elif [ "$sbcl_arch" = "x86-64" ]; then
printf ' :gencgc :stack-grows-downward-not-upward :c-stack-is-control-stack :linkage-table' >> $ltf
printf ' :compare-and-swap-vops :unwind-to-frame-and-call-vop' >> $ltf
elif [ "$sbcl_arch" = "x86-64" ]; then
printf ' :gencgc :stack-grows-downward-not-upward :c-stack-is-control-stack :linkage-table' >> $ltf
printf ' :compare-and-swap-vops :unwind-to-frame-and-call-vop' >> $ltf