[WIT] Tinygo support

[maxence-charriere]

summary

This is a try to support tiny go.

status

• It compiles
• Compile-time is way too long (around 1 min)
• wasm binary size gain is about 40%
• It fails to load wasm file in the browser

  loading wasm failed: LinkError: WebAssembly.instantiate(): Import #15 module="env" function="time.resetTimer" error: function import requires a callable
  

• os.Getenv/os.Setenv are not supported
• Require to have separated main for wasm and server

[mar1n3r0]

tinygo-org/tinygo#2350

Don't give up the SetEnv implementation is already in dev branch soon to be merged to master and released. It's more of a camel race rather than one push :)

Please see the thread where the wasm runs in the browser: #534

[oderwat]

I am at the same point with my slightly different approach: The so the next (last?) problem is tinygo-org/tinygo#1037.

[alvarolm]

I am at the same point with my slightly different approach: The so the next (last?) problem is tinygo-org/tinygo#1037.

runtime timers are now implemented (since 0.26.0)
tinygo-org/tinygo#1037 (comment)

also wasm binary size could be reduced even further
https://www.fermyon.com/blog/optimizing-tinygo-wasm

the compile time still is slower

considering the resulting (tinygo) wasm binary size could be less than the go compiler after optimizations, may be its a choice for production build only ?

current output with getting started application:

$  tinygo build -o web/tiny.wasm -target wasm .
tinygo:wasm-ld: error: /tmp/tinygo2210282389/main.o: undefined symbol: time.modTimer
failed to run tool: wasm-ld
error: failed to link /tmp/tinygo2210282389/main: exit status 1

[gedw99]

same with me still

tinygo build -o web/app.wasm -target wasm ./main.go
tinygo:wasm-ld: error: /var/folders/wp/ff6sz9qs6g71jnm12nj2kbyw0000gp/T/tinygo1510053506/main.o: undefined symbol: time.modTimer
failed to run tool: wasm-ld