF DQ BW VL IFMA VBMI
    Other x86 ............................ AES F16C RDRAND SHA
  Build parts ............................ libs tools
  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
Qt Core:
  DoubleConversion ....................... yes
    Using system DoubleConversion ........ no
  GLib ................................... no
  iconv .................................. no
  ICU .................................... no
  Tracing backend ........................ <none>
  Logging backends:
    journald ............................. no
    syslog ............................... no
    slog2 ................................ no
  Using system PCRE2 ..................... no
Qt Network:
  getifaddrs() ........................... no
  IPv6 ifname ............................ no
  libproxy ............................... no
  OpenSSL ................................ no
    Qt directly linked to OpenSSL ........ no
  OpenSSL 1.1 ............................ no
  DTLS ................................... no
  SCTP ................................... no
  Use system proxies ..................... yes
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
  EGL .................................... yes
  OpenVG ................................. no
  OpenGL:
    ANGLE ................................ yes
    Combined ANGLE Library ............... no
    Desktop OpenGL ....................... no
    Dynamic OpenGL ....................... yes
    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
    EGL on X11 ........................... no
QPA backends:
  DirectFB ............................... no
  EGLFS .................................. no
  LinuxFB ................................ no
  VNC .................................... no
  Mir client ............................. 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
Qt SerialBus:
  Socket CAN ............................. no
  Socket CAN FD .......................... no
Qt QML:
  QML network support .................... yes
  QML debugging and profiling support .... yes
  QML sequence object .................... yes
  QML list model ......................... yes
  QML XML http request ................... yes
  QML Locale ............................. yes
  QML delegate model ..................... yes
Qt Quick:
  Direct3D 12 ............................ yes
  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
Qt Scxml:
  ECMAScript data model for QtScxml ...... yes
Qt Bluetooth:
  BlueZ .................................. no
  BlueZ Low Energy ....................... no
  Linux Crypto API ....................... no
  WinRT Bluetooth API (desktop & UWP) .... yes
Qt Sensors:
  sensorfw ............................... no
Qt Positioning:
  Gypsy GPS Daemon ....................... no
  WinRT Geolocation API .................. yes
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 ................. yes
  DirectShow ............................. yes
  Windows Media Foundation ............... yes
  Media player backend ................... DirectShow
Qt Tools:
  QDoc ................................... no
Qt WebEngine:
  Embedded build ......................... no
  Pepper Plugins ......................... yes
  Printing and PDF ....................... yes
  Proprietary Codecs ..................... no
  Spellchecker ........................... yes
  Native Spellchecker .................... no
  WebRTC ................................. yes
  Use System Ninja ....................... no
  Geolocation ............................ yes
  WebChannel support ..................... yes
  Use v8 snapshot ........................ yes
  Kerberos Authentication ................ yes

I think the bit about "Embedded build: no" just means it isn't building for an embedded Linux, not for a WebEngine to embed in an app. I updated my MSVC 2017 with the latest service packs and it seems like it is working now. So it is probably a configuration bug that it doesn't report WebEngine won't be built.

Just an FYI for anyone else who wants to try this Herculean task - we got a 16 core, 32bg Amazon Instance (a c5 4xlarge) and the build, using this config line:

%_ROOT%\configure -prefix %_ROOT%\..\5.12.1-32-release -nomake examples -nomake tests -skip qtandroidextras -skip qtgamepad -skip qtmacextras -skip qtquickcontrols -skip qt3d -skip qtcanvas3d -skip qtx11extras -skip qtactiveqt -skip qtcharts -skip qtdatavis3d -skip qtpurchasing -skip qtquickcontrols2 -skip qtvirtualkeyboard -skip qtwayland -opensource -opengl dynamic -confirm-license -make-tool jom

So you see, I'm not building a bunch of pieces that we don't use.

This took 20 minutes without WebEngine and 120 minutes with WebEngine. On my older dual 3ghz Xeon machine, the one sans WebEngine took 5 hours. I'll let you do the math for how long it would probably take with it. And this is using jom!

Thanks again to SGaist for all your help!

Jonathan