Apple Clang missing typeinfo for __int128

Code Block 
[ 88%] Linking CXX executable test_cypher_suites
Undefined symbols for architecture x86_64:
  "typeinfo for __int128", referenced from:
      fc::variant::as_uint128() const in libfc.a(variant.cpp.o)
      fc::variant::to_uint128() const in libfc.a(variant.cpp.o)
      fc::variant::as_int128() const in libfc.a(variant.cpp.o)
ld: symbol(s) not found for architecture x86_64
clang-4.0: error: linker command failed with exit code 1 (use -v to see invocation)