xcode 8 build fail

[liufsd]

Undefined symbols for architecture x86_64:
"___pthread_set_self", referenced from:
_injectEntry in mach_inject_bundle_stub.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

** BUILD FAILED **

The following build commands failed:
Ld build/mach_inject_bundle_stub.build/Default/mach_inject_bundle_stub.build/Objects-normal/x86_64/mach_inject_bundle_stub normal x86_64
(1 failure)

[surrenderios]

Undefined symbols for architecture x86_64:
"___pthread_set_self", referenced from:
_injectEntry in mach_inject_bundle_stub.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

** BUILD FAILED **

The following build commands failed:
Ld build/mach_inject_bundle_stub.build/Default/mach_inject_bundle_stub.build/Objects-normal/x86_64/mach_inject_bundle_stub normal x86_64
(1 failure)

i try to Fix problem in this way, It works well
/*
Mac OS X 10.12 change __pthread_set_self in libSystem.B.dylb to _pthread_set_self
*/

#ifdef __MAC_10_12
extern void _pthread_set_self(char*);
_pthread_set_self(dummy_pthread_struct);
#else
extern void __pthread_set_self(char*);
__pthread_set_self(dummy_pthread_struct);
#endif