[Bug target/56068] -march=native creates Illegal instruction on KVM guests

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56068

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |INVALID

--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> 2013-01-23 16:42:19 UTC ---
mockbuild@centos6-64bit-builder ~/build/BUILD/tmp (mock-chroot)
$ cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 13

I think that's the old qemu bug of providing a non-sensical CPUID
family/model/vendor combination by default on x86_64.  AMD family 6
is 32bits only.  Intel family 6 has 64bit support.

You'll hit funny issues with GMP as well.  Thus, fix your KVM/QEMU
config.