Error packaging for Mac

When I try to package a C++ project for Mac the process fails with the following error:

MainFrameActions: Packaging (Mac): mono: Undefined symbols for architecture x86_64:
MainFrameActions: Packaging (Mac): mono:   "_voucher_mach_msg_set", referenced from:
MainFrameActions: Packaging (Mac): mono:       _mach_exception_raise in libCrashReporter-MacOSX-Static.a(libCrashReporter-MacOSX-Static.a-x86_64-master.o)
MainFrameActions: Packaging (Mac): mono:       _mach_exception_raise_state in libCrashReporter-MacOSX-Static.a(libCrashReporter-MacOSX-Static.a-x86_64-master.o)
MainFrameActions: Packaging (Mac): mono:       _mach_exception_raise_state_identity in libCrashReporter-MacOSX-Static.a(libCrashReporter-MacOSX-Static.a-x86_64-master.o)
MainFrameActions: Packaging (Mac): mono: ld: symbol(s) not found for architecture x86_64
MainFrameActions: Packaging (Mac): mono: clang: error: linker command failed with exit code 1 (use -v to see invocation)

At the same time, package for Windows runs with no problems. It seems I need to reference something in build.cs, but I can’t find out what exactly. I have no idea what this “_voucher_mach_msg_set” thing is.

The full log is here.

Would be very grateful for any hints.

I’m having the same issue on Mac. Did you solve it, Elringus?

Ah, it looks like upgrading to Xcode 6.4 solved it for me.