Skill: Build WASM

Build the WASM module from C++ sources and verify the output.

Usage

• •/build-wasm — standard build
• •/build-wasm clean — clean previous artifacts first

Steps

1. •

   If clean argument provided:

   bash

   rm -rf build/
   

2. •

   Run the WASM build:

   bash

   npm run build:wasm
   

3. •

   Verify output files exist:

   bash

   ls -la public/zxspec.js public/zxspec.wasm
   

4. •

   Count exported functions in the build:

   bash

   grep -c 'EMSCRIPTEN_KEEPALIVE' src/bindings/wasm_interface.cpp
   

5. •

   Report build status:

   • •Success/failure
   • •Output file sizes
   • •Number of exported functions
   • •Any warnings from the build

Troubleshooting

If the build fails:

• •Check that Emscripten SDK is activated (source emsdk_env.sh)
• •Verify ROM files exist in roms/ directory (48.rom required)
• •Check for C++ compilation errors in the output
• •Ensure build/ directory can be created