Compiling a Freepascal project for the browser using Emscripten

Prerequisites

  • Build freepascal for the wasm32-embedded target

  • (The hard part) Implement the memory and I/O functions needed by the Freepascal runtime

Building your project

  • Compile your project. Your top-level unit should be unit, not program

  • Compile the backend.

  • Use emcc to compile and link:

    • all of the object files created by FPC, including your project and backend
    • Some object files from the RTL
    • Raylib library (compiled for wasm)