Cannot build in development mode

Unity Engine
1

version 2019.3.0a5

I can build my project normally but not in development mode

Failed running C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp/build/il2cpp.exe --convert-to-cpp --emit-null-checks --enable-stacktrace --enable-array-bounds-check --dotnetprofile=“unityaot” --compile-cpp --libil2cpp-static --platform=“WebGL” --architecture=“EmscriptenJavaScript” --configuration=“Release” --outputpath=“MYPATH\Assets /…/Temp/StagingArea/Data\Native\build.bc” --cachedirectory=“MYPATH\Assets..\Library/il2cpp_cache” --compiler-flags=“-Oz” --emit-method-map --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_AccessibilityModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_AIModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_AndroidJNIModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_AnimationModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_ARModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_AssetBundleModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_AudioModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_ClothModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_CoreModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_CrashReportingModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_DirectorModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_DSPGraphModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_GameCenterModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_GridModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_HotReloadModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_ImageConversionModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_IMGUIModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_InputLegacyModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_InputModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_JSONSerializeModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_LocalizationModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_ParticleSystemModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_PerformanceReportingModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_Physics2DModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_PhysicsModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_ProfilerModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_ScreenCaptureModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_SharedInternalsModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_SpriteMaskModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_SpriteShapeModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_StreamingModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_SubstanceModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_TerrainModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_TerrainPhysicsModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_TextCoreModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_TextRenderingModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_TilemapModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_TLSModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UIElementsModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UIModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UmbraModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UNETModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UnityAnalyticsModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UnityConnectModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UnityTestProtocolModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UnityWebRequestAssetBundleModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UnityWebRequestAudioModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UnityWebRequestModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UnityWebRequestTextureModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_UnityWebRequestWWWModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_VehiclesModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_VFXModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_VideoModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_VRModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_WebGLModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_WindModule_Dynamic.bc” --additional-libraries=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/PlaybackEngines/WebGLSupport\BuildTools\lib\modules_development\WebGLSupport_XRModule_Dynamic.bc” --enable-debugger --profiler-report --map-file-parser=“C:/Program Files/Unity/Hub/Editor/2019.3.0a5/Editor/Data/Tools/MapFileParser/MapFileParser.exe” --directory=“C:/Users/giuseppei/OneDrive - Agic Technology srl/Documenti/Unity/MyGPViewer4.0/Temp/StagingArea/Data/Managed” --generatedcppdir=“C:/Users/giuseppei/OneDrive - Agic Technology srl/Documenti/Unity/MyGPViewer4.0/Temp/StagingArea/Data/il2cppOutput”

stdout:
Building build.bc with EmscriptenToolChain
Output directory: MYPATH\Temp\StagingArea\Data\Native
Cache directory: MYPATH\Library\il2cpp_cache
il2cpp.exe didn’t catch exception: Unity.IL2CPP.Building.BuilderFailedException: In file included from MYPATH\Temp\StagingArea\Data\il2cppOutput\lumpedcpp\Lump_libil2cpp_os.cpp:7:
MYPATH\Temp\StagingArea\Data\il2cppOutput\lumpedcpp/…....................\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\libil2cpp\os\Emscripten\SocketBridge.cpp:8:10: fatal error: ‘emscripten/posix_socket.h’ file not found
#include <emscripten/posix_socket.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
ERROR:root:compiler frontend failed to generate LLVM bitcode, halting

Invocation was: Executable: “C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\python.exe”
Arguments: -E “C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten\em++” -Wno-unused-value -Wno-invalid-offsetof -nostdinc -fno-strict-overflow -Wno-null-conversion -std=c++11 -s USE_PTHREADS=1 -O3 -Oz -DNET_4_0 -DUNITY_AOT -DIL2CPP_MONO_DEBUGGER=1 -DIL2CPP_DEBUGGER_PORT=56000 -DPLATFORM_UNITY -DUNITY_USE_PLATFORM_STUBS -DENABLE_OVERRIDABLE_ALLOCATORS -DIL2CPP_ON_MONO=1 -DDISABLE_JIT=1 -DDISABLE_REMOTING=1 -DHAVE_CONFIG_H -DMONO_DLL_EXPORT=1 -DGC_NOT_DLL -DRUNTIME_IL2CPP -DNDEBUG -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\libil2cpp" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\libil2cpp" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\external\bdwgc\include" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\external\xxHash" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\external\mono" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\external\mono\mono\eglib" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\external\mono\mono" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\external\mono\mono\sgen" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\external\mono\mono\utils" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\external\mono\mono\metadata" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\external\mono\mono\metadata\private" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\libil2cpp\os\c-api" -I"C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\libmono\config" “MYPATH\Temp\StagingArea\Data\il2cppOutput\lumpedcpp\Lump_libil2cpp_os.cpp” -o “MYPATH\Library\il2cpp_cache\libil2cpp\B9B59419A7EA6753C312FB9A0E581DC3.o”

in Unity.IL2CPP.Building.CppProgramBuilder.BuildAllCppFiles(IEnumerable`1 sourceFilesToCompile, IBuildStatisticsCollector statisticsCollector)
in Unity.IL2CPP.Building.CppProgramBuilder.Build(IBuildStatistics& statistics)
in il2cpp.Program.DoRun(String[ ] args)
in il2cpp.Program.Run(String[ ] args)
in il2cpp.Program.Main(String[ ] args)
stderr:

Eccezione non gestita: Unity.IL2CPP.Building.BuilderFailedException: In file included from MYPATH\Temp\StagingArea\Data\il2cppOutput\lumpedcpp\Lump_libil2cpp_os.cpp:7:
MYPATH\Temp\StagingArea\Data\il2cppOutput\lumpedcpp/…....................\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\il2cpp\libil2cpp\os\Emscripten\SocketBridge.cpp:8:10: fatal error: ‘emscripten/posix_socket.h’ file not found
#include <emscripten/posix_socket.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
ERROR:root:compiler frontend failed to generate LLVM bitcode, halting

Invocation was: Executable: “C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscripten_Win\python\2.7.5.3_64bit\python.exe”
Arguments: -E "C:\Program Files\Unity\Hub\Editor\2019.3.0a5\Editor\Data\PlaybackEngines\WebGLSupport\BuildTools\Emscript

2

Hello, I had the same problem today (fatal error: ‘emscripten/posix_socket.h’ file not found), Unity 2019.2.0f. It helped me to clear Library and temp folder of the project, start unity and build again. the build succeed

1 Like
3

We’re currently having the same issue, after updating to Unity 2019.2.4f1 from Unity 2018.3.11f1, and I will try the possible solution that @DrViJ suggested.

Update: After removing the Library and obj folder the same issue still occurs.

Part of the Editor log.

stdout:
Building build.bc with EmscriptenToolChain
    Output directory: D:\Codebases\unity-presenter-webgl\Temp\StagingArea\Data\Native
    Cache directory: D:\Codebases\unity-presenter-webgl\Library\il2cpp_cache
il2cpp.exe didn't catch exception: Unity.IL2CPP.Building.BuilderFailedException: In file included from D:\Codebases\unity-presenter-webgl\Temp\StagingArea\Data\il2cppOutput\lumpedcpp\Lump_libil2cpp_os.cpp:7:
C:\Program Files\Unity\Hub\Editor\2019.2.4f1\Editor\Data\il2cpp\libil2cpp\os\Emscripten\SocketBridge.cpp:8:10: fatal error: 'emscripten/posix_socket.h' file not found
#include <emscripten/posix_socket.h>

@JoshPeterson Do you have suggestions?

4

I’m having the same issue when going from 2018.3.14 to 2019.2.9. Did you ever find a solution?

I suppose I could step back one point release at a time, but I expect the same results.

5

We had the same issue when we used the following BuildOptions:
BuildOptions options = BuildOptions.AllowDebugging | BuildOptions.Development

When we removed the BuildOptions.AllowDebugging it was working again.

6

Facing this same issue on Linux when building for WebGL in development mode. 2019.2.5f1.

Anyone found a fix?

Edit: I found a fix, but it’s wierd. While WebGL is the selected target. I select Standalone and uncheck script debugging there. Somehow that affects WebGL even though it’s a different target.

1 Like
7

Also have this issue with 2019.3.0f5, solutions please?

Having this exact issue, building using scriptable pipeline, webgl debug target. I can’t debug my build because of this, huge blocker. The scripting debugging checkbox is disabled so couldn’t do the fix above.
Any solutions?

8

Same issue with 2019.3.13. Any solution for this?

9

It seems like only WebGL dev build is passing -s USE_PTHREADS=1 which in turn requires threading.h and posix_socket.h. I checked the folder Unity/Hub/Editor/2019.3.10f1/Editor/Data/PlaybackEngines/WebGLSupport/BuildTools/Emscripten/system/include/emscripten and it contains threading.h but not posix_socket.h

Reference: Pthreads support — Emscripten 3.1.65-git (dev) documentation

So I checked the version in PlaybackEngines/WebGLSupport/BuildTools/Emscripten/emscripten-version.txt and it is “1.38.11”. A look at emscripten’s repo shows that 1.38.11 indeed doesn’t have posix_socket.h, it was added in a big socket-related commit and can only be found in 1.39.5+

https://github.com/emscripten-core/emscripten/commit/31309a8c12aaf142ec483dbe3edc0aa195c1bbca

So basically, Unity’s il2cpp SocketBridge is using a feature from a version of emscripten more advanced than the one distributed with Unity 2019.3.10.

Unity/Hub/Editor/2019.3.10f1/Editor/Data/il2cpp/libil2cpp/os/Emscripten/SocketBridge.cpp

#include "il2cpp-config.h"

#if IL2CPP_TARGET_JAVASCRIPT
#include "os/SocketBridge.h"

#ifdef __EMSCRIPTEN_PTHREADS__
#include <emscripten/threading.h>
#include <emscripten/posix_socket.h>
#endif // __EMSCRIPTEN_PTHREADS__

namespace il2cpp
{
namespace os
{
    void SocketBridge::WaitForInitialization()
    {
#ifdef __EMSCRIPTEN_PTHREADS__
        EMSCRIPTEN_WEBSOCKET_T bridgeSocket = emscripten_init_websocket_to_posix_socket_bridge("ws://localhost:6690");
        // Synchronously wait until connection has been established
        uint16_t readyState = 0;
        do
        {
            emscripten_websocket_get_ready_state(bridgeSocket, &readyState);
            emscripten_thread_sleep(100);
        }
        while (readyState == 0);
#endif // __EMSCRIPTEN_PTHREADS__
    }
}
}

#endif // IL2CPP_TARGET_JAVASCRIPT

I will report a bug to Unity with this information.

10

I submitted the bug report and pointed them to this thread.

11

Still occurring in 2020.1

12

This worked. Disable script debugging.

13

This worked, with the issue still occurring in 2020.1.17

14

Ouch, this is an interesting bug. The history is that back last year, we added support to IL2CPP for Tiny Unity to debug C# scripts in WebGL builds. This script debugging requires a specific new version of Emscripten compiler.

IL2CPP is shared with classic Unity as well. But due to a number of technical dependencies, we do not use the same version of the Emscripten compiler with classic Unity that we use with Tiny Unity. This should not have been an issue, because classic Unity does not yet support Script Debugging in WebGL builds yet.

However now it looks of course that the option to enable Script Debugging for WebGL platform is still there in WebGL for classic Unity, and can be enabled, which will get a project build into trouble like this.

We need to fix this so that classic Unity will not try to activate this feature with the checkbox (either disable the checkbox for WebGL, or hide it altogether for WebGL). In the meanwhile, you can work around by manually unchecking Script Debugging. Apologies for this trouble, we should have caught this earlier!

2 Likes
15

Thanks, the workaround worked when using the Build Window!

However, I am using a custom Build script where I set all my Build options myself. I tried to find the equivalent of Script Debugging, which I thought to be BuildOptions.AllowDebugging, so I disabled that for WebGL dev build, but I get a different result: the build completes and I do not get the emscript posix_socket.h error indeed, however the game itself fails to run. When loading progress bar is around 90% I get a popup:

Closing the popup lets the progress bar reach 100% but then nothing happens.

and if I close this and reopen the index.html by myself to avoid any connection with Unity, I get another error popup:

Now this may be something related to my project, I’d need to build a blank project to be sure.
For now I will exclusively build WebGL dev build via the Build Window. WebGL release builds should be fine via script.

16

The error here is that you are attempting to run the web page by double-clicking or drag-n-dropping the file to the browser. That is not supported by web browsers due to security reasons. You’ll need to set up a local ad hoc web server if you want to run outside the Unity “Build And Run” button. See this thread for example: WebGL: "both async and sync fetching of the wasm failed". Build and runs works, fails when uploading

(esp. comments WebGL: "both async and sync fetching of the wasm failed". Build and runs works, fails when uploading - Unity Engine - Unity Discussions and WebGL: "both async and sync fetching of the wasm failed". Build and runs works, fails when uploading - Unity Engine - Unity Discussions )

1 Like