diff --git a/configuration/configure.ac b/configuration/configure.ac
index 7320736..1692700 100644
--- a/configuration/configure.ac
+++ b/configuration/configure.ac
@@ -92,6 +92,7 @@
 dnl Miscellaneous utilities.
 dnl
 AC_PROG_SED
+AC_PATH_PROG(TR, tr)
 AC_PATH_PROG(CUT, cut)
 AX_PROG_PERL_VERSION(5.6.0)
 AC_PATH_PROG(DATE, date)
@@ -159,7 +160,7 @@
 dnl from the XSLT environment variable, which serves a slightly different
 dnl purpose. However, we use the value derived from $XSLT above to seed the
 dnl executable name.
-# Figure out the appropriate name of the executable based on $XSLT.
+dnl Figure out the appropriate name of the executable based on $XSLT.
 AS_CASE([$XSLT],
 	[xalan-c],
 	[AC_PATH_PROG(XSLTPROC, [Xalan])],
@@ -178,9 +179,9 @@
 
 AC_PATH_JARFILE(resolver, RESOLVER, [/opt/local/share/java /sw/share/java /usr/local/share/java /usr/share/java /opt/local/lib/java /sw/lib/java /usr/local/lib/java /usr/lib/java ${HOME}/Library/Java /Library/Java /System/Library/Java])
 AC_MSG_CHECKING([for XML entity resolver])
-# We can't use -jar for the entity resolver, because it needs to be able
-# to use the CLASSPATH to find the CatalogManager.properties file. Using
-# -jar suppresses the CLASSPATH completely.
+dnl We can't use -jar for the entity resolver, because it needs to be able
+dnl to use the CLASSPATH to find the CatalogManager.properties file. Using
+dnl -jar suppresses the CLASSPATH completely.
 AS_IF([$RESOLVER_AVAILABLE],
 	[	AC_SUBST([RESOLVER], ["${JAVA} -cp ${RESOLVER_JAR}:${CLASSPATH} org.apache.xml.resolver.apps.resolver"])
 		AC_MSG_RESULT([$RESOLVER])],