I'm currently trying to write an external using the MAXcpp header. I've managed to get it to compile with Xcode 4.6 and OSX 10.8, but recently had to upgrade to a newer version of OSX and Xcode. Unfortunately, this broke my Xcode project, and it no longer compiles due to a linker error (undefined symbol for i386 architecture: _common_symbols_init). I feel like the issue has to do with linking commonsyms.h to maxcpp.h when compiling, but I can't figure out how to do this. Any input would be greatly appreciated.