I seem to have managed to conjure about 200 linker warnings that all pretty much revolve around the same concept:
After a bit of searching, I was unable to find a solution, or even a point in the right direction, for that matter. To reiterate, yes, these are only -warnings-... but that doesn't any less mean they need to go.
Apple Mach-O Linker
Direct access in __GLOBAL__l_a to global weak symbol (Insert FBXSDK-2012 code here) means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.
I receive no warnings whatsoever in Visual Studio on Windows.
PS: One such insertion is: