Configuring 6.2 for WebAssembly debugging

Kill-Animals

Following https://doc-snapshots.qt.io/qt6-dev/wasm.html

Which prescribes:

./configure -qt-host-path /path/to/Qt/6.2.0/platform -xplatform wasm-emscripten -prefix $PWD/qtbase

and

Source maps for stepping through code, can be created by reconfiguring Qt with the --device-option QT_WASM_SOURCE_MAP=1, and building a debug build.

Lead to this:

./configure -qt-host-path /home/anon/Library/qt6.2 -xplatform wasm-emscripten -debug -prefix $PWD/qtbase -device-option QT_WASM_SOURCE_MAP=1

Which produced this, and a similar error on 6.1

+ mkdir -p qtbase
+ cd qtbase
+ exec /home/anon/Library/qt6.2wasm/qtbase/configure -top-level -qt-host-path /home/anon/Library/qt6.2 -xplatform wasm-emscripten -debug -prefix /home/anon/Library/qt6.2wasm/qtbase -device-option QT_WASM_SOURCE_MAP=1
'/usr/local/bin/cmake' '-DQT_HOST_PATH=/home/anon/Library/qt6.2' '-DCMAKE_INSTALL_PREFIX=/home/anon/Library/qt6.2wasm/qtbase' '-DQT_QMAKE_TARGET_MKSPEC=wasm-emscripten' '-DCMAKE_BUILD_TYPE=Debug' '-DQT_QMAKE_DEVICE_OPTIONS=QT_WASM_SOURCE_MAP=1' '-G' 'Ninja' '/home/anon/Library/qt6.2wasm'
Checking dependencies of 'qtbase'
Checking dependencies of 'qtshadertools'
Checking dependencies of 'qtsvg'
Checking dependencies of 'qtdeclarative'
Checking dependencies of 'qt3d'
Checking dependencies of 'qt5compat'
Checking dependencies of 'qtactiveqt'
Checking dependencies of 'qtimageformats'
Checking dependencies of 'qtquickcontrols2'
Checking dependencies of 'qtmultimedia'
Checking dependencies of 'qtcharts'
Checking dependencies of 'qtcoap'
Checking dependencies of 'qtconnectivity'
Checking dependencies of 'qtdatavis3d'
Checking dependencies of 'qttools'
Checking dependencies of 'qtdoc'
Checking dependencies of 'qtserialport'
Checking dependencies of 'qtlocation'
Checking dependencies of 'qtlottie'
Checking dependencies of 'qtmqtt'
Checking dependencies of 'qtnetworkauth'
Checking dependencies of 'qtopcua'
Checking dependencies of 'qtqa'
Checking dependencies of 'qtquicktimeline'
Checking dependencies of 'qtquick3d'
Checking dependencies of 'qtremoteobjects'
Checking dependencies of 'qtscxml'
Checking dependencies of 'qtsensors'
Checking dependencies of 'qtserialbus'
Checking dependencies of 'qttranslations'
Checking dependencies of 'qtvirtualkeyboard'
Checking dependencies of 'qtwayland'
Checking dependencies of 'qtwebsockets'
Checking dependencies of 'qtwebchannel'
Checking dependencies of 'qtwebengine'
Checking dependencies of 'qtwebview'
Configuring 'qtbase'
CMake Error at qtbase/cmake/QtSetup.cmake:179 (find_package):
  Could not find a package configuration file provided by "Qt6HostInfo" with
  any of the following names:

    Qt6HostInfoConfig.cmake
    qt6hostinfo-config.cmake

  Add the installation prefix of "Qt6HostInfo" to CMAKE_PREFIX_PATH or set
  "Qt6HostInfo_DIR" to a directory containing one of the above files.  If
  "Qt6HostInfo" provides a separate development package or SDK, be sure it
  has been installed.
Call Stack (most recent call first):
  qtbase/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake:229 (include)
  qtbase/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake:372 (qt_build_internals_set_up_private_api)
  qtbase/CMakeLists.txt:74 (qt_build_repo_begin)


-- Configuring incomplete, errors occurred!
See also "/home/anon/Library/qt6.2wasm/CMakeFiles/CMakeOutput.log".
CMake Error at qtbase/cmake/QtProcessConfigureArgs.cmake:937 (message):
  CMake exited with code 1.

When looking for the file, a Readme states:

If this directory is empty, you probably forgot to compile the Qt library.

I am not sure what to do.

Kill-Animals

I figured out what was wrong. I needed this command instead:

./configure -qt-host-path /home/anon/Library/qt6.2/qtbase -xplatform wasm-emscripten -debug -prefix $PWD/qtbase -device-option QT_WASM_SOURCE_MAP=1

Kill-Animals

Okay it compiles, but it ends up with the wrong ABI.

lorn.potter

Did you build the qt6.2 host libraries?

You might need to also specify the emscripten toolchain file path
-DCMAKE_TOOLCHAIN_FILE='$HOME'/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake'

Or where ever it is

Kill-Animals

Did you build the qt6.2 host libraries?

I do not believe so, but I'm not sure what the host libraries are supposed to be.

-DCMAKE_TOOLCHAIN_FILE='$HOME'/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake'

I'll give it another shot.

Kill-Animals

It did not work. I used this line to configure:

./configure -DCMAKE_TOOLCHAIN_FILE='$HOME'/Library/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -qt-host-path /home/anon/Library/qt6.2/qtbase -xplatform wasm-emscripten -debug -prefix $PWD/qtbase -device-option QT_WASM_SOURCE_MAP=1

When I upload the Qt version into QtCreator, the ABI is always

x86-linux-generic-elf-64bit

Instead of

asmjs-unknown-unknown-emscripten-32bit

Preventing any build.