ctypes-foreign name issue

[arnau]

The Foreign Function Interface chapter uses the ctypes-foreign library, installed using opam install ctypes-foreign. So far so good.

When using the library though, the examples use #require "ctypes-foreign" for utop and ctypes-foreign.threaded for dune:

(executable
   (name      ncurses)
   (libraries ctypes-foreign.threaded))

Which leads to the following error:

$ dune build ncurses.exe
File "dune", line 3, characters 13-36:
3 |   (libraries ctypes-foreign.threaded))
                 ^^^^^^^^^^^^^^^^^^^^^^^
Error: Library "ctypes-foreign.threaded" not found.
Hint: try: dune external-lib-deps --missing ncurses.exe

If instead I use ctypes.foreign.threaded it works fine.

I tried to fix the book but then the tests fail. I suspect it's because the ctypes version in the duniverse folder is out of date?

[avsm]

This is because there's a working snapshot of ctypes (from yallop/ocaml-ctypes#588) in that chapter at the moment. I'll work out these rough edges with the threaded/unthreaded variants over the next few weeks as that gets ready to merge upstream.

[peter-jerry-ye]

Hello,

I came across the same issue the other day and I found this issue is still open.

May I ask if there's going to be an update? Because it can be misleading if one were following the example from scratch instead of cloning directly the book.

Thanks.