[Pkg-javascript-devel] Bug#975069: Bug#975069: emscripten: Incompatibilities with LLVM 11

[Jonas Smedegaard]

Quoting Sébastien Jodogne (2020-11-18 20:49:27)
> I think there will be other topics to be discussed,

Indeed.  Please file separate bugreports for each topic.


>>> When building a large C++ project using the current package, the 
>>> WebAssembly linking might fail with error "emscripten:ERROR: 
>>> emscript: failure to parse metadata output from 
>>> wasm-emscripten-finalize".
>> 
>> Which exact options passed to wasm-emscripten-finalize?
>
> After inspection of "/usr/share/emscripten/emscripten.py", the options are:
> 
> ['--detect-features', '--minimize-wasm-changes', '--dyncalls-i64',
> '--global-base=1024']
> 
> You'll find the error log attached to this mail.
> 
> Note how "wasm-emscripten-finalize" produced an invalid JSON file: It
> contains percents that are not properly escaped. From what I see on a
> working emsdk deployment, no function starting with "__invoke" in the
> "declares" section should be present.

Thanks for those details.

That log was using the experimental package and local config, right?

It would be helpful if you could share how far you got using the package 
in unstable instead, and no custom config.  I.e. using llvm-11.

Yes, I am aware that you already mention it doesn't work, but package in 
experimental was a _failed_ experiment to use newer emscripten (no 
Debian package supports LLVM 12, as you also found out).


 - Jonas

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

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