Fatal error: cannot load shared library dllunix

[cchampou]

Just ran into this error while trying to build project https://github.com/bsansouci/reprocessing-example.

Fatal error: cannot load shared library dllunix
Reason: dlopen(/Users/cchampouillon/.opam/default/lib/ocaml/stublibs/dllunix.so, 138): Symbol not found: _caml_ba_compare
  Referenced from: /Users/cchampouillon/.opam/default/lib/ocaml/stublibs/dllunix.so
  Expected in: flat namespace
 in /Users/cchampouillon/.opam/default/lib/ocaml/stublibs/dllunix.so

[poeschko]

Ran into the same problem (during the ReasonConf Dojo yesterday):

$ yarn run build
yarn run v1.13.0
warning package.json: No license field
$ bsb -make-world
[2/2] Building fake_src/sdl_index.mlast.d
[2/2] Building lib.cma
[4/4] Running build_script
Fatal error: cannot load shared library dllunix
Reason: dlopen(/Users/jpoeschko/.opam/4.07.1/lib/ocaml/stublibs/dllunix.so, 138): Symbol not found: _caml_ba_compare
  Referenced from: /Users/jpoeschko/.opam/4.07.1/lib/ocaml/stublibs/dllunix.so
  Expected in: flat namespace
 in /Users/jpoeschko/.opam/4.07.1/lib/ocaml/stublibs/dllunix.so
ninja: error: rebuilding 'build.ninja': subcommand failed
Failure: /Users/jpoeschko/Projects/reprocessing-example/node_modules/bsb-native/lib/ninja.exe
 Location: /Users/jpoeschko/Projects/reprocessing-example/node_modules/Tsdl/lib/bs/bytecode
error Command failed with exit code 2.

@bsansouci suggested removing some global opam-related setup from my ~/.zshrc, particularly

eval $(opam env)

which did solve the problem.

[cchampou]

Yep, the trick did finally work for me too !