[bug] emscripten minimal example for embind fails when compiled with conan

[psarka]

Environment Details (include every applicable attribute)

• Operating System+version: Ubuntu 20.04.4 LTS
• Compiler+version: clang version 10.0.0-4ubuntu1
• Conan version: Conan version 1.47.0
• Python version: Python 3.8.10

Steps to reproduce (Include if Applicable)

I created a repro repository (make sure the branch is embind). It consits of the emscripten oscilator example with the conan definitions added to the best of my ability.

Unfortunately the best of my ability is not very good at all, so it is quite likely that I simply messed up.

Especially pay attention to the --bind flag in CMakeLists line 12, I may be passing it wrong. The official comand to compile the oscilator example (without conan) is using -lembind flag like this:

emcc -O2 -Wall -Werror -lembind -o oscillator.html oscillator.cpp

And it took me hours to find that maybe it has to be passed as --bind, as at least this way I can get it to compile (but not to run).

Logs (Executed commands with output) (Include/Attach if Applicable)

conan builds fine, using the commands in the README of the repo (or using build.sh). But the application does not function when
opened on the browser. The console log is as follows:

exception thrown: ReferenceError: ___getTypeName is not defined,getTypeName@http://0.0.0.0:8000/build/repro.js:1934:17
requireRegisteredType@http://0.0.0.0:8000/build/repro.js:1942:64
__emval_as@http://0.0.0.0:8000/build/repro.js:1948:20
@http://0.0.0.0:8000/build/repro.wasm:wasm-function[20]:0x8a1
@http://0.0.0.0:8000/build/repro.wasm:wasm-function[18]:0x4de
@http://0.0.0.0:8000/build/repro.wasm:wasm-function[91]:0x1e6c
createExportWrapper/<@http://0.0.0.0:8000/build/repro.js:1554:22
callMain@http://0.0.0.0:8000/build/repro.js:2708:28
doRun@http://0.0.0.0:8000/build/repro.js:2765:31
run@http://0.0.0.0:8000/build/repro.js:2780:5
runCaller@http://0.0.0.0:8000/build/repro.js:2686:19
removeRunDependency@http://0.0.0.0:8000/build/repro.js:1462:7
receiveInstance@http://0.0.0.0:8000/build/repro.js:1643:24
receiveInstantiationResult@http://0.0.0.0:8000/build/repro.js:1660:20

And then another one right after:

Uncaught (in promise) ReferenceError: ___getTypeName is not defined
    getTypeName http://0.0.0.0:8000/build/repro.js:1934
    requireRegisteredType http://0.0.0.0:8000/build/repro.js:1942
    __emval_as http://0.0.0.0:8000/build/repro.js:1948
    createExportWrapper http://0.0.0.0:8000/build/repro.js:1554
    callMain http://0.0.0.0:8000/build/repro.js:2708
    doRun http://0.0.0.0:8000/build/repro.js:2765
    run http://0.0.0.0:8000/build/repro.js:2780
    runCaller http://0.0.0.0:8000/build/repro.js:2686
    removeRunDependency http://0.0.0.0:8000/build/repro.js:1462
    receiveInstance http://0.0.0.0:8000/build/repro.js:1643
    receiveInstantiationResult http://0.0.0.0:8000/build/repro.js:1660

[perseoGI]

Greetings,

I apologize for the significant delay in addressing this issue.

The repository you created some time ago is no longer accessible on your GitHub profile. We have implemented native support for WebAssembly and the emcc compiler in Conan, which will be available later this week in the new release, version 2.18.

For more details, please refer to the pull request: #18432.

Additionally, we will soon launch a new repository called conan-toolchains (https://github.com/conan-io/conan-toolchains), where we will be adding and transitioning existing toolchains from CCI. One of these toolchains is emsdk (see conan-io/conan-toolchains#4), which is a refactor of the existing CCI recipe that we plan to deprecate.

We have also implemented proper support for the older asmjs architecture and tested all wasm architectures across different Conan generators, fixing some old bugs.

Please note that in the new conan-toolchains repository, we have added a conan_config folder that can be easily installed using the conan config install command. In this folder, we provide pre-built profiles for the respective toolchains.

Currently, we have the following profiles available:

• emsdk/asmjs
• emsdk/wasm32
• emsdk/wasm64

These profiles can be used alongside emsdk/native, which allows users to utilize their native emsdk installation instead of the Conan-packaged version.

I hope this meets your needs.

If the issue remains, do not hesitate to open a new issue with extra information.

Thank you and happy coding 🐸