no native wasm support detected- hello_world.c

[parulkhanna]

Hi,

I am using Binaryen & Emscripten on MACOSX. Whenever I try to compile with native-wasm method. I get following error at time of execution.

`Paruls-MacBook-Pro:incoming parulkhanna$ ./emcc hello_world.c -s BINARYEN=1 -s 'BINARYEN_METHOD="native-wasm"' -s 'BINARYEN_SCRIPTS="spidermonkify.py"' 
Paruls-MacBook-Pro:incoming parulkhanna$ node a.out.js 
trying binaryen method: native-wasm
no native wasm support detected

/Users/parulkhanna/Desktop/emsdk_portable/emscripten/incoming/a.out.js:425
      throw ex;
      ^
no binaryen method succeeded

Also, if I generate .wasm .wast using simple BINARYEN=1 flag. How I can use polyfil to execute wasm files in browser.

Any help will be appreciated, Thanks.

[kripken]

Node.js doesn't have wasm support yet. When it gets a recent enough v8 it might work with a flag. Otherwise, you can use trunk builds of v8 or spidermonkey, or use a nightly build of firefox or chrome with a flag.

[parulkhanna]

Hi,

Thanks for the reply. Can you please provide me the steps how to do that. I am unable to find a method.

Otherwise, you can use trunk builds of v8 or spidermonkey, or use a nightly build of firefox or chrome with a flag.

Thanks,

[kripken]

For example, you can get firefox nightly here, and then open about:config and look for a pref with wasm in the name, and turn it on.

[parulkhanna]

Hi,

Can you provide me with the steps on how I can run wasm file in browser. I am not getting the explanation on this link https://github.com/WebAssembly/polyfill-prototype-1.
thanks,

[kripken]

Instead of running the js file in node, you can run it in a browser by creating an html file that contains a script tag whose source is that js file.

[parulkhanna]

Hi, I used the following command and still got the same error. (screenshot attached)

`./emcc hello_world.c -s BINARYEN=1 -s "BINARYEN_METHOD='native-wasm'" -s 'BINARYEN_SCRIPTS="spidermonkify.py"' -o helloworldy.html

[kripken]

Is that with firefox nightly, and with the pref I mentioned?

If it is, then something else must be wrong but I have no idea what. You can debug in the source code, search for that error message, then read the code around it, and you will see what it is looking for that it can't find, that leads to the error being printed.