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# webassembly
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Lei Lei
11/06/2023, 7:56 AMQuestion about Kotlin/Wasm, I tried Kotlin/Wasm examples in github, however wabt(Wasm binary toolkit) says the generated wasm binary has problems, and it is failed to be loaded by non-browser wasm VMs, e.g. wasm3.
This youtube mentioned there is a plan to support other wasm VMs, I thought the wasm binary should be same for all VMs, no matter if it is browser VMs or not, is it true?
And I am curious what is missing to support non-browser wasm VMs. e.g. wasm3.
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ephemient
11/06/2023, 8:13 AMwabt and wasm3 do not not support gc yet
nodejs does, but its version of v8 is out of date and doesn't support the correct gc opcodes
eventually they should catch up with the current wasm spec and things should work, but until then, you are limited in terms of which runtimes kotlin/wasm will run on
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Lei Lei
11/06/2023, 9:05 PMGot it, thanks for the explanation!
Is Kotlin/Wasm limited to Wasm runtimes with GC support, e.g. V8?
The video mentioned that Kotlin/Wasm plans to support other VMs, I am wondering what is missing to support other VMs, e.g. wasme, wasmedge. Is it the changes in Kotlin/Wasm compiler side or the runtime side to support GC?
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ephemient
11/06/2023, 9:27 PMit's on the runtime side to support the final wasmgc spec
well, there's also work on the Kotlin side to better support WASI and other ways to make use of the runtime
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Lei Lei
11/07/2023, 5:12 PMGot it, thanks!
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