There are some issues with this compiler (reference ) which make it unusable under certain circumstances. The genuine Xcode compiler seems to be a be a better choice.

To install a true g++ compiler, version 4.9 for example, using MacPorts :

• sudo port install gcc49,
• sudo install gcc_select (don't know if this is really needed),
• port select --list gcc (to display available versions),
• sudo port select gcc mp-gcc49 (mp-gcc49 picked from above listing).