Kotlin-native: WASM target for Linux host

[zaggy]

Hi,

I noticed that WASM target had been added to the konanc compiler, but on Linux it throws an error. I would love to help on adding ability to build kotlin for WASM target on Linux but I am not very sure where to start and how do you treat third-party PRs.

Can anyone point me in the proper direction? I am ready to tackle Kotlin/Java or C++ code, just need to know where to start.

[olonho]

It shall be pretty straightforward, just build a WASM toolchain for Linux (see https://github.com/JetBrains/kotlin-native/blob/master/contrib/binaryen.diff), and specify that WASM is supported near https://github.com/JetBrains/kotlin-native/blob/5d4d57949055778f3c79071d390daa7397f68cb5/shared/src/main/kotlin/org/jetbrains/kotlin/konan/target/KonanTarget.kt#L164

[sdeleuze]

:+1: For Linux WASM support!

[napperley]

The s2wasm.h file doesn't exist in the Kotlin Native distribution.

[napperley]

Found a pre-built Linux WASM toolchain. Curiously the toolchain is accompanied by torture files. In the toolchain file LLVM 6.0 is used, will that be an issue with Kotlin Native?

How is a pre-built toolchain (from a compressed file - eg deb) installed in the Kotlin Native distribution?

[vvlevchenko]

fixed in master, will be available for public soon