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Add note about web builds compiling with emscripten #167

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5 changes: 5 additions & 0 deletions samples/12_c_extensions/01_basics/README.md
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Expand Up @@ -69,6 +69,11 @@ DragonRuby ships with support for Android on arm32, arm64, x86, and x86-64. This
be overkill, but it allows for maximum hardware compatibility. You should plan to
compile for all four architectures too, but of course this is optional.

### Web

Web builds are automatically compiled with WASM using [emscripten](https://emscripten.org/). As long as emscripten can compile your C extension to WASM, your C extension will work as expected without needing to precompile any binaries.

To see the list of things to do to prepare your C code for emscripten compilation, check out this page: <https://emscripten.org/docs/porting/index.html#integrating-porting-index>

## Hello World

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