diff -ruN orig/v19-devel/configure v19-devel/configure
--- orig/v19-devel/configure	2006-11-25 01:19:53.000000000 -0600
+++ v19-devel/configure	2006-11-25 01:19:24.000000000 -0600
@@ -20528,6 +20528,17 @@
             CFLAGS="$CFLAGS -I\$(top_srcdir)/pa_asio -I$ASIDIR/host/mac -I$ASIODIR/common";
             CXXFLAGS="$CFLAGS";
         fi
+
+        if [ $have_jack = "yes" ] && [ $with_jack != "no" ] ; then
+           DLL_LIBS="$DLL_LIBS $JACK_LIBS"
+           CFLAGS="$CFLAGS $JACK_CFLAGS"
+           OTHER_OBJS="$OTHER_OBJS src/hostapi/jack/pa_jack.o"
+           cat >>confdefs.h <<\_ACEOF
+#define PA_USE_JACK 1
+_ACEOF
+
+        fi
+
 	;;
 
   mingw* )
diff -ruN orig/v19-devel/configure.in v19-devel/configure.in
--- orig/v19-devel/configure.in	2006-11-25 01:19:53.000000000 -0600
+++ v19-devel/configure.in	2006-11-25 01:19:14.000000000 -0600
@@ -152,6 +152,14 @@
             CFLAGS="$CFLAGS -I\$(top_srcdir)/pa_asio -I$ASIDIR/host/mac -I$ASIODIR/common";
             CXXFLAGS="$CFLAGS";
         fi
+
+        if [[ $have_jack = "yes" ] && [ $with_jack != "no" ]] ; then
+           DLL_LIBS="$DLL_LIBS $JACK_LIBS"
+           CFLAGS="$CFLAGS $JACK_CFLAGS"
+           OTHER_OBJS="$OTHER_OBJS src/hostapi/jack/pa_jack.o"
+           AC_DEFINE(PA_USE_JACK)
+        fi
+     
 	;;
 
   mingw* )