diff -u a/aclocal.m4 b/aclocal.m4
--- a/aclocal.m4	2020-11-20 16:30:11.541945962 +0100
+++ b/aclocal.m4	2020-11-20 16:30:24.353871884 +0100
@@ -451,7 +451,7 @@
 
 AC_CACHE_CHECK(for options to update archives, cf_cv_ar_flags,[
 	cf_cv_ar_flags=unknown
-	for cf_ar_flags in -curvU -curv curv -crv crv -cqv cqv -rv rv
+	for cf_ar_flags in -curv curv -crv crv -cqv cqv -rv rv
 	do
 
 		# check if $ARFLAGS already contains this choice
diff -u a/configure b/configure
--- a/configure	2020-11-20 16:30:11.541945962 +0100
+++ b/configure	2020-11-20 16:30:43.069763555 +0100
@@ -4503,7 +4503,7 @@
 else
 
 	cf_cv_ar_flags=unknown
-	for cf_ar_flags in -curvU -curv curv -crv crv -cqv cqv -rv rv
+	for cf_ar_flags in -curv curv -crv crv -cqv cqv -rv rv
 	do
 
 		# check if $ARFLAGS already contains this choice