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Add beginner-level documentation for installation and use #107

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Apr 3, 2020
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Add beginner-level documentation for installation and use #107

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18 changes: 18 additions & 0 deletions README.md
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Expand Up @@ -24,6 +24,24 @@ One could also use a standard Clang installation, build a sysroot from the
sources mentioned above, and compile with
"--target=wasm32-wasi --sysroot=/path/to/sysroot".

## Install

A typical installation from the release binaries might look like the following:
```shell script
wget https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-[VERSION]/wasi-sdk-[VERSION]-linux.tar.gz
tar xvf wasi-sdk-[VERSION]-linux.tar.gz
```

## Use

Use the clang installed in the wasi-sdk directory:
```shell script
CC="[WASI_SDK_PATH]/bin/clang --sysroot=[WASI_SDK_PATH]/share/wasi-sysroot"
$CC foo.c -o foo.wasm
```
Note: `[WASI_SDK_PATH]/share/wasi-sysroot` contains the WASI-specific includes/libraries/etc. The `--sysroot=...` option
is not necessary if `WASI_SDK_PATH` is `/opt/wasi-sdk`.

## Notes for Autoconf

Upstream autoconf now
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