Re: [dpdk-dev] Build failure in v2.0.0-rc3 with !CC_AVX2_SUPPORT

[Seth Forshee <seth.forshee@canonical.com>]

On Tue, Mar 31, 2015 at 02:59:36PM +0000, Ananyev, Konstantin wrote:
> 
> 
> > -----Original Message-----
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Seth Forshee
> > Sent: Tuesday, March 31, 2015 3:41 PM
> > To: dev@dpdk.org
> > Subject: [dpdk-dev] Build failure in v2.0.0-rc3 with !CC_AVX2_SUPPORT
> > 
> > I'm getting errors when building DPDK in an Ubuntu 15.04 VM with
> > T=x86_64-native-linuxapp-gcc. I've got a small VM set up without avx2 in
> > the cpu flags:
> > 
> >   $ cat /proc/cpuinfo
> >   processor       : 0
> >   vendor_id       : GenuineIntel
> >   cpu family      : 6
> >   model           : 6
> >   model name      : QEMU Virtual CPU version 2.0.0
> >   stepping        : 3
> >   microcode       : 0x1
> >   cpu MHz         : 2993.068
> >   cache size      : 4096 KB
> >   physical id     : 0
> >   siblings        : 1
> >   core id         : 0
> >   cpu cores       : 1
> >   apicid          : 0
> >   initial apicid  : 0
> >   fpu             : yes
> >   fpu_exception   : yes
> >   cpuid level     : 4
> >   wp              : yes
> >   flags           : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36 clflush mmx fxsr sse sse2 syscall nx lm rep_good nopl
> > pni vmx cx16 x2apic popcnt hypervisor lahf_lm abm vnmi ept
> 
> 
> It seems that your VM cpu doesn't even have SSE3.
> As I remember, DPDK doesn't support architectures prior to SSE3, i.e you need a VM with at least core2 CPU.

This VM was set up with a script that just uses the qemu default CPU,
which is quite basic. Bumping it up to a core2 with SSE3 but not avx
does get the build working. So if that CPU lacks features required by
DPDK then I guess there's no problem, I just didn't know how to
interpret those build errors.

Thanks,
Seth