#51642: gcc49 @4.9.3: does not honor -march=native -------------------------+------------------- Reporter: noloader@… | Owner: mww@… Type: defect | Status: new Priority: Normal | Milestone: Component: ports | Version: 2.3.4 Resolution: | Keywords: Port: gcc49 | -------------------------+------------------- Comment (by vince@…): I am sorry to butt in, but this sound to me like the old 'as' story. GCC 4 use Apple-supplied /usr/bin/as (or /opt/local/bin/as for that matter): {{{ as -v Apple Inc version cctools-877.8, GNU assembler version 1.38 }}} Which is so ancient it does not know about SSE 4 or AVX. Clang has its own modern assembly, and can (maybe?) be used as a backend for GCC -- Ticket URL: <https://trac.macports.org/ticket/51642#comment:8> MacPorts <https://www.macports.org/> Ports system for OS X