This article is an interesting discussion of how Mac OS X differs from other Unices and what some of the considerations are when porting Unix software to Mac OS X.
Some snippets of interest:
dlopen, dlsym, dlclose, etc. not supported; there are some ugly Mac-specific alternatives. I thought I had heard that Mac had implementations of those functions written in terms of the Mac-specific ones. I don’t know if that was wrong or maybe this document is old.- Mac OS X has a different mechanism for shared libraries and a different linker
- No
ldd; useotool -Linstead.