I recently meet this problem:
/home/akochkov/.opam/default/bin/ocamlfind ocamlopt -g -linkpkg -package ctypes.stubs -I src src/zstd_stubs.cmx src/zstd_gen.cmx -o src/zstd_gen.native /usr/bin/ld: cannot find -lintegers collect2: error：ld returned 1 exit status. File "caml_startup", line 1: Error: Error during linking
I met it during compiling zstd library a month ago, but recently also see the same on some internal libraries too.
See opam-repository zstd bug.
What can I do to avoid this, at least temporarily?
I believe it started in integers-0.3.0 release: https://github.com/ocamllabs/ocaml-integers/releases/tag/0.3.0