--- configure.orig	2016-03-03 07:52:15 UTC
+++ configure
@@ -47228,6 +47228,7 @@ fi
 $as_echo "$enable_dane" >&6; }
 
 if test "$enable_dane" != "no"; then
+    oldlibs="$LIBS"
     LIBS="$oldlibs -lunbound"
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for unbound library" >&5
 $as_echo_n "checking for unbound library... " >&6; }
@@ -47444,6 +47445,7 @@ else
 fi
 
 if test "$with_tpm" != "no"; then
+    oldlibs="$LIBS"
     LIBS="$oldlibs -ltspi"
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for tss library" >&5
 $as_echo_n "checking for tss library... " >&6; }