I'm trying to build a dynamic version of an old C static library. The static library, as it stands, references symbols which are defined in the program the static library is bound to. When I try to build this as a dynamic library I get: ld: symbol(s) not found for architecture x86_64 messages. I suspect there is a way to work around this (weak references?) but I don't understand how to do it, and none of the online documentation and commentary I have found seems to help. Does anyone have suggestions to offer?