In general it is not possible to swap the JS and wasm files that emscripten
generates.  The JS is highly specific to the wasm module, and not portable
between wasm modules.

IIRC many folks have had success compiling skia to wasm already.  Have you
looked at https://skia.org/docs/user/modules/canvaskit/?


On Thu, Oct 13, 2022 at 10:21 AM Sohan Jyoti Ghosh <[email protected]>
wrote:

> Thanks for getting back.
>
> On Thu, Oct 13, 2022 at 7:29 PM 'Sam Clegg' via emscripten-discuss <
> [email protected]> wrote:
>
>> Can you share the full link command you are using?
>>
>> So, we are trying to build the simple skia hello_world c++ app via wasm,
> to be playable inside the browser.
> We are trying to setup the SDL2 backend for skia with
> https://skia-review.googlesource.com/c/skia/+/573643
>
> Here, is our build command for hello_world.wasm, which internally invokes
> emscripten toolchain
> *bazel build //example:hello_world_wasm
> --noincompatible_enable_cc_toolchain_resolution*
>
> Can you take a look at the generated JS file?  Do you see the
>> `_embind_register_void` function in that file?  It should be defined as a
>> function then added to the `asmLibraryArg` object which gets passed to
>> instantiate.
>>
>> The generated JS file (
> https://gist.github.com/sohanjg/a38f509275b84279e98c097c81c9b5e2) doesnt have
> `_embind_register_void`. Also the originally generated files somehow
> wasn't able to load the wasm without throwing errors. So, we changed an
> existing simple emscripten generated helloworld.js (which was almost
> identical) to refer to the wasm generated by skia.
>
> cheers,
>> sam
>>
>> Br,
> Sohan
>
>> On Thu, Oct 13, 2022 at 7:30 AM Sohan Jyoti Ghosh <[email protected]>
>> wrote:
>>
>>> Hi !
>>>
>>> I am getting errors while instantiating Array Buffer,
>>> * WebAssembly.instantiate(binary, info)*
>>>
>>> The error is,
>>> *"Uncaught (in promise) RuntimeError: Aborted(LinkError:
>>> WebAssembly.instantiate(): Import #1 module="env"
>>> function="_embind_register_void" error: function import requires a
>>> callable)"*
>>>
>>> Any pointers, how "env" obj is missing the function ? And how to resolve
>>> it ? I am using the JS template coming out of emscripten.
>>> Is there some error in building the .wasm ?  Nothing is reported on the
>>> build log though.
>>>
>>> Br,
>>> Sohan
>>>
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