new missing primitives since ocaml 4.01.0

[sagotch]

Hello js_of_ocaml team.

I used to have this "warning" when compiling my program with ocaml 4.00.0 :

Missing primitives:
  caml_ml_output_char

I upgraded to 4.01.0 via opam yesterday, and my program did not changed, but I now have those messages when compiling :

Missing primitives:
  caml_ml_output_char
  caml_sys_const_big_endian
  caml_sys_const_ostype_cygwin
  caml_sys_const_ostype_unix
  caml_sys_const_ostype_win32
  caml_sys_const_word_size

The problem is that caml_ml_output_char did not prevent my program from running well, but these new errors do.

Is it a known issue ? Did I forget to upgrade something ?

[kit-ty-kate]

Updates for ocaml 4.01.0 are only available, for the moment, in the devel version. We're planning to do a release (soon), but until, please use the devel version.

[sagotch]

Thank you, it worked for me (well, the application seems to run well in browser).
But I still have a missing primitive I do not understand :

Missing primitives:
  caml_ml_output_char
  pastek_core

pastek_core is the program in OCaml I compile using js_of_ocaml.
I did not find any doc about missing primitives errors, so I really have no idea about how to fix it.

[balat]

One of the libraries linked with your program is using these external functions. This is not a problem as long as you are not actually calling them. Otherwise, you need a JS version of these functions (in a separate js file included in your Web page, for example).

[hhugo]

When implementing javascript function, providing the javascript file to js_of_ocaml compiler will result in more optimization.

[Drup]

As a side note, what is the issue with implementing caml_ml_output_char exactly ? Having it would make the whole exception reporting far more easy for beginners. We could also avoid the confusing non-error message.

[vouillon]

I have added a dummy implementation of this function for now.

Indeed, we could buffer outputs performed using caml_ml_ouput and caml_ml_output_char and flush them to the console when caml_ml_flush is called (or after each '\n'). Is that what you had in mind? Do you want to contribute some code?

[Drup]

I didn't had anything in mind, since I don't know this part of the code at all, it's just that everything go wrong in a not very helpful way when ocaml try to print an exception.
I'm not very good with javascript, so I may try, but no promises.

[hhugo]

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