September 2018
Intermediate to advanced
328 pages
9h 10m
English
Content preview from Learn WebAssembly
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Outputting HTML with glue code
If you specify an HTML file extension (for example, -o with-glue.html) for the output, you'll end up with a with-glue.html, with-glue.js, and with-glue.wasm file (assuming you also specified -s WASM=1). If you have a main() function in the source C/C++ file, it'll execute that function as soon as the HTML loads. Let's compile our example C code to see this in action. To compile it with the HTML file and JavaScript glue code, cd into the /chapter-05-create-load-module folder and run the following command:
emcc with-glue.c -O3 -s WASM=1 -s USE_SDL=2 -o with-glue.html
The first time you run this command, Emscripten is going to download and build the SDL2 library. It could take several minutes to complete this, ...
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