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This adds the 'Hello World' example from here[0]. The runtime is in Rust
and the component is in C.
This requires some new tools
- https://github.com/bytecodealliance/wit-bindgen
- https://github.com/bytecodealliance/wasm-tools
You can use the pre-built packages, once downloaded and untar'd, edit
rust/hello_world/component/Makefile
and adjust the paths for the above tools.
To build the component with make you may need to specify where the WASI
sysroot is
$ make WASI_SYSROOT=/path/to/wasi-sysroot
[0]: <https://docs.rs/wasmtime/latest/wasmtime/component/macro.bindgen.html>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>
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