gcc optimisation flags for Intel Atom

[Ian Lance Taylor]

Michael Zintakis <michael.zintakis@googlemail.com> writes:

> I am reading some very different (and sometimes conflicting) opinions
> what these optimisation flags should be. So, what are the best flags
> to use to compile source code for running on Atom?
>
> Personally, I think using "-O2 -march=atom -msssse3 -mfpmath=sse
> -fomit-frame-pointer -pipe" is decent enough. Any other opinions? I am
> using gcc 4.4.5.

As far as I know GCC 4.4 does not support -march=atom.  That was added
in GCC 4.5.

Ian