unrecognized command line option “-std=c++11” with g++

http://stackoverflow.com/questions/14674597/cc1plus-error-unrecognized-command-line-option-std-c11-with-g
In versions pre-G++ 4.7, you'll have to use -std=c++0x, for more recent versions you can use -std=c++11.

http://stackoverflow.com/questions/11616539/g-nullptr-was-not-declared-in-this-scope