Index: configure.ac
===================================================================
RCS file: /cvsroot/quilt/quilt/configure.ac,v
retrieving revision 1.35
diff -u -r1.35 configure.ac
--- configure.ac	29 Apr 2005 07:35:01 -0000	1.35
+++ configure.ac	24 May 2005 19:43:19 -0000
@@ -200,6 +200,31 @@
 using the '--with-diffstat' option.
 ])
     DIFFSTAT="diffstat"
+else
+    # We need diffstat version 1.32 or better, else quilt refresh --diffstat
+    # will show progress data we don't want to see.  This is only a warning
+    # and we continue even if version is older, as this is only a minor annoyance.
+    AC_MSG_CHECKING([for diffstat version])
+    diffstat_major_version=`$DIFFSTAT -V 2>/dev/null | \
+	sed 's/^[[^0-9]]*\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
+    diffstat_minor_version=`$DIFFSTAT -V 2>/dev/null | \
+	sed 's/^[[^0-9]]*\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
+    if test -z "$diffstat_major_version" -o -z "$diffstat_minor_version"; then
+	AC_MSG_RESULT(unknown)
+	AC_MSG_WARN([
+diffstat utility version couldn't be checked; chances are good that the
+--diffstat option of the refresh and diff commands will not work properly.
+])
+    else
+	AC_MSG_RESULT($diffstat_major_version.$diffstat_minor_version)
+	if test "$diffstat_major_version" -lt 1 \
+	   -o \( "$diffstat_major_version" -eq 1 -a "$diffstat_minor_version" -lt 32 \); then
+	    AC_MSG_WARN([
+diffstat utility is too old; the --diffstat option of the refresh command
+will not work correctly until a newer version (>= 1.32) is installed.
+])
+	fi
+    fi
 fi
 
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