build: support emscripten compiler for cgo on wasm

[gucio321]

Hi there!
In reference to #40543

is cgo will support for wasm in future?

very unlikely as you would need a C to wasm compiler for you C dependencies.

I'm going to close this question as answered based on the answer from @randall77 above.

After a while of googling I found that C to wasm compiler already exists: https://emscripten.org/index.html

Is it possible to make CGO support webgl build target and allow to specify compiler e.g. with CC="..." and CXX="..." ?

[ianlancetaylor]

This is not a proposal. Turning into a normal issue.

It may be possible, but somebody would have to do the work.

[ianlancetaylor]

CC @neelance

[gucio321]

Thank you for your information! Looking forward to seeing this feature implemented in the future release of go!

[neelance]

Seems possible in theory, but very unlikely to happen. I think you should rather try to compile your Go code and C code to WebAssembly separately, load both in the same WebAssembly environment and then connect them somehow.

[gucio321]

@neelance could you please provide some step-by-step tutorial about that?

[neelance]

Not really. The "somehow" meant that I don't know how exactly to do it, just that I think it should be possible.

[gucio321]

Are there any updates/plans for that? I'm looking forward to see this feature as I really need it 😕