--- cl-original/tools/ccopts.sh	2026-10-10 09:51:11.333021136 +0200
+++ cl-patched/tools/ccopts.sh	2026-10-10 10:22:07.556814007 +0200
@@ -1274,7 +1274,7 @@
 		if [ $GENERICBUILD -gt 0 ] ; then
 			echo "  (Enabling lowest-common-denominator build options for cross-platform library)." >&2 ;
 		else
-			CCARGS="$CCARGS -march=x86-64-v3" ;
+			CCARGS="$CCARGS -m64" ;
 		fi
 	elif [ "$COMPILER_VER" -ge 45 ] ; then
 		if [ $GENERICBUILD -gt 0 ] ; then
