diff --git a/test/listused.sh b/test/listused.sh
new file mode 100755
index 0000000..1c3fe0a
--- /dev/null
+++ b/test/listused.sh
@@ -0,0 +1,183 @@
+#!/bin/sh
+##############################################################################
+# Copyright (c) 2003-2006,2010 Free Software Foundation, Inc.                #
+#                                                                            #
+# Permission is hereby granted, free of charge, to any person obtaining a    #
+# copy of this software and associated documentation files (the "Software"), #
+# to deal in the Software without restriction, including without limitation  #
+# the rights to use, copy, modify, merge, publish, distribute, distribute    #
+# with modifications, sublicense, and/or sell copies of the Software, and to #
+# permit persons to whom the Software is furnished to do so, subject to the  #
+# following conditions:                                                      #
+#                                                                            #
+# The above copyright notice and this permission notice shall be included in #
+# all copies or substantial portions of the Software.                        #
+#                                                                            #
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR #
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   #
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    #
+# THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      #
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING    #
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER        #
+# DEALINGS IN THE SOFTWARE.                                                  #
+#                                                                            #
+# Except as contained in this notice, the name(s) of the above copyright     #
+# holders shall not be used in advertising or otherwise to promote the sale, #
+# use or other dealings in this Software without prior written               #
+# authorization.                                                             #
+##############################################################################
+# $Id: listused.sh,v 1.8 2010/09/18 15:15:15 tom Exp $
+# A very simple script to list all entrypoints that are used by either a test
+# program, or within the libraries.  This relies on the output format of 'nm',
+# and assumes that the libraries are configured with TRACE defined, and using
+# these options:
+#	--disable-macros
+#	--enable-sp-funcs
+#	--enable-widec
+# Static libraries are used, to provide some filtering based on internal usage
+# of the different symbols.
+
+# keep the sorting independent of locale:
+if test "${LANGUAGE+set}"    = set; then LANGUAGE=C;    export LANGUAGE;    fi
+if test "${LANG+set}"        = set; then LANG=C;        export LANG;        fi
+if test "${LC_ALL+set}"      = set; then LC_ALL=C;      export LC_ALL;      fi
+if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
+if test "${LC_CTYPE+set}"    = set; then LC_CTYPE=C;    export LC_CTYPE;    fi
+if test "${LC_COLLATE+set}"  = set; then LC_COLLATE=C;  export LC_COLLATE;  fi
+
+NM_OPTS=
+
+if test ! -d ../objects ; then
+	echo "? need objects to run this script"
+	exit 1
+elif test ! -d ../lib ; then
+	echo "? need libraries to run this script"
+	exit 1
+fi
+
+PROGS=
+for name in `(echo "test:";sort modules; echo "progs:";sort ../progs/modules) |sed -e 's/[ 	].*//' -e '/^[#@]/d'`
+do
+	case $name in
+	*:)
+		PROGS="$PROGS $name"
+		;;
+	*)
+		NAME=../objects/${name}.o
+		if test -f $NAME
+		then
+			PROGS="$PROGS $NAME"
+		fi
+		;;
+	esac
+done
+
+# For each library -
+for lib in ../lib/*.a
+do
+	LIB=`basename $lib .a`
+	case $LIB in
+	*_*|*+*)
+		continue
+		;;
+	esac
+
+	tmp=`echo $LIB|sed -e 's/w$//'`
+	echo
+	echo "${tmp}:"
+	echo $tmp |sed -e 's/./-/g'
+	# Construct a list of public externals provided by the library.
+	WANT=`nm $NM_OPTS $lib |\
+		sed	-e 's/^[^ ]*//' \
+			-e 's/^ *//' \
+			-e '/^[ a-z] /d' \
+			-e '/:$/d' \
+			-e '/^$/d' \
+			-e '/^U /d' \
+			-e 's/^[A-Z] //' \
+			-e '/^_/d' |\
+		sort -u`
+	# List programs which use that external.
+	for name in $WANT
+	do
+		HAVE=
+		tags=
+		last=
+		for prog in $PROGS
+		do
+			case $prog in
+			*:)
+				tags=$prog
+				;;
+			*)
+				TEST=`nm $NM_OPTS $prog |\
+					sed	-e 's/^[^ ]*//' \
+						-e 's/^ *//' \
+						-e '/^[ a-z] /d' \
+						-e '/:$/d' \
+						-e '/^$/d' \
+						-e 's/^[A-Z] //' \
+						-e '/^_/d' \
+						-e 's/^'${name}'$/_/' \
+						-e '/^[^_]/d'`
+				if test -n "$TEST"
+				then
+					have=`basename $prog .o`
+					if test -n "$HAVE"
+					then
+						if test "$last" = "$tags"
+						then
+							HAVE="$HAVE $have"
+						else
+							HAVE="$HAVE $tags $have"
+						fi
+					else
+						HAVE="$tags $have"
+					fi
+					last="$tags"
+				fi
+				;;
+			esac
+		done
+		# if we did not find a program using it directly, see if it
+		# is used within a library.
+		if test -z "$HAVE"
+		then
+			for tmp in ../lib/*.a
+			do 
+				case $tmp in
+				*_*|*+*)
+					continue
+					;;
+				esac
+				TEST=`nm $NM_OPTS $tmp |\
+					sed	-e 's/^[^ ]*//' \
+						-e 's/^ *//' \
+						-e '/^[ a-z] /d' \
+						-e '/:$/d' \
+						-e '/^$/d' \
+						-e '/^[A-TV-Z] /d' \
+						-e 's/^[A-Z] //' \
+						-e '/^_/d' \
+						-e 's/^'${name}'$/_/' \
+						-e '/^[^_]/d'`
+				if test -n "$TEST"
+				then
+					tmp=`basename $tmp .a |sed -e 's/w$//'`
+					HAVE=`echo $tmp | sed -e 's/lib/lib: /'`
+					break
+				fi
+			done
+		fi
+		test -z "$HAVE" && HAVE="-"
+		lenn=`expr 39 - length $name`
+		lenn=`expr $lenn / 8`
+		tabs=
+		while test $lenn != 0
+		do
+			tabs="${tabs}	"
+			lenn=`expr $lenn - 1`
+		done
+		echo "${name}${tabs}${HAVE}"
+	done
+done