I got std::cerr and std::hash error during my first build of bitshares-core, these two errors all occurred in bitshares-fc library.
The solution is using boost1.6 and pass the BOOST_ROOT macro when executing cmake, like this:
brew install boost@1.60
cmake -DBOOST_ROOT=/usr/local/opt/boost@1.60
It may resolve most compile error you will encounter.
btw. the openssl not founding issue I mentioned yesterday also exists in bitshares-core codebase, could be resolved by exporting OPENSSL_ROOT_DIR macro:
export OPENSSL_ROOT_DIR=/usr/local/opt/openssl/
Note: both boost and openssl are installed using brew on osx platform