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?



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