-O3 -pipe -march=znver2 -mtune=znver3 -frecord-gcc-switches -fdiagnostics-color=never -fstrict-flex-arrays=3 -fstack-clash-protection -fstack-protector-strong -fcf-protection=full -fno-delete-null-pointer-checks -fno-strict-overflow -fno-strict-aliasing -ftrivial-auto-var-init=zero -msse4.2
