You mean on the CPU, right? This CPU doesn't support AVX-512: $ grep ^flags /proc/cpuinfo | egrep "avx|sse|popcnt" | sed 's/ /\n/g' | egrep "avx|sse|popcnt"

You mean on the CPU, right? This CPU doesn't support AVX-512: $ grep ^flags /proc/cpuinfo | egrep "avx|sse|popcnt" | sed 's/ /\n/g' | egrep "avx|sse|popcnt" | sort | uniq avx avx2 misalignsse popcnt sse sse2 sse4_1 sse4_2 sse4a ssse3 What compile/build options should I use?