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Update README.md for Build on Mac #6

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Jul 13, 2024
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Update README.md for Build on Mac #6

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23 changes: 23 additions & 0 deletions README.md
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Expand Up @@ -51,6 +51,29 @@ We need to add some code into `src/main.rs`.

## Build and run it

<details>

<summary> Note on Mac </summary>

> `ring v0.17` can't build on Mac with default clang.
> So, you need install wasi-sdk.

### [Download wasi-sdk](https://github.com/WebAssembly/wasi-sdk?tab=readme-ov-file#install)
```
export WASI_VERSION=22
export WASI_VERSION_FULL=${WASI_VERSION}.0
wget https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-${WASI_VERSION}/wasi-sdk-${WASI_VERSION_FULL}-macos.tar.gz
tar xvf wasi-sdk-${WASI_VERSION_FULL}-macos.tar.gz
```

### [Use the clang included in wasi-sdk for compilation.](https://github.com/WebAssembly/wasi-sdk?tab=readme-ov-file#use)
```
export WASI_SDK_PATH=`pwd`/wasi-sdk-${WASI_VERSION_FULL}
export CC="${WASI_SDK_PATH}/bin/clang --sysroot=${WASI_SDK_PATH}/share/wasi-sysroot"
```

</details>

First we need to compile the code. You will need to pass some flags to make sure that the Rust compiler knows to use the correct patches for the `wasmedge` target.

```bash
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