ld: library not found for -llablgl about oplot HOT 9 CLOSED

I remember when I did the tests with the mac book, I was able to compile with dune build the examples in the "bin" directory. And of course it works in linux too. And in fact it must work with all the machines of the ocaml-CI they have when you submit a new package to opam, because the "bin" directory is part of oplot, hence it is built when compiling the library... (and they have a MacOS with homebrew, see https://opam.ci.ocaml.org/github/ocaml/opam-repository/commit/87c99fb064d7d85d8c519d992960063e583b7302)

What happens if you go to the "bin" directory and dune exec ./example.exe ?

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Maybe another mac issue like this one?

https://stackoverflow.com/questions/16682156/ld-library-not-found-for-lgsl

I can #require "lablgl" and open modules from it in an ocaml shell, so it seems installed ok.

opening modules is not enough, you need to actually call a function to have the C library loaded.
(on the other hand, since you are able to run the example in the toplevel, it means that lablgl is installed, because oplot uses openGL even for 2D plots. So that's very weird.)

Did you try to reinstall lablgl cleanly?

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another guess: did you make sure that dune build uses the same version of ocaml than your toplevel?

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Hi, thanks for your help. I guess it's something weird on my system but I'm not sure what to look for.

I did try deleting my switch and reinstalling everything from scratch, but no change.

https://stackoverflow.com/questions/16682156/ld-library-not-found-for-lgsl seems a very similar error. The confusing part there is that gsl is a package that installs via homebrew or macports, while lablgl is purely from opam.

I guess I need to add something to my LD_LIBRARY_PATH but I had a sniff around in ...opam-repository/packages/lablgl and didn't see anything that looked likely

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and yes if I go into the oplot/bin dir I can dune exec ./example.exe and it works fine

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and yes if I go into the oplot/bin dir I can dune exec ./example.exe and it works fine

that means that "dune build" does work!

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yes, I don't understand why it doesn't work in my own project

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turns out this was due to having (modes byte) in the dune file for my test suite, which I'd added for sake of running the tests with ocamldebug

after removing that it builds successfully

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I'm not sure but this might be a bug in dune...

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