Which dynamic libraries on OS X can be taken for granted?

If I want to make an OS X program as self-contained as possible to ease installation, what开发者_如何学C dynamic libraries can I expect everyone or most people to have? If I know that, I won't have to compile static libraries for everything.

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All functions listed in Single UNIX Specification V3 are available.

Obviously, all Cocoa frameworks are available as well. The exact contents depend on OS version.