How to passing char* arr[] to JavaScript in EM_JS?

[iliakan]

Here's my (incorrect) attempt to implement execve:

EM_JS(int, execve, (const char *pathname, char *const argv[], char *const envp[]), {
  return Module.execve(pathname, argv, envp);
});

It doesn't work, because the generated JS code in module file looks like this:

function execve(pathname,argv[],envp[]) { return Module.execve(pathname, argv, envp); }

(The problem is that [] in function arguments cause syntax error in JS)

How should I implement it correctly?

P.S. I tried to use char **const argv, char **const envp as arguments (instead of *...[]), but then the signature doesn't match, and the compilation fails.

[sbc100]

We should probably be stripping those off yes. You should be able to two * instead though. e.g.:

EM_JS(int, execve, (const char *pathname, char ** argv, char ** envp), {
  return Module.execve(pathname, argv, envp);
});

However if you just want to call into en external JS function you might want to consider using --js-library file, and skip the whole EM_JS macro.