--- src/VBox/RDP/client-1.8.4/config.guess.orig	2020-07-10 02:57:20.000000000 +1000
+++ src/VBox/RDP/client-1.8.4/config.guess	2020-08-22 01:42:39.921928000 +1000
@@ -146,6 +146,20 @@
 # Note: order is significant - the case branches are not exclusive.
 
 case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
+    *:BSDSUnIX:*:*)
+	# Determine whether the default compiler uses glibc.
+	eval $set_cc_for_build
+	sed 's/^	//' << EOF >$dummy.c
+	#include <features.h>
+	#if __GLIBC__ >= 2
+	LIBC=gnu
+	#else
+	LIBC=
+	#endif
+EOF
+	eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep ^LIBC=`
+	echo ${UNAME_MACHINE}-unknown-bsdsunix`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`${LIBC:+-$LIBC}
+	exit 0 ;;
     *:NetBSD:*:*)
 	# NetBSD (nbsd) targets should (where applicable) match one or
 	# more of the tupples: *-*-netbsdelf*, *-*-netbsdaout*,