--- cl-original/tools/ccopts.sh	2022-03-04 19:32:14.000000000 +0100
+++ cl-patched/tools/ccopts.sh	2023-04-05 11:19:59.034814258 +0200
@@ -897,7 +897,7 @@
 		if [ $GENERICBUILD -gt 0 ] ; then
 			echo "  (Enabling lowest-common-denominator build options for cross-platform library)." >&2 ;
 		else
-			CCARGS="$CCARGS -march=native -mtune=generic" ;
+			CCARGS="$CCARGS -m64 -mtune=generic" ;
 		fi
 		if [ "$ARCH" = "x86_64" ] ; then
 			CCARGS="$CCARGS -fPIC" ;