Thank you for digging into this. Through your advice, I was able to track this down to an errant CFLAGS += “-march=native” in my environment configuration. 

Jeremiah Peschka

On Oct 24, 2018, 05:11 -0700, Kent.Mcleod@data61.csiro.au, wrote:

the binary that you sent had instructions from the AVX SIMD extensions which the nehalem microarch doesn't have.