I can't use the standard library in my dynamic side module no matter what I do, MAIN_MODULE=1 freezes the game.

[FireCatMagic]

So in my game, I load code dynamically through shared objects. I look up symbols dynamically via function names defined in a JSON file. Then once I have a generic function pointer, I cast it to the correct function pointer.

I compile my game code using MAIN_MODULE=2 and the side modules using SIDE_MODULE=2 to reduce dead code. All my functions that are loaded by the main module dynamically through the dlopen family of functions explicitly kept alive C symbols.

Aborted(Assertion failed: undefined symbol '_ZNSt12length_errorD1Ev'. perhaps a side module was not linked in? if this global was expected to arrive from a system library, try to build the MAIN_MODULE with EMCC_FORCE_STDLIBS=1 in the environment) [Vivescence.js:2655:6](http://localhost:6931/Vivescence.js)
error loading dynamic library Data/DataPack/Module/VivescenceModule.wasm: RuntimeError: unreachable executed [Vivescence.js:8158:8](http://localhost:6931/Vivescence.js)
�[31m[Default Error] �[00m�[35mSource\Data\Module.cpp�[00m �[36mModule:16�[00m Condition �[33m!shared_object�[00m is true. �[33mFailed loading Data/DataPack/Module/VivescenceModule.wasm: could not load dynamic lib: Data/DataPack/Module/VivescenceModule.wa�[00m Executing statement �[32mreturn;�[00m [Vivescence.js:4567:12](http://localhost:6931/Vivescence.js)
�[31m[Default Error] �[00m�[35mSource\Data\Registry\ModuleRegistry.cpp�[00m �[36mregister_module:14�[00m Condition �[33m!module->is_valid()�[00m is true. Executing statement �[32mreturn;�[00m

I did what it said and tried that env thing. It didn't fix anything. I tried removing std vector stuff. Then it complains about the function used for the new operator... which makes no sense because obviously I use the new operator in my main game.

Ok, so MAIN_MODULE=2 doesn't work because it can't find the symbols for standard library stuff. So I try with MAIN_MODULE=1 and it just does this forever.

Freezes the entire tab and never starts the game.

Version of emscripten/emsdk:
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 6.0.8 (aeb6792)
clang version 24.0.0git (https:/github.com/llvm/llvm-project 4bfd08c2d769736841ae4f5705d76fa6daa39027)

Failing command line in full:
If this is compile or link-time failure please include the full failing command
along with its entire output.

Full link command and output with -v appended:
Even for runtime issues it helps a lot if you can include the full link command.
Adding -v to the link command will show all of the sub-commands run which
can help us diagnose your issue.

C:\Users\firec\Files\vivescence>scons platform=web
scons: Reading SConscript files ...
TOOLS loaded: ['gcc', 'g++', 'gnulink', 'ar']
File created at: C:\Users\firec\Files\vivescence\Source\Generated\BuildInfo.gen.cpp
CCFLAGS: ['-s', 'USE_PTHREADS=1', '-fwasm-exceptions', '-sUSE_FREETYPE=1', '-sUSE_HARFBUZZ=1', '-fPIC']
CXXFLAGS:
LINKFLAGS: ['-s WASM=1', '-s', 'USE_PTHREADS=1', '-s', 'ALLOW_MEMORY_GROWTH=1', '-s', 'PTHREAD_POOL_SIZE=Math.min(Math.max(parseInt(navigator.hardwareConcurrency),4),32)', '-s', 'ENVIRONMENT=web', '-s', 'EXPORTED_FUNCTIONS=_main', '-s', 'EXPORTED_RUNTIME_METHODS=requestFullscreen,ccall,cwrap', '-sMIN_WEBGL_VERSION=2', '-sMAX_WEBGL_VERSION=2', '-sGL_ASSERTIONS=1', '-sFORCE_FILESYSTEM=1', '-sFETCH=1', '-sUSE_FREETYPE=1', '-sUSE_HARFBUZZ=1', '-sMAIN_MODULE=2', '-fPIC', '-lidbfs.js', '--preload-file', 'C:\\Users\\firec\\Files\\vivescence/Build/Data@Data', '-fwasm-exceptions', '-sSTACK_SIZE=262144', '--shell-file', 'C:\\Users\\firec\\Files\\vivescence\\EmscriptenShell.html', '-gsource-map', '-sASSERTIONS=2', '-lwebsocket.js']
TOOLS loaded: ['gcc', 'g++', 'gnulink', 'ar']
Platform: win32
MSVC flag: None
emcmake cmake -B C:\Users\firec\Files\vivescence\CMake\Build -G Ninja -DPLATFORM=web -DCMAKE_C_FLAGS="-s USE_PTHREADS=1 -fwasm-exceptions -sUSE_FREETYPE=1 -sUSE_HARFBUZZ=1 -fPIC" -DCMAKE_CXX_FLAGS="" -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=OFF -DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded -G Ninja
emcmake: cmake -B 'C:\Users\firec\Files\vivescence\CMake\Build' -G Ninja -DPLATFORM=web '-DCMAKE_C_FLAGS=-s USE_PTHREADS=1 -fwasm-exceptions -sUSE_FREETYPE=1 -sUSE_HARFBUZZ=1 -fPIC' -DCMAKE_CXX_FLAGS= -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=OFF -DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded -G Ninja '-DCMAKE_TOOLCHAIN_FILE=C:\Users\firec\Files\emsdk-main\upstream\emscripten\cmake\Modules\Platform\Emscripten.cmake' '-DCMAKE_CROSSCOMPILING_EMULATOR=C:\Users\firec\Files\emsdk-main/node/24.19.0_64bit/node.exe' in directory C:\Users\firec\Files\vivescence
-- -DPLATFORM=web;-DCMAKE_C_COMPILER=C:/Users/firec/Files/emsdk-main/upstream/emscripten/emcc.exe;-DCMAKE_CXX_COMPILER=C:/Users/firec/Files/emsdk-main/upstream/emscripten/em++.exe;-DCMAKE_C_FLAGS=-s USE_PTHREADS=1 -fwasm-exceptions -sUSE_FREETYPE=1 -sUSE_HARFBUZZ=1 -fPIC;-DCMAKE_CXX_FLAGS=;-DCMAKE_BUILD_TYPE=Debug;-DBUILD_SHARED_LIBS=OFF;-DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded;-DCMAKE_TOOLCHAIN_FILE=C:\Users\firec\Files\emsdk-main\upstream\emscripten\cmake\Modules\Platform\Emscripten.cmake;-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=BOTH
-- Configuring done (0.6s)
-- Generating done (0.0s)
-- Build files have been written to: C:/Users/firec/Files/vivescence/CMake/Build
cmake --build C:\Users\firec\Files\vivescence\CMake\Build
ninja: no work to do.
scons: done reading SConscript files.
scons: Building targets ...
em++ -o Source\Generated\BuildInfo.gen.o -c -s USE_PTHREADS=1 -fwasm-exceptions -sUSE_FREETYPE=1 -sUSE_HARFBUZZ=1 -fPIC -DVIVESCENCE_DEBUG -DMBEDTLS_USER_CONFIG_FILE=\"MbedTLSConfig.hpp\" -DHALF_ENABLE_CPP11_CFENV=0 -DHALF_ENABLE_CPP11_USER_LITERALS=0 -DAS_MAX_PORTABILITY -DAS_USE_STLNAMES=1 -DSDL_STATIC -IExtern\Include -IExtern\FireCatMagic\Source -IExtern\FireCatMagic\Extern\Include -IExtern\FireCatMagic\Extern\angelscript\sdk\angelscript\include -IExtern\FireCatMagic\Extern\angelscript\sdk\add_on -IExtern\FireCatMagic\Extern\zstd\lib -ISource -IAPI -ICMake\Install\include -ICMake\Install\include\everest -ICMake\Install\include\mbedtls -ICMake\Install\include\psa -ICMake\Install\include\SDL3 -ICMake\Install\include\SDL3_mixer Source\Generated\BuildInfo.gen.cpp
em++ -o Build\Vivescence.html "-s WASM=1" -s USE_PTHREADS=1 -s ALLOW_MEMORY_GROWTH=1 -s PTHREAD_POOL_SIZE=Math.min(Math.max(parseInt(navigator.hardwareConcurrency),4),32) -s ENVIRONMENT=web -s EXPORTED_FUNCTIONS=_main -s EXPORTED_RUNTIME_METHODS=requestFullscreen,ccall,cwrap -sMIN_WEBGL_VERSION=2 -sMAX_WEBGL_VERSION=2 -sGL_ASSERTIONS=1 -sFORCE_FILESYSTEM=1 -sFETCH=1 -sUSE_FREETYPE=1 -sUSE_HARFBUZZ=1 -sMAIN_MODULE=2 -fPIC -lidbfs.js --preload-file C:\Users\firec\Files\vivescence/Build/Data@Data -fwasm-exceptions -sSTACK_SIZE=262144 --shell-file C:\Users\firec\Files\vivescence\EmscriptenShell.html -gsource-map -sASSERTIONS=2 -lwebsocket.js Source\Main.o Source\VivescenceMain.o Source\API\BlockBehavior.o Source\API\Registry.o Source\API\Variant.o Source\API\World.o Source\APIDefinitions\AudioGroup.o Source\APIDefinitions\HTTPRequest.o Source\Audio\AudioManager.o Source\Client\ClientSettings.o Source\Core\EntitySerialization.o Source\Core\Utility.o Source\Core\Input\InputManager.o Source\Core\Input\InputEvent\InputEvent.o Source\Core\Input\InputEvent\InputEventKey.o Source\Core\Input\InputEvent\InputEventMouseButton.o Source\Core\Input\InputEvent\InputEventMouseMotion.o Source\Core\Input\InputEvent\InputEventMouseWheel.o Source\Core\Input\InputMap\InputMap.o Source\Core\Input\InputReceiver\InputReceiver.o Source\Core\ProgramState\ProgramState.o Source\Core\ProgramState\ProgramStateLoading.o Source\Core\ProgramState\ProgramStateServerEditMenu.o Source\Core\ProgramState\ProgramStateTest.o Source\Core\ProgramState\ProgramStateTitleMenu.o Source\Core\ProgramState\ProgramStateWomb.o Source\Core\ProgramState\ProgramStateWorld.o Source\Core\ProgramState\ProgramStateWorldCreationMenu.o Source\Core\ProgramState\ProgramStateWorldEditMenu.o Source\Core\ProgramState\ProgramStateWorldSelectMenu.o Source\Core\Window\WindowV2.o Source\Core\World\ChunkData.o Source\Core\World\ChunkV2.o Source\Core\World\GenerateChunkData.o Source\Core\World\LightPropagationManager.o Source\Core\World\StorageGUIContext.o Source\Core\World\World.o Source\Core\World\WorldClient.o Source\Core\World\WorldGUIManager.o Source\Core\World\WorldProperties.o Source\Core\World\WorldServer.o Source\Core\World\ChunkSaveFormat\ChunkSaveFormat.o Source\Core\World\ChunkSaveFormat\ChunkSaveFormatV1.o Source\Core\World\ChunkSaveFormat\ChunkSaveFormatV2.o Source\Core\World\ECS\ApplyEntityLightSystem.o Source\Core\World\ECS\BleedSysten.o Source\Core\World\ECS\CameraSystem.o Source\Core\World\ECS\ChunkStatusSystem.o Source\Core\World\ECS\DecaySystem.o Source\Core\World\ECS\EntityChunkPartitioningSystem.o Source\Core\World\ECS\EntityControllerSystem.o Source\Core\World\ECS\EntityModelRendererManagerSystem.o Source\Core\World\ECS\FollowSystem.o Source\Core\World\ECS\GravitySystem.o Source\Core\World\ECS\HUDSystem.o Source\Core\World\ECS\InputStateSystem.o Source\Core\World\ECS\InteractionSystem.o Source\Core\World\ECS\NaturalSpawningSystem.o Source\Core\World\ECS\PhysicsSystem.o Source\Core\World\ECS\RegenerationSystem.o Source\Core\World\ECS\RenderHoveredBlockSystem.o Source\Core\World\ECS\RotationSystem.o Source\Core\World\ECS\SpeedSystem.o Source\Core\World\WorldSystem\CameraSystem.o Source\Core\World\WorldSystem\ChunkManagementSystem.o Source\Core\World\WorldSystem\EntityModelRendererManagementSystem.o Source\Core\World\WorldSystem\HUDSystem.o Source\Core\World\WorldSystem\InputStateSystem.o Source\Core\World\WorldSystem\InteractionSystem.o Source\Core\World\WorldSystem\PhysicsSystem.o Source\Core\World\WorldSystem\RenderFocusedBlockSystem.o Source\Data\Block.o Source\Data\BlockModelConfiguration.o Source\Data\BlockModelConfigurationInformation.o Source\Data\DataPackManager.o Source\Data\EntityModel.o Source\Data\EntityTemplate.o Source\Data\Font.o Source\Data\Module.o Source\Data\TextureAtlasV2.o Source\Data\TextureV2.o Source\Data\Registry\AudioGroupRegistry.o Source\Data\Registry\AudioRegistry.o Source\Data\Registry\BlockBehaviorRegistry.o Source\Data\Registry\BlockModelRegistry.o Source\Data\Registry\BlockRegistry.o Source\Data\Registry\EntityComponentRegistry.o Source\Data\Registry\EntityComponentRegistryOLD.o Source\Data\Registry\EntityTemplateRegistry.o Source\Data\Registry\GenomeRegistry.o Source\Data\Registry\ItemBehaviorRegistry.o Source\Data\Registry\ItemPropertyRegistry.o Source\Data\Registry\ItemRegistry.o Source\Data\Registry\ModuleRegistry.o Source\Data\Registry\NativeEntitySystemRegistry.o Source\Data\Registry\RecipeRegistry.o Source\Data\Registry\ServerServiceRegistry.o Source\Data\Registry\TextureRegistry.o Source\Data\Registry\TraitRegistry.o Source\Data\Registry\WorldGenerationStepRegistry.o Source\Data\Registry\WorldGeneratorRegistry.o Source\Data\Registry\WorldSystemRegistry.o Source\Debug\Debug.o Source\Generated\BuildInfo.gen.o Source\Packet\Client\AuthenticatePacket.o Source\Packet\Client\SetAimNormalPacket.o Source\Packet\Client\SetLocalPlayerEntityComponentDataPacket.o Source\Packet\Client\SetMovementInputNormalPacket.o Source\Packet\Client\SetPressedActionFlagsPacket.o Source\Packet\Client\SetSelectedHotbarIndexPacket.o Source\Packet\Client\TrySendMessagePacket.o Source\Packet\Server\AddEntityComponentPacket.o Source\Packet\Server\BlockDestroyedPacket.o Source\Packet\Server\BlockPlacedPacket.o Source\Packet\Server\CreateEntityPacket.o Source\Packet\Server\DestroyEntityPacket.o Source\Packet\Server\LoadChunkPacket.o Source\Packet\Server\RemoveEntityComponentPacket.o Source\Packet\Server\SendMessagePacket.o Source\Packet\Server\SetChunkBufferIndexPacket.o Source\Packet\Server\SetChunkBufferRegionPacket.o Source\Packet\Server\SetEntityComponentDataPacket.o Source\Packet\Server\SetRemoteEntityPacket.o Source\Packet\Server\SetWorldPropertyPacket.o Source\Packet\Server\UnloadChunkPacket.o Source\Rendering\RenderingContext.o Source\Rendering\WorldRenderingManager.o Source\Rendering\Camera\Camera.o Source\Rendering\Camera\ControlledCamera.o Source\Rendering\Image\Image.o Source\Rendering\OpenGL\GLEBO.o Source\Rendering\OpenGL\GLUBOManager.o Source\Rendering\OpenGL\GLVAO.o Source\Rendering\OpenGL\GLVBO.o Source\Rendering\OpenGL\RenderingContextOpenGL.o Source\Rendering\Renderer\Renderer.o Source\Rendering\Renderer\BlockModelRenderer\BlockModelRenderer.o Source\Rendering\Renderer\BlockModelRenderer\BlockModelRenderer2D.o Source\Rendering\Renderer\BlockModelRenderer\BlockModelRenderer3D.o Source\Rendering\Renderer\BlockModelRenderer\BlockModelRendererBase.o Source\Rendering\Renderer\BoxOutlineRenderer\BoxOutlineRenderer.o Source\Rendering\Renderer\ChunkRenderer\ChunkRenderer.o Source\Rendering\Renderer\CloudsRenderer\CloudsRenderer.o Source\Rendering\Renderer\EntityModelRenderer\EntityModelRenderer.o Source\Rendering\Renderer\ItemModelRenderer\ItemModelRenderer2D.o Source\Rendering\Renderer\ItemModelRenderer\ItemModelRenderer3D.o Source\Rendering\Renderer\RectangleRenderer\NinePatchRenderer2D.o Source\Rendering\Renderer\RectangleRenderer\RectangleRenderer2D.o Source\Rendering\Renderer\SkyRenderer\SkyRenderer.o Source\Rendering\Renderer\TextRenderer\TextRenderer2D.o Source\Rendering\Shader\Shader.o Source\Rendering\Shader\ShaderProgram.o Source\Rendering\Texture\GLTexture.o Source\Service\Ezcha\ClientServiceEzcha.o Source\Service\Ezcha\EzchaBase.o Source\Service\Ezcha\ServerServiceEzcha.o Source\Service\Generic\ClientServiceGeneric.o Source\Service\Generic\ServerServiceGeneric.o Source\Tests\Tests.o Extern\FireCatMagic\Extern\mbedtls\library\base64.o Extern\FireCatMagic\Extern\mbedtls\library\md5.o Extern\FireCatMagic\Extern\mbedtls\library\platform_util.o Extern\glad\gl.o Extern\tinyobjloader\tiny_obj_loader.o Extern\stb_image_write.o Extern\stb_rect_pack.o Build\libGUI.a -LCMake\Install\lib Extern\FireCatMagic\libfirecatmagic.a -lSDL3 -lSDL3_mixer -lopusfile -lopus -logg

I'm not sure what I am supposed to do at this point. I can't use MAIN_MODULE=1 because it just freezes the tab and I can't play my game. Can't use MAIN_MODULE=2 because it can't load the side modules because of missing symbols.

[sbc100]

If you want to use -sMAIN_MODULE=2, which I highly recommend, you need to somehow link the main module so that it knows all the symbol it needs to include.

The simplest way to do that is to pass your side modules on the command line when you link the main module. e.g. emcc main.c -sMAIN_MODULE=2 libside.so. In this case you may also want to pass -sAUTOLOAD_DYLIBS=0 so the side modules are not loaded on startup. This allows the main module to know exactly which symbols from the standard library are needed. If you can't do that then you basically need to enumerate all of the symbols you need in a file and pass is using -sEXPORTED_FUNTIONS=@my_symbols.txt

[FireCatMagic]

If you want to use -sMAIN_MODULE=2, which I highly recommend, you need to somehow link the main module so that it knows all the symbol it needs to include.

The simplest way to do that is to pass your side modules on the command line when you link the main module. e.g. emcc main.c -sMAIN_MODULE=2 libside.so. In this case you may also want to pass -sAUTOLOAD_DYLIBS=0 so the side modules are not loaded on startup. This allows the main module to know exactly which symbols from the standard library are needed. If you can't do that then you basically need to enumerate all of the symbols you need in a file and pass is using -sEXPORTED_FUNTIONS=@my_symbols.txt

I've tried this, but the autoload flag doesn't seem to work as it should. Whenever I start my game, it immediately aborts.

Without the flag, obvious why it's aborting because it's trying to load it:

uncaught (in promise) Error: 404 : http://localhost:6931/VivescenceModule.wasm
    readAsync http://localhost:6931/Vivescence.js:2093
[Vivescence.js:2093:13](http://localhost:6931/Vivescence.js)

But WITH the flag it also doesn't work. It seems like it's trying to use an instance of the symbols from inside my shared library rather than actually making the main module have the symbols? Because this is my own internal library it's complaining about here.

Aborted(external symbol '_ZN12FireCatMagic7Vector2IfEC2Ev' is missing. perhaps a side module was not linked in? if this function was expected to arrive from a system library, try to build the MAIN_MODULE with EMCC_FORCE_STDLIBS=1 in the environment) [Vivescence.js:2663:6](http://localhost:6931/Vivescence.js)
Uncaught (in promise) RuntimeError: unreachable executed
    abort http://localhost:6931/Vivescence.js:2686
    __ZN12FireCatMagic7Vector2IfEC2Ev http://localhost:6931/Vivescence.js:7488
    initRuntime http://localhost:6931/Vivescence.js:2636
    run http://localhost:6931/Vivescence.js:17526

I really wish there was a way to make the side modules fully self contained, where they have their own copy of the used standard library functions and other stuff.

[FireCatMagic]

After doing hacks with #define ...

#define FireCatMagic __FIRE_CAT_MAGIC_INTERNAL

I managed to get rid of the symbols stuff from my own library.

But now this just happens when I load my module with dlopen.

Aborted(external symbol '_ZNSt3__216allocator_traitsINS_9allocatorIjEEE8max_sizeB9nqe220108IS2_TnNS_9enable_ifIX16__has_max_size_vIKT_EEiE4typeELi0EEEmRKS2_' is missing. perhaps a side module was not linked in? if this function was expected to arrive from a system library, try to build the MAIN_MODULE with EMCC_FORCE_STDLIBS=1 in the environment) [Vivescence.js:2663:6](http://localhost:6931/Vivescence.js)
worker: onmessage() captured an uncaught exception: RuntimeError: unreachable executed [Vivescence.js:2542:10](http://localhost:6931/Vivescence.js)
@http://localhost:6931/Vivescence.wasm:wasm-function[44602]:0xa5b299
abort@http://localhost:6931/Vivescence.js:2686:5
__ZNSt3__216allocator_traitsINS_9allocatorIjEEE8max_sizeB9nqe220108IS2_TnNS_9enable_ifIX16__has_max_size_vIKT_EEiE4typeELi0EEEmRKS2_@http://localhost:6931/Vivescence.js:7558:316
@http://localhost:6931/Vivescence.wasm:wasm-function[3574]:0x10d26e

[FireCatMagic]

I got my game to work with -O3, after using a #define hack to rename my internal library namespaces & after removing usage of std::vector, presumably because of the aggressive inlining. So my game now only will run with compiler optimizations enabled and no debugging.

... What's the point of side modules and dynamic linking if the code can't truly be self contained? Side modules are very useful as an idea to me, it lets me very easily split off my game's core engine code with the content data code. Plus, users could load additional content via a side module.

These hacks work for now, but they aren't sustainable. I'm not sure where I should go from here, I may have to change up how the architecture of my game works on web. On desktop platforms, I load content from dll files and dynamically search for the function symbol names based on content defined in JSON files. This architecture almost works perfectly here on wasm except for these linking symbols. Truly I just want my code side modules to be self contained.

[sbc100]

... What's the point of side modules and dynamic linking if the code can't truly be self contained? Side modules are very useful as an idea to me, it lets me very easily split off my game's core engine code with the content data code. Plus, users could load additional content via a side module.

You we correct that our version of dynamic linking with -sMAIN_MODULE=2 is limited since you need to know a-priori what symbols all your side modules will need.

This limitation is due to the fact that libc and libc++ are linked into the main module and have DCE run on them (i.e. in MAIN_MODULE=2 mode we don't include all of the libc/libc++ symbols).

If you need to load arbitrary side modules then just -sMAIN_MODULE=1 should work fine. I don't know of any issues with this mode other than that you will have large initial main module pay load. Can you explain more the failure you are seeing in this mode?

[FireCatMagic]

... What's the point of side modules and dynamic linking if the code can't truly be self contained? Side modules are very useful as an idea to me, it lets me very easily split off my game's core engine code with the content data code. Plus, users could load additional content via a side module.

You we correct that our version of dynamic linking with -sMAIN_MODULE=2 is limited since you need to know a-priori what symbols all your side modules will need.

This limitation is due to the fact that libc and libc++ are linked into the main module and have DCE run on them (i.e. in MAIN_MODULE=2 mode we don't include all of the libc/libc++ symbols).

If you need to load arbitrary side modules then just -sMAIN_MODULE=1 should work fine. I don't know of any issues with this mode other than that you will have large initial main module pay load. Can you explain more the failure you are seeing in this mode?

When i use MAIN_MODULE=1, this is what happens when I try to start my game:
https://github.com/user-attachments/assets/d2c96304-5afd-4764-9eed-3795c5fee6b1

No matter how long I leave it running, it never ends.

mainmodule1.zip

That build should allow you to observe the behavior.

[sbc100]

Perhaps you can use DevTools to figure what is causing MAIN_MODULE=1 not to work for you. We do have tests for that mode so we know it should work, so something unusual must be going on.

Can you try building with -sASSERTIONS=2 and maybe -sRUNTIME_DEBUG?

Can you look at the network debug pane to see if there are that all the expected assets loads correctly?

Can you share the full list of link flags you are using, so we can try to reproduce at our end?

Can you try building a simple hello world example with -sMAIN_MODULE=1?