Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. Qt for WebAssembly
  4. Build simple QML on WebAssembly
QtWS25 Last Chance

Build simple QML on WebAssembly

Scheduled Pinned Locked Moved Solved Qt for WebAssembly
2 Posts 1 Posters 1.0k Views
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • K Offline
    K Offline
    kirill_f
    wrote on last edited by kirill_f
    #1

    Hello everyone,

    I'm trying to build my first app on WebAssembly.
    My setup:

    • Windows 10
    • Qt 5.15
    • emsdk install/activate sdk-fastcomp-1.39.7-64bit
    • corrected .emscripten config file in home directory, so Qt Creator could find emscripten

    But I stuck with the same build/compile error:

    14:40:44: Running steps for project untitled1...
    14:40:44: Starting: "D:\Projects\Qt\_SDK\emsdk\emsdk_env.bat" 
    Adding directories to PATH:
    PATH += D:\Projects\Qt\_SDK\emsdk
    PATH += D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten
    PATH += D:\Projects\Qt\_SDK\emsdk\node\12.18.1_64bit\bin
    PATH += D:\Projects\Qt\_SDK\emsdk\python\3.7.4-pywin32_64bit
    PATH += D:\Projects\Qt\_SDK\emsdk\java\8.152_64bit\bin
    
    Setting environment variables:
    EMSDK = D:/Projects/Qt/_SDK/emsdk
    EM_CONFIG = D:\Projects\Qt\_SDK\emsdk\.emscripten
    EM_CACHE = D:/Projects/Qt/_SDK/emsdk/fastcomp/emscripten\cache
    EMSDK_NODE = D:\Projects\Qt\_SDK\emsdk\node\12.18.1_64bit\bin\node.exe
    EMSDK_PYTHON = D:\Projects\Qt\_SDK\emsdk\python\3.7.4-pywin32_64bit\python.exe
    JAVA_HOME = D:\Projects\Qt\_SDK\emsdk\java\8.152_64bit
    14:40:45: The process "D:\Projects\Qt\_SDK\emsdk\emsdk_env.bat" exited normally.
    14:40:45: Configuration unchanged, skipping qmake step.
    14:40:45: Starting: "D:\Qt\Tools\mingw810_64\bin\mingw32-make.exe" -j8
    D:\Qt\5.15.0\wasm_32\bin\qmake.exe -install sed -e s/@APPNAME@/untitled1/g D:/Qt/5.15.0/wasm_32/plugins/platforms/wasm_shell.html > D:/Projects/Qt/_Builds/build-untitled1-Qt_5_15_0_WebAssembly-Debug/untitled1.html
    copy /y D:\Qt\5.15.0\wasm_32\plugins\platforms\qtloader.js D:\Projects\Qt\_Builds\build-untitled1-Qt_5_15_0_WebAssembly-Debug
    copy /y D:\Qt\5.15.0\wasm_32\plugins\platforms\qtlogo.svg D:\Projects\Qt\_Builds\build-untitled1-Qt_5_15_0_WebAssembly-Debug
            1 file(s) copied.
            1 file(s) copied.
    em++ -s WASM=1 -s FULL_ES2=1 -s FULL_ES3=1 -s USE_WEBGL2=1 -s EXIT_RUNTIME=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s EXTRA_EXPORTED_RUNTIME_METHODS=["UTF16ToString","stringToUTF16"] --bind -s FETCH=1 -g -s WASM=1 -s FULL_ES2=1 -s FULL_ES3=1 -s USE_WEBGL2=1 -s EXIT_RUNTIME=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s EXTRA_EXPORTED_RUNTIME_METHODS=["UTF16ToString","stringToUTF16"] --bind -s FETCH=1 -s ASSERTIONS=2 -s DEMANGLE_SUPPORT=1 -s GL_DEBUG=1 -s ALLOW_MEMORY_GROWTH=1 --source-map-base http://localhost:8000/ -o .\untitled1.js main.obj untitled1.js_plugin_import.obj untitled1.js_qml_plugin_import.obj qrc_qml.obj   D:/Qt/5.15.0/wasm_32/plugins/platforms/libqwasm.a D:/Qt/5.15.0/wasm_32/lib/libQt5EventDispatcherSupport.a D:/Qt/5.15.0/wasm_32/lib/libQt5FontDatabaseSupport.a D:/Qt/5.15.0/wasm_32/lib/libqtfreetype.a D:/Qt/5.15.0/wasm_32/lib/libQt5EglSupport.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqgif.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqicns.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqico.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqjpeg.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqtga.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqtiff.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqwbmp.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqwebp.a D:/Qt/5.15.0/wasm_32/qml/QtQuick.2/libqtquick2plugin.a D:/Qt/5.15.0/wasm_32/qml/QtQuick/Window.2/libwindowplugin.a D:/Qt/5.15.0/wasm_32/lib/libQt5Quick.a D:/Qt/5.15.0/wasm_32/lib/libQt5QmlModels.a D:/Qt/5.15.0/wasm_32/lib/libQt5Qml.a D:/Qt/5.15.0/wasm_32/lib/libQt5Gui.a D:/Qt/5.15.0/wasm_32/lib/libqtlibpng.a D:/Qt/5.15.0/wasm_32/lib/libqtharfbuzz.a D:/Qt/5.15.0/wasm_32/lib/libQt5Network.a D:/Qt/5.15.0/wasm_32/lib/libQt5Core.a D:/Qt/5.15.0/wasm_32/lib/libqtpcre2.a   
    Exception in thread Thread-6:
    Traceback (most recent call last):
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\threading.py", line 926, in _bootstrap_inner
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\threading.py", line 870, in run
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 1238, in _readerthread
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\cp1252.py", line 23, in decode
    UnicodeDecodeError: 'charmap' codec can't decode byte 0x8f in position 17942: character maps to <undefined>
    
    multiprocessing.pool.RemoteTraceback: 
    """
    Traceback (most recent call last):
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\pool.py", line 121, in worker
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\pool.py", line 44, in mapstar
      File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\shared.py", line 1305, in g_llvm_nm_uncached
        return Building.llvm_nm_uncached(filename)
      File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\shared.py", line 2116, in llvm_nm_uncached
        proc = run_process([LLVM_NM, filename], stdout=stdout, stderr=stderr, check=False)
      File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\shared.py", line 181, in run_process
        ret = subprocess.run(cmd, check=check, input=input, *args, **kw)
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 474, in run
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 939, in communicate
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 1290, in _communicate
    IndexError: list index out of range
    """
    
    The above exception was the direct cause of the following exception:
    
    Traceback (most recent call last):
      File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\emcc.py", line 3905, in <module>
        sys.exit(run(sys.argv))
      File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\emcc.py", line 2205, in run
        extra_files_to_link += system_libs.calculate([f for _, f in sorted(temp_files)] + extra_files_to_link, in_temp, stdout_=None, stderr_=None, forced=forced_stdlibs)
      File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\system_libs.py", line 1364, in calculate
        symbolses = shared.Building.parallel_llvm_nm([os.path.abspath(t) for t in temp_files])
      File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\shared.py", line 1682, in parallel_llvm_nm
        object_contents = pool.map(g_llvm_nm_uncached, files)
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\pool.py", line 268, in map
      File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\pool.py", line 657, in get
    IndexError: list index out of range
    mingw32-make: *** [Makefile:73: .\untitled1.js] Error 1
    14:40:49: The process "D:\Qt\Tools\mingw810_64\bin\mingw32-make.exe" exited with code 2.
    Error while building/deploying project untitled1 (kit: Qt 5.15.0 WebAssembly)
    When executing step "Make"
    14:40:49: Elapsed time: 00:05.
    

    741cc65e-d9b6-4f7e-a962-3880791ed407-image.png

    91b13b1a-1f96-4ac4-8298-9c11e7441f42-image.png

    K 1 Reply Last reply
    0
    • K kirill_f

      Hello everyone,

      I'm trying to build my first app on WebAssembly.
      My setup:

      • Windows 10
      • Qt 5.15
      • emsdk install/activate sdk-fastcomp-1.39.7-64bit
      • corrected .emscripten config file in home directory, so Qt Creator could find emscripten

      But I stuck with the same build/compile error:

      14:40:44: Running steps for project untitled1...
      14:40:44: Starting: "D:\Projects\Qt\_SDK\emsdk\emsdk_env.bat" 
      Adding directories to PATH:
      PATH += D:\Projects\Qt\_SDK\emsdk
      PATH += D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten
      PATH += D:\Projects\Qt\_SDK\emsdk\node\12.18.1_64bit\bin
      PATH += D:\Projects\Qt\_SDK\emsdk\python\3.7.4-pywin32_64bit
      PATH += D:\Projects\Qt\_SDK\emsdk\java\8.152_64bit\bin
      
      Setting environment variables:
      EMSDK = D:/Projects/Qt/_SDK/emsdk
      EM_CONFIG = D:\Projects\Qt\_SDK\emsdk\.emscripten
      EM_CACHE = D:/Projects/Qt/_SDK/emsdk/fastcomp/emscripten\cache
      EMSDK_NODE = D:\Projects\Qt\_SDK\emsdk\node\12.18.1_64bit\bin\node.exe
      EMSDK_PYTHON = D:\Projects\Qt\_SDK\emsdk\python\3.7.4-pywin32_64bit\python.exe
      JAVA_HOME = D:\Projects\Qt\_SDK\emsdk\java\8.152_64bit
      14:40:45: The process "D:\Projects\Qt\_SDK\emsdk\emsdk_env.bat" exited normally.
      14:40:45: Configuration unchanged, skipping qmake step.
      14:40:45: Starting: "D:\Qt\Tools\mingw810_64\bin\mingw32-make.exe" -j8
      D:\Qt\5.15.0\wasm_32\bin\qmake.exe -install sed -e s/@APPNAME@/untitled1/g D:/Qt/5.15.0/wasm_32/plugins/platforms/wasm_shell.html > D:/Projects/Qt/_Builds/build-untitled1-Qt_5_15_0_WebAssembly-Debug/untitled1.html
      copy /y D:\Qt\5.15.0\wasm_32\plugins\platforms\qtloader.js D:\Projects\Qt\_Builds\build-untitled1-Qt_5_15_0_WebAssembly-Debug
      copy /y D:\Qt\5.15.0\wasm_32\plugins\platforms\qtlogo.svg D:\Projects\Qt\_Builds\build-untitled1-Qt_5_15_0_WebAssembly-Debug
              1 file(s) copied.
              1 file(s) copied.
      em++ -s WASM=1 -s FULL_ES2=1 -s FULL_ES3=1 -s USE_WEBGL2=1 -s EXIT_RUNTIME=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s EXTRA_EXPORTED_RUNTIME_METHODS=["UTF16ToString","stringToUTF16"] --bind -s FETCH=1 -g -s WASM=1 -s FULL_ES2=1 -s FULL_ES3=1 -s USE_WEBGL2=1 -s EXIT_RUNTIME=1 -s ERROR_ON_UNDEFINED_SYMBOLS=1 -s EXTRA_EXPORTED_RUNTIME_METHODS=["UTF16ToString","stringToUTF16"] --bind -s FETCH=1 -s ASSERTIONS=2 -s DEMANGLE_SUPPORT=1 -s GL_DEBUG=1 -s ALLOW_MEMORY_GROWTH=1 --source-map-base http://localhost:8000/ -o .\untitled1.js main.obj untitled1.js_plugin_import.obj untitled1.js_qml_plugin_import.obj qrc_qml.obj   D:/Qt/5.15.0/wasm_32/plugins/platforms/libqwasm.a D:/Qt/5.15.0/wasm_32/lib/libQt5EventDispatcherSupport.a D:/Qt/5.15.0/wasm_32/lib/libQt5FontDatabaseSupport.a D:/Qt/5.15.0/wasm_32/lib/libqtfreetype.a D:/Qt/5.15.0/wasm_32/lib/libQt5EglSupport.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqgif.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqicns.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqico.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqjpeg.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqtga.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqtiff.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqwbmp.a D:/Qt/5.15.0/wasm_32/plugins/imageformats/libqwebp.a D:/Qt/5.15.0/wasm_32/qml/QtQuick.2/libqtquick2plugin.a D:/Qt/5.15.0/wasm_32/qml/QtQuick/Window.2/libwindowplugin.a D:/Qt/5.15.0/wasm_32/lib/libQt5Quick.a D:/Qt/5.15.0/wasm_32/lib/libQt5QmlModels.a D:/Qt/5.15.0/wasm_32/lib/libQt5Qml.a D:/Qt/5.15.0/wasm_32/lib/libQt5Gui.a D:/Qt/5.15.0/wasm_32/lib/libqtlibpng.a D:/Qt/5.15.0/wasm_32/lib/libqtharfbuzz.a D:/Qt/5.15.0/wasm_32/lib/libQt5Network.a D:/Qt/5.15.0/wasm_32/lib/libQt5Core.a D:/Qt/5.15.0/wasm_32/lib/libqtpcre2.a   
      Exception in thread Thread-6:
      Traceback (most recent call last):
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\threading.py", line 926, in _bootstrap_inner
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\threading.py", line 870, in run
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 1238, in _readerthread
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\cp1252.py", line 23, in decode
      UnicodeDecodeError: 'charmap' codec can't decode byte 0x8f in position 17942: character maps to <undefined>
      
      multiprocessing.pool.RemoteTraceback: 
      """
      Traceback (most recent call last):
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\pool.py", line 121, in worker
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\pool.py", line 44, in mapstar
        File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\shared.py", line 1305, in g_llvm_nm_uncached
          return Building.llvm_nm_uncached(filename)
        File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\shared.py", line 2116, in llvm_nm_uncached
          proc = run_process([LLVM_NM, filename], stdout=stdout, stderr=stderr, check=False)
        File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\shared.py", line 181, in run_process
          ret = subprocess.run(cmd, check=check, input=input, *args, **kw)
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 474, in run
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 939, in communicate
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\subprocess.py", line 1290, in _communicate
      IndexError: list index out of range
      """
      
      The above exception was the direct cause of the following exception:
      
      Traceback (most recent call last):
        File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\emcc.py", line 3905, in <module>
          sys.exit(run(sys.argv))
        File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\emcc.py", line 2205, in run
          extra_files_to_link += system_libs.calculate([f for _, f in sorted(temp_files)] + extra_files_to_link, in_temp, stdout_=None, stderr_=None, forced=forced_stdlibs)
        File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\system_libs.py", line 1364, in calculate
          symbolses = shared.Building.parallel_llvm_nm([os.path.abspath(t) for t in temp_files])
        File "D:\Projects\Qt\_SDK\emsdk\fastcomp\emscripten\tools\shared.py", line 1682, in parallel_llvm_nm
          object_contents = pool.map(g_llvm_nm_uncached, files)
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\pool.py", line 268, in map
        File "D:\obj\windows-release\37amd64_Release\msi_python\zip_amd64\pool.py", line 657, in get
      IndexError: list index out of range
      mingw32-make: *** [Makefile:73: .\untitled1.js] Error 1
      14:40:49: The process "D:\Qt\Tools\mingw810_64\bin\mingw32-make.exe" exited with code 2.
      Error while building/deploying project untitled1 (kit: Qt 5.15.0 WebAssembly)
      When executing step "Make"
      14:40:49: Elapsed time: 00:05.
      

      741cc65e-d9b6-4f7e-a962-3880791ed407-image.png

      91b13b1a-1f96-4ac4-8298-9c11e7441f42-image.png

      K Offline
      K Offline
      kirill_f
      wrote on last edited by
      #2

      @kirill_f
      Problem solved. I just installed upstream version of emscrypten instead of fastcomp.

      emsdk install sdk-upstream-1.39.8-64bit
      emsdk activate sdk-upstream-1.39.8-64bit
      
      1 Reply Last reply
      1

      • Login

      • Login or register to search.
      • First post
        Last post
      0
      • Categories
      • Recent
      • Tags
      • Popular
      • Users
      • Groups
      • Search
      • Get Qt Extensions
      • Unsolved