[CMake] Switching between i386, i586 and i686

[Chuck Atkins]

Hi Amul,

The -march flag doesn't automatically get set by CMake since it tends to be
highly system specific; you'll need to explicitly add it to your
CMAKE_{C,CXX,Fortran}_FLAGS variables if you want it used.  The
CMAKE_SYSTEM_PROCESSOR variable is usually used only for packaging to
determine output file names and in cross compiling.

- Chuck


On Tue, Aug 26, 2014 at 2:23 PM, Amul Shah <amul.shah at fisglobal.com> wrote:

> My host machine is RedHat 6 i686. I was wondering how I could direct CMake
> to set -march to either i386 or i586 without manually setting -march=. I
> tried changing CMAKE_SYSTEM_PROCESSOR, but that did not work.
>
> thanks,
> Amul
>
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