ctypes is hidden (unsatisfied 'exist_if') error when using dune on wsl

Question

I am using wsl ubuntu on my windows 10 machine and am trying to build an ocaml project(https://github.com/adamrk/llvm-ocaml-tutorial) using dune. Unfortunately, i am getting this error:

# dune build bin/kaleidoscope.exe
File "/home/impor/.opam/4.10.0/lib/ctypes/META", line 1, characters 0-0:
Error: Library "ctypes.foreign.threaded" in
/home/impor/.opam/4.10.0/lib/ctypes is hidden (unsatisfied 'exist_if').
-> required by library "ctypes.foreign" in
   /home/impor/.opam/4.10.0/lib/ctypes
-> required by executable kaleidoscope in bin/dune:2
Hint: try: dune external-lib-deps --missing bin/kaleidoscope.exe

I couldn't find any documentation about this so I am very lost.

# dune external-lib-deps --missing bin/kaleidoscope.exe

does nothing

What did you do to install dependencies? What is the output of `opam list`? Did you install opam package `conf-pkg-config`? Is `ctypes-foreign` installed? — antron, Apr 05 '20 at 07:28
ctypes-foreign was not installed. Installing it fixed this. Thank you. — Devon Rutledge, Apr 05 '20 at 09:32

score 2 · Accepted Answer · answered Apr 05 '20 at 13:07

2

This is due to not having opam package ctypes-foreign installed.

answered Apr 05 '20 at 13:07

antron

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ctypes is hidden (unsatisfied 'exist_if') error when using dune on wsl

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