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→Update build instructions
== Building ==
=== 1. Install emscripten ===
First, you need to install emscripten, which is a compiler toolchain for WebAssembly.
=== = 1.1. Get the emsdk repo ====
<code>
git clone https://github.com/emscripten-core/emsdk.git
</code>
=== = 1.2. Enter that directory ====
<code>
cd emsdk
</code>
=== = 1.3. Download and install the latest SDK tools ====
<code>
./emsdk install latest
</code>
=== = 1.4. Make the "latest" SDK "active" ====
<code>
./emsdk activate latest
</code>
=== = 1.5. Activate PATH and other environment variables ====
<code>
source ./emsdk_env.sh
</code>
=== = 1.6. Now just try it! ====
<code>
emcc
</code>
'''Tip:''' If you get an error with "undefined symbol: saveSetjmp/testSetjmp" at the build step, revert to:
<code>
./emsdk install 3.1.56 && ./emsdk activate 3.1.56 && source ./emsdk_env.sh
</code>
