Building and running with wasmtime
✅ You can build for the wasm32-wasi
manually like this:
cargo build --target wasm32-wasi
This should create a file target/wasm32-wasi/debug/rustagram.wasm
.
✅ Now that the application is built you can run it using wasmtime
:
wasmtime target/wasm32-wasi/debug/rustagram.wasm
You should see the message printed:
$ wasmtime target/wasm32-wasi/debug/rustagram.wasm
Hello World from wasmtime!
✅ (Optional) You can transform the generated WebAssembly code into its text representation using wasm2wat
wasm2wat target/wasm32-wasi/debug/rustagram.wasm
Caution: this produces a lot of output.
You should see something like this:
(module
(type (;0;) (func))
(type (;1;) (func (result i32)))
(type (;2;) (func (param i32)))
...
Try to identify your "Hello World" code.