[ 97%] Linking CXX executable openttd
Undefined symbols for architecture x86_64:
  "_CGLChoosePixelFormat", referenced from:
      +[OTTD_CGLLayer defaultPixelFormat] in cocoa_ogl.mm.o
  "_CGLCreateContext", referenced from:
      -[OTTD_CGLLayer copyCGLContextForPixelFormat:] in cocoa_ogl.mm.o
      VideoDriver_CocoaOpenGL::AllocateContext(bool) in cocoa_ogl.mm.o
  "_CGLDestroyPixelFormat", referenced from:
      VideoDriver_CocoaOpenGL::AllocateContext(bool) in cocoa_ogl.mm.o
  "_CGLReleaseContext", referenced from:
      VideoDriver_CocoaOpenGL::Stop() in cocoa_ogl.mm.o
  "_CGLSetCurrentContext", referenced from:
      -[OTTD_CGLLayer copyCGLContextForPixelFormat:] in cocoa_ogl.mm.o
      -[OTTD_CGLLayer drawInCGLContext:pixelFormat:forLayerTime:displayTime:] in cocoa_ogl.mm.o
      VideoDriver_CocoaOpenGL::AllocateContext(bool) in cocoa_ogl.mm.o
      VideoDriver_CocoaOpenGL::Stop() in cocoa_ogl.mm.o
      VideoDriver_CocoaOpenGL::ClearSystemSprites() in cocoa_ogl.mm.o
      VideoDriver_CocoaOpenGL::AllocateBackingStore(bool) in cocoa_ogl.mm.o
      VideoDriver_CocoaOpenGL::GetVideoPointer() in cocoa_ogl.mm.o
      ...
ld: symbol(s) not found for architecture x86_64
c++: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [openttd] Error 1
make[1]: *** [CMakeFiles/openttd.dir/all] Error 2
make: *** [all] Error 2