On Wed, Nov 12, 2014 at 9:17 AM, Alex Buchanan <[email protected]> wrote:
> Hey all.
>
> I'm toying around with writing a programming language. So far, I've
> decided to utilize LLVM for code generation. Then I thought, hey, wouldn't
> it be cool if I could compile to JS too? That would make my language usable
> in the browser!
>
People have experimented with this in the past. I'm not sure if any have
had success or not.
> Enter emscripten. I was hoping I could just run emscripten on the LLVM IR
> I've produced, and magically it would run in the browser. However, as far
> as I can tell, emscripten is targeted primarily at C/C++. This line from
> the docs makes me think that emscripten does not support arbitrary LLVM IR:
>
> "Do not attempt to bypass *emcc* and call the Emscripten tools
> directly from your build system."
>
What that means is that you should not try calling the underlying
emscripten.py and other tools directly. emcc can take a bitcode file, so
you don't have to feed it C / C++.
emcc whatever.bc -o whatever.html
You'll want to make sure that you build your bitcode for the right target
and with the right data layout.
Good luck,
- Bruce
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