Hi, I'm wondering where gcc_select is installed? I have it installed already. /opt/local/var/macports$ port installed |grep gcc_select gcc_select @0.1_5 (active) According to this page, there should be a command called gcc_select. But I just don't find one. Is my understanding wrong? https://trac.macports.org/wiki/UsingTheRightCompiler -- Regards, Peng