Emscripten without Node.js?

[Anton Smirnov]

Hi. I've reviewed py files and i can see Node invocations are used even when compiling .html output. Invocations like:

['/softdev/emscripten_portable/node/0.10.18_64bit/bin/node', '/Users/asmirnov/Documents/dev/src/emscripten/src/compiler.js', '/var/folders/64/fwfkm1k51zbd4_c5lwpsbljh0000gn/T/tmpCfQczG.txt', ';', 'glue']

and

['/softdev/emscripten_portable/node/0.10.18_64bit/bin/node', '/Users/asmirnov/Documents/dev/src/emscripten/tools/source-maps/sourcemapper.js', '/var/folders/64/fwfkm1k51zbd4_c5lwpsbljh0000gn/T/tmpuoub24/hw.bc.o.js', '--sourceRoot', '/Users/asmirnov/Documents/dev/src/emscripten', '--mapFileBaseName', '/tmp/hw.html', '--offset', '0']

I've noted Node executable path is passed in "compiler_engine" variable. What are another compiler engines possible?

Can replace/workaround it for a platform which does not have Node.js implementation (ios f.e.)? I mean i'd like to convert .cpp to .js right on ios.

[Anton Smirnov]

I've found Node.js implementation for ios:

https://github.com/node-app

What is said to be working (https://github.com/node-app/Nodelike#whats-working-right-now):

• console.log()
  
• process: .argv, .env, .exit(), .nextTick()
  
• require()
  
• fs
  
• net
  
• http
  
• timers
  
• util
  
• url
  
• events
  
• path
  
• stream
  
• querystring
  
• punycode
  
• assert
  

Is it suitable? I believe IOS has a lot of limitation so will emscripten .js scripts work on ios? With this Node.js impl?

[Anton Smirnov]

BTW. Why isn't LLVM->JS convertion implemented in Python just other files?

[Alon Zakai]

You can change COMPILER_ENGINE in ~/.emscripten. It should work with either node, the spidermonkey shell, or the v8 shell. Not tested on the jsc shell.

We have that part of the compiler in JS for historical reasons, it's older code.

- Alon

On Thu, Sep 25, 2014 at 5:07 AM, Anton Smirnov <d...@antonsmirnov.name> wrote:

BTW. Why isn't LLVM->JS convertion implemented in Python just other files?

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[Anton Smirnov]

Thanks.

[Mark Callow]

On 26/09/2014 08:10, Alon Zakai wrote:

We have that part of the compiler in JS for historical reasons, it's older code.

I thought fastcomp had replaced all the JS. Which part is still in JS?

Regards

    -Mark

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[Alon Zakai]

emscripten.py will call the JS compiler to emit the JS library code and a little other stuff (like some necessary polyfill code). We've been moving more and more stuff out (e.g. SIMD moved out recently).

- Alon

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