architecture level argument for x86_64 not liked

Reinoud Koornstra
Fri Nov 7 21:32:00 GMT 2014

Hi Everyone,

In target option I selected x86
Bitness: 64 bit.
Is there a value I can fill out for the architecture level?
The values suggested here:

for march aren't known (nehalem etc), the options for mtune (generic
or intel) or stumble upon problems.
for arm I can just set a arm cpu type without problems, not for x86_64.
Any advice?


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