I'm building a demo project which uses a 3d engine names "OpenSceneGraph" writing in C++, this engine provides tens of .a static library files after building. while I use those .a files in my xcode project, errors appeared
Undefined symbols for architecture arm64:
referenced from: in xxx.a
ld: symbol(s) not found for architecture arm64
I checked those .a files by using "lipo -info" command, they all support arm64 architecture. I got confused now.