On 17.10.2016 12:49, Michael Tokarev wrote: > 17.10.2016 13:39, Michael Tokarev wrote: > >> (cc is gcc 6.2.0) >> >> I've no idea which -march is the default and what choices are available. > > $ gcc -march=? > gcc: error: unrecognized argument in option '-march=?' > gcc: note: valid arguments to '-march=' are: g5 g6 native z10 z13 z196 > z9-109 z9-ec z900 z990 zEC12 > > I guess g5 is the default?
I hope it is not the default - at least not for -m64. Could you please run the following and post the results: gcc -Q --help=target Thanks, Thomas
