For whom that updated the XCode to version 5.1 and are having problems building boost libraries, check this patch: https://github.com/boostorg/atomic/commit/6bb71fdd8f7cc346d90fb14beb38b7297fc1ffd9
For whom that updated the XCode to version 5.1 and are having problems building boost libraries, check this patch: https://github.com/boostorg/atomic/commit/6bb71fdd8f7cc346d90fb14beb38b7297fc1ffd9