docs: Add wasm script generation doc

README.md

@@ -41,6 +41,8 @@ Prerequisites:
 
 - Open [src\Calculator.sln](/src/Calculator.sln) in Visual Studio to build and run the Calculator app.
 
+If building for WebAssembly fails, make sure to follow the notes in the `calculator/src/CalcManager/build.sh` file.
+
 ## Contributing
 We ❤ contributions. The team encourages community feedback and contributions. Please follow our [contributing guidelines](CONTRIBUTING.md).
 

src/CalcManager/build.sh

@@ -1,3 +1,14 @@
+# To run this script locally:
+# - if cloned from windows, ensure that line endings are `LF`
+# - under linux: cd to your_path\calculator\src\CalcManager
+# - under WSL: cd `wslpath "your_path\calculator\src\CalcManager"`
+# Execute the following:
+#   git clone --branch 2.0.23 https://github.com/emscripten-core/emsdk
+#   ./emsdk install 2.0.23
+#   ./emsdk activate 2.0.23
+#   source ./emsdk_env.sh
+# Navigate back to this file's folder in the same terminal
+
 mkdir -p bin/wasm
 
 echo Generating LLVM Bitcode files