912a825d1e
When building PostgreSQL with plugins under NixOS, NixOS will create a postgresql-and-plugins directory which symlinks PostgreSQL and all the plugins into a single directory. Unfortunately, the plugins will not actually be usable by PostgreSQL because it will still try and locate them in the original PostgreSQL share directory, not postgresql-and-plugins. In this commit, I have patched resolve_symlinks to always return success, which matches the behavior if HAVE_READLINK is false (so presumably invalid paths are never passed to this function).