Planned maintenance has been done but it did not solve the problem. So work will continue on this and a new time for trying updates will be announced asap.
@DragonOsman said in Building Qt Apps to Wasm:
This is the error I get now when using prebuilt Qt to build the Notepad project:
wasm-ld: error: notepad.obj: machine type must be wasm32
wasm-ld: error: notepad.js_plugin_import.obj: machine type must be wasm32
wasm-ld: error: moc_notepad.obj: machine type must be wasm32
wasm-ld: error: qapplication.obj: machine type must be wasm32
wasm-ld: error: qwidget.obj: machine type must be wasm32
wasm-ld: error: qwasmlocalfileaccess.obj: machine type must be wasm32
shared:ERROR: 'C:/emsdk/upstream/bin\wasm-ld.exe -o c:\users\osman\appdata\local\temp\emscripten_temp\notepad.wasm --allow-undefined --lto-O0 main.obj notepad.obj -LC:\emsdk\upstream\emscripten\system\local\lib notepad.js_plugin_import.obj -LC:\emsdk\upstream\emscripten\system\lib moc_notepad.obj -LC:\Users\Osman\.emscripten_cache\wasm-obj C:/Qt/5.13.1/wasm_32/plugins/platforms/libqwasm.a C:/Qt/5.13.1/wasm_32/lib/libQt5EventDispatcherSupport.a C:/Qt/5.13.1/wasm_32/lib/libQt5FontDatabaseSupport.a C:/Qt/5.13.1/wasm_32/lib/libqtfreetype.a C:/Qt/5.13.1/wasm_32/lib/libQt5EglSupport.a C:/Qt/5.13.1/wasm_32/plugins/imageformats/libqgif.a C:/Qt/5.13.1/wasm_32/plugins/imageformats/libqicns.a C:/Qt/5.13.1/wasm_32/plugins/imageformats/libqico.a C:/Qt/5.13.1/wasm_32/plugins/imageformats/libqjpeg.a C:/Qt/5.13.1/wasm_32/plugins/imageformats/libqtga.a C:/Qt/5.13.1/wasm_32/plugins/imageformats/libqtiff.a C:/Qt/5.13.1/wasm_32/plugins/imageformats/libqwbmp.a C:/Qt/5.13.1/wasm_32/plugins/imageformats/libqwebp.a C:/Qt/5.13.1/wasm_32/lib/libQt5PrintSupport.a C:/Qt/5.13.1/wasm_32/lib/libQt5Widgets.a C:/Qt/5.13.1/wasm_32/lib/libQt5Gui.a C:/Qt/5.13.1/wasm_32/lib/libqtlibpng.a C:/Qt/5.13.1/wasm_32/lib/libqtharfbuzz.a C:/Qt/5.13.1/wasm_32/lib/libQt5Core.a C:/Qt/5.13.1/wasm_32/lib/libqtpcre2.a C:\Users\Osman\.emscripten_cache\wasm-obj\libc.a C:\Users\Osman\.emscripten_cache\wasm-obj\libcompiler_rt.a C:\Users\Osman\.emscripten_cache\wasm-obj\libc-wasm.a C:\Users\Osman\.emscripten_cache\wasm-obj\libc++-noexcept.a C:\Users\Osman\.emscripten_cache\wasm-obj\libc++abi-noexcept.a --whole-archive C:\Users\Osman\.emscripten_cache\wasm-obj\libembind-rtti.a --no-whole-archive C:\Users\Osman\.emscripten_cache\wasm-obj\libgl-webgl2.a C:\Users\Osman\.emscripten_cache\wasm-obj\libdlmalloc.a C:\Users\Osman\.emscripten_cache\wasm-obj\libpthread_stub.a C:\Users\Osman\.emscripten_cache\wasm-obj\libc_rt_wasm.a --import-memory --import-table -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --export __wasm_call_ctors --export __data_end --export main --export malloc --export free --export setThrew --export __errno_location --export fflush --export _ZSt18uncaught_exceptionv --export __cxa_find_matching_catch --export __cxa_is_pointer_type --export __cxa_can_catch --export emscripten_GetProcAddress --export emscripten_webgl_make_context_current --export emscripten_webgl_get_current_context --export strstr --export emscripten_builtin_memalign --export memalign --export emscripten_builtin_free --export _get_environ --export realloc --export _get_tzname --export _get_daylight --export _get_timezone --export strlen -z stack-size=5242880 --initial-memory=16777216 --no-entry --global-base=1024' failed (1)
If I pass -device-option WASM_OBJECT_FILES=1 to Qt configure when building Qt, will that fix this?
I checked notepad.obj and notepad.js_plugin_import.obj with wasm-dis.exe before and found that they were Wasm object files. But now when I check again, main.obj does have Wasm code in it but this is what I get for notepad.obj:
[parse exception: surprising value (at 0:4)]
Fatal: error in parsing wasm binary
All three of the ones from my code give the same error. How can I find those three object files from the Qt library so I can check them too?
What was your solution for machine type must be wasm32? I have been seeing this as well.
Here is my path statement. There is a lot you probably don't care about but I included it all. I downloaded and installed the latest including the MSYS utilities. Sorry, I am not familiar with the MinGW toolset. It's a little unclear to me what version the Mingw is as different parts seem to have separate versions.
Thanks for your help.
Gary
C:\emsdk;C:\emsdk\fastcomp\emscripten;
C:\emsdk\python\2.7.13.1_64bit\python-2.7.13.amd64;
C:\emsdk\java\8.152_64bit\bin;
C:\emsdk\node\8.9.1_64bit\bin;
C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\iCLS;
C:\Program Files\Intel\Intel(R) Management Engine Components\iCLS;
C:\Program Files (x86)\Windows Resource Kits\Tools;
C:\Perl64\site\bin;C:\Perl64\bin;
%SystemRoot%\system32;
%SystemRoot%;
%SystemRoot%\System32\Wbem;
%SYSTEMROOT%\System32\WindowsPowerShell\v1.0;
C:\Program Files\Microsoft SQL Server\120\Tools\Binn;
C:\Program Files\Microsoft\Web Platform Installer;
C:\Program Files\Microsoft SQL Server\130\Tools\Binn;
C:\Program Files (x86)\Calibre2;C:\Program Files\PuTTY;
C:\Program Files (x86)\WiX Toolset v3.11;
C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;
C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;
C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;
C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;
%SYSTEMROOT%\System32\OpenSSH;
C:\Program Files (x86)\IncrediBuild;
C:\Program Files\Git\cmd;
C:\Program Files\Intel\WiFi\bin;
C:\Program Files\Common Files\Intel\WirelessCommon;
C:\MinGW\bin;
C:\Program Files (x86)\GnuWin32\bin;
It needs to be served from a server. Luckily, there is a development tool in emscripten called emrun that you can use to serve the html file that gets generated when building.
@tham your browser has a variety of option for you to do so.
For chrome you could do one of the following:
CTRL-Shift-R
Use incognito mode
Use the dev settings to disable it-
Use Chrome profiles to create a profile with all caching disabled
I don't know if there's a command or something the server could send to your browser to force a complete reload.
Ok, so I updated my OS, and rebuilt my sources using the configure options :
./configure -xplatform wasm-emscripten -nomake examples -prefix $PWD/qtbase -no-warnings-are-errors -device-option WASM_OBJECT_FILES=1 -feature-thread
And building my sources with the command:
gmake -j4 module-qtbase module-qtdeclarative module-qtquickcontrols2 module-qtwebsockets module-qtsvg module-qtcharts module-qtmqtt module-qtdatavisualization
It all compiles pretty well.
But know when I try to compile a thread example (Mandelbrot for example) the building gives my this:
Qt/5.13.1/Src/qtbase/plugins/imageformats/libqwebp.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libQt5Widgets.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libQt5Gui.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libqtlibpng.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libqtharfbuzz.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libQt5Core.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libqtpcre2.a
wasm-ld: error: 'atomics' feature is disallowed by main_7512882a.o, so --shared-memory must not be used
wasm-ld: error: Target feature 'atomics' used in main.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in mandelbrotwidget.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in renderthread.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in mandelbrot.js_plugin_import.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in moc_mandelbrotwidget.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in moc_renderthread.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in main_ad242c24.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmintegration_b84335f2.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmwindow_9693253c.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmscreen_5d172ee8.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmfontdatabase_96baba53.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmeventtranslator_b3a8cbb6.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmeventdispatcher_d440ff3d.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmcompositor_943e9174.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmcursor_54ea64f6.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmopenglcontext_242faabc.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmtheme_592c2dd9.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmclipboard_11896fc1.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: Target feature 'atomics' used in qwasmservices_bcfe057a.o is disallowed by main_7512882a.o. Use --no-check-features to suppress.
wasm-ld: error: too many errors emitted, stopping now (use -error-limit=0 to see all errors)
shared:ERROR: '/Users/macbook/emsdks/emsdk/upstream/bin/wasm-ld -o /var/folders/l_/53ppf0452z7bcrt24txtwfq00000gn/T/emscripten_temp_chKBFJ/mandelbrot.wasm --allow-undefined --lto-O0 /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libqtfreetype.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libqtlibpng.a -L/Users/macbook/emsdks/emsdk/upstream/emscripten/system/local/lib main.o -L/Users/macbook/emsdks/emsdk/upstream/emscripten/system/lib mandelbrotwidget.o -L/Users/macbook/.emscripten_cache/wasm-obj renderthread.o mandelbrot.js_plugin_import.o moc_mandelbrotwidget.o moc_renderthread.o /Users/macbook/Qt/5.13.1/Src/qtbase/plugins/platforms/libqwasm.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libQt5EventDispatcherSupport.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libQt5FontDatabaseSupport.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libqtfreetype.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libQt5EglSupport.a /Users/macbook/Qt/5.13.1/Src/qtbase/plugins/imageformats/libqgif.a /Users/macbook/Qt/5.13.1/Src/qtbase/plugins/imageformats/libqicns.a /Users/macbook/Qt/5.13.1/Src/qtbase/plugins/imageformats/libqico.a /Users/macbook/Qt/5.13.1/Src/qtbase/plugins/imageformats/libqjpeg.a /Users/macbook/Qt/5.13.1/Src/qtbase/plugins/imageformats/libqtga.a /Users/macbook/Qt/5.13.1/Src/qtbase/plugins/imageformats/libqtiff.a /Users/macbook/Qt/5.13.1/Src/qtbase/plugins/imageformats/libqwbmp.a /Users/macbook/Qt/5.13.1/Src/qtbase/plugins/imageformats/libqwebp.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libQt5Widgets.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libQt5Gui.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libqtlibpng.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libqtharfbuzz.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libQt5Core.a /Users/macbook/Qt/5.13.1/Src/qtbase/lib/libqtpcre2.a /Users/macbook/.emscripten_cache/wasm-obj/libc-mt.a /Users/macbook/.emscripten_cache/wasm-obj/libcompiler_rt.a /Users/macbook/.emscripten_cache/wasm-obj/libc-wasm.a /Users/macbook/.emscripten_cache/wasm-obj/libc++-mt-noexcept.a /Users/macbook/.emscripten_cache/wasm-obj/libc++abi-mt-noexcept.a --whole-archive /Users/macbook/.emscripten_cache/wasm-obj/libembind-rtti.a --no-whole-archive /Users/macbook/.emscripten_cache/wasm-obj/libgl-mt-webgl2.a /Users/macbook/.emscripten_cache/wasm-obj/libdlmalloc-mt.a /Users/macbook/.emscripten_cache/wasm-obj/libpthread-mt.a /Users/macbook/.emscripten_cache/wasm-obj/libc_rt_wasm.a --import-memory --import-table --shared-memory -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --export __wasm_call_ctors --export __data_end --export main --export malloc --export free --export setThrew --export __errno_location --export fflush --export emscripten_get_global_libc --export __pthread_tsd_run_dtors --export _register_pthread_ptr --export pthread_self --export __emscripten_pthread_data_constructor --export emscripten_futex_wake --export memalign --export emscripten_builtin_memalign --export realloc --export emscripten_builtin_free --export _get_environ --export _ZSt18uncaught_exceptionv --export emscripten_GetProcAddress --export emscripten_webgl_make_context_current --export emscripten_webgl_get_current_context --export strstr --export _get_tzname --export _get_daylight --export _get_timezone --export strlen -z stack-size=5242880 --initial-memory=1073741824 --no-entry --max-memory=1073741824 --global-base=1024' failed (1)
gmake: *** [Makefile:320: mandelbrot.js] Error 1
10:58:20: The process "/usr/local/bin/gmake" exited with code 2.
Error while building/deploying project mandelbrot (kit: Qt 5.13.1 (Src))
When executing step "Make"
10:58:20: Elapsed time: 00:58.
And I have no clue what it means.
Thanks.
Okay, thanks!
I would prefer it to use less CPU in that case so I will open a bug after I tried it without multithreading.
Edit: Single threaded its fine (QTBUG-79953)
I was able to configure an out-of-source build, passing win32-msvc2019 as the argument for -platform, I got the output shown in this Gist: https://gist.github.com/DragonOsman/3c198095a61a7c38e2b019d3a964d416 . Notice the errors. I configured with this command:
C:/qt5/configure -static -release -opensource -feature-thread -qt-zlib -qt-libjpeg -qt-libpng -platform win32-msvc2019 -prefix C:/qt5/qtbase/win32-msvc2019
from a separate directory outside the Qt source directory and tried to build by running just nmake with no arguments. Any help is appreciated. Thanks in advance.
Edit: I tried again after re-configuring and this time not passing -static at all, but it still failed. Here's the build log from the recent try: https://gist.github.com/DragonOsman/c13d23ceca50244fb4a195f67d8e613d .
The javascript FS functions we use for syncing the settings are asynchronous, so the c'tor will complete before the settings file has synced into the wasm sandbox filesystem.
That said, there is a change that I have found helps somewhat. If you build Qt yourself, you could try this:
https://codereview.qt-project.org/c/qt/qtbase/+/264618
I think the reason for the Assert Failure errors is that I forgot to delete the files in the qtbase folder after a given build attempt. I think that's fixed now, but I still have some issues in building Qt so I'll open a thread now.
@Vadi2
Other than adding your libs with LIBS += -lblahblah
you shouldn't have to pass anything extra to Qt to get it to link statically, as QtWebAssembly does that anyway.
You could try QMAKE_LFLAGS += -static in your project if there is any issues, or it tries to link dynamically.
This thread can be closed.
For those who are looking for an answer:
Build Qt UI Application for .qmlproject file.
Attention: JS doesnt work within the project if the aim is to deploy with Qt design viewer
In Firefox Nightly or Developer Edition only, it should now be possible to set the preference "dom.postMessage.sharedArrayBuffer.bypassCOOP_COEP.insecure.enabled" to "true" in about:config to allow development in simpler environments (ie the headers will not be required). Going forward, deployment to Beta and Release browsers will still require the headers and HTTPS. Do let us know if development remains difficult.
@Vadi2 said in Qt Creator webassembly: calendar widget doesn't compile:
I've tried compiling the calendar widget using the new webassembly support in Qt Creator 4.11 beta, and it took a really long while to print out the entire text representation of the program, and then failed with:
Its not supposed to print out that wasm text in that way. Something qtcreator is doing is breaking the build.
Building will still work when you do it from the commandline and using the Qt wasm binaries.
Hi,
Although QNetworkAccessManager is supported, QNetworkConfigurationManager is not.
That said, there is a patch that implements a very simple configuration plugin for wasm, but this is out of date that you could use if you really needed to know if/when your app is online.
https://codereview.qt-project.org/c/qt/qtbase/+/235844
I managed to get it working. I just need to know how I can get Emscripten to generate the notepad_ui.h header file from the uic file. For now I built it from within Qt Creator itself using the MSVC 2017 compiler, but I do want to know how to do it with Emscripten from the command line.
I also created the menus in such a way that clicking them gives you a dropdown with one item with the same text as the button where you have to click the dropdown to perform the action. Is there a way to do it without needing to create the dropdown?
Also, how do I change the configuration from Debug to Release?
Edit: I changed it to Release mode just fine so never mind that.
Anyway, although I can build it just fine in Qt Creator, trying it with Emscripten on the command line keeps failing. I get exceptions from the Emscripten script. If Qt developers can help with this, maybe I should open a new issue asking for help on building Qt apps to Wasm.
And for some reason, when running the app, I have to choose a font twice from the font selection dialog box when I click on the menu button for selecting a font. I also don't understand why it won't just create an action in Action Editor the moment I create a menu item. Why do I have to click on the "Type here" that comes up when I click on that and create another menu item there for the same action for it to work?
There is a way to 'persist' files, but you need to sync them from the local system into the sandbox.
https://emscripten.org/docs/api_reference/Filesystem-API.html
Using the IDBFS you can copy files to a mounted IndexDB filesystem.
In fact, QSettings on wasm uses this to attempt to persist QSettings.
@lorn-potter Thanks, tried, can show the widgets but the ui components are too small, any suggestions to solve this issue?
By the way, do you know any way to make the QLineEdit accept non ascii input?This question is related to QTBUG-78826.
I load the fonts already, can paste the words from text file to QLineEdit or print the non ascii characters by program, but the QLineEdit cannot type the non ascii characters on it directly.
QFile ifile(":/fonts/wqy_compress");
if(ifile.open(QIODevice::ReadOnly)){
auto const font_id = QFontDatabase::addApplicationFontFromData(qUncompress(ifile.readAll()));
qDebug()<<__func__<<"font id:"<<font_id;
font_family_ = QFontDatabase::applicationFontFamilies(font_id).at(0);
}
QFont const monospace(font_family_ );
ui->lineEditNewChar->setFont(monospace);
Any suggestions?Thanks
@DragonOsman said in Issue with running configure.bat (Windows):
Should I close this one and open a new thread for these questions or is this thread fine?
Yes please, so other users can expect to find answers to the issue based on topic title.
If not, the solution(s) for the new issue will be embedded within the posts.
Hi,
first of all: Are you using a linux subsystem? Because you need to use Linux its not possible on windows.
The secon thing is that the Qt mkspecs need to be specified in the compilers sub.
In em and em++ both need to have "wasm-emscripten" as Qt mkspecs.
The third thing is that actually it is still not possible to to build via Qt Creator. You need to use qmake and make.
After running them the project is build and you are ready to go with a webserver like the simple python one. From there you just open the .html.
If you need more help just message me, had some issues too as right now there is still the same warning on my linux system as you have with QtVersions. I'll figure that one out soon didn't deal with it until now.
