JS crash: |ReferenceError: _dlopen is not defined|. about emscripten

[jn0]

It's on http://syntensity.com/static/python.html

[kzigadlo]

I've noticed that this error no longer appears in the python demo, but I was messing around with the OPENjpeg demo (http://syntensity.com/static/openjpeg.html), and I got a similar issue when I tried to add some options to the command line string. Here is the modification:

try {
callMain(['-i', 'image.j2k', '-o', 'image.raw', '-l','3']);
} catch(e) {
alert(e.name + ": " + e.message);
}

instead of callMain(['-i', 'image.j2k', '-o', 'image.raw']); in j2k_to_image() (line 17). The error message is nearly identical:

 Reference Error: ___01__isoc99sscanf_ is not defined

Seems like a library import issue, but OPENjpeg imports the correct library, <stdio.h>. I tracked the function down in openjpeg.cc.js, and it is only used when either the '-l' or '-r' options are specified, which is why the code works in all other cases.

[max99x]

These are basically parts of the standard C library that are not yet implemented or not linked correctly to their implementations. dlopen() was recently implemented. ___01__isoc99sscanf_ should probably be linked to sscanf.

[kripken]

This should no longer be an issue since we moved to bundled headers (which avoid weirdness like ___01__isoc99sscanf_), but would require a rebuild of course so the online python demo might still not work. If you rebuild and it still fails please comment.