OCaml native-code linking behavior differs between local development and production environments

OCaml Native-Code Linking Behavior Discrepancy

When building OCaml applications with ocamlopt for production deployment, the resulting executables may exhibit different runtime behavior compared to local development builds. The OCaml compiler's native-code generation can produce statically linked binaries by default, but platform-specific linker configurations and available system libraries influence the actual linking behavior.

On macOS systems, ocamlopt may dynamically link to system libraries like libSystem.dylib even when static linking is expected, creating hidden dependencies that only surface in production environments with different library availability. This discrepancy becomes critical when the production environment lacks the specific version or configuration of system libraries present during development.

The OCaml build system's handling of library paths and runtime dependencies varies significantly based on whether libraries are installed via opam, system package managers, or local builds. This creates uncertainty about which libraries are truly embedded in the executable versus which are expected to be resolved at runtime.

The unresolved decision concerns OCaml's runtime linker behavior when encountering missing shared libraries - different operating systems fail at different stages or attempt varying fallback mechanisms that are not consistently documented across platform combinations.

• Does ocamlopt's static linking behavior account for all system library dependencies on macOS?
• How can one verify that an OCaml native-code executable has no runtime library dependencies beyond what is statically linked?
• Which OCaml compiler versions exhibit consistent cross-platform linking behavior regardless of system library availability?