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|Building SWI-Prolog using Emscripten for WebAssembly (WASM)|
As of version 8.1.2, building an executable for WASM is fully supported by the standard build process. The port is the work of Raivo Laanemets and related material can be found mostly on his GitHub pages.
You need to download the Emscripten compiler. Follow the instruction on its homepage.
After the successful installation load the Emscripten environment into the current terminal session (adjust path):
SWI-Prolog depends on zlib. To compile it to WebAssembly:
wget https://zlib.net/zlib-1.2.11.tar.gz -O "$HOME/zlib-1.2.11.tar.gz" tar -xf "$HOME/zlib-1.2.11.tar.gz" -C "$HOME" cd "$HOME/zlib-1.2.11" emconfigure ./configure emmake make
This will download and build zlib into the zlib-1.2.11 subdirectory in your home directory.
See CMAKE.md in the top directory of the sources.