ok, this one really works

auxdir/x_ac_gtk.m4

@@ -42,14 +42,14 @@ AC_DEFUN([X_AC_GTK],
             ac_have_gtk="no"
 	else
 	   gtk_config_major_version=`$HAVEPKGCONFIG --modversion gtk+-2.0 | \
-             sed 's/\([[0-9]*]*\).\([[0-9]*]*\).\([[0-9]*]*\)/\1/'`
-    	   gtk_config_minor_version=`$PKG_CONFIG --modversion gtk+-2.0 | \
-             sed 's/\([[0-9]*]*\).\([[0-9]*]*\).\([[0-9]*]*\)/\2/'`
-    	   gtk_config_micro_version=`$PKG_CONFIG --modversion gtk+-2.0 | \
-             sed 's/\([[0-9]*]*\).\([[0-9]*]*\).\([[0-9]*]*\)/\3/'`
+             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+    	   gtk_config_minor_version=`$HAVEPKGCONFIG --modversion gtk+-2.0 | \
+             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+    	   gtk_config_micro_version=`$HAVEPKGCONFIG --modversion gtk+-2.0 | \
+             sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
 
-	   if test $gtk_config_major_version -lt 2 || $gtk_config_minor_version -lt 6 ; then
-	   	AC_MSG_WARN([*** gtk+-$gtk_config_major_version.$gtk_config_minor_version.gtk_config_micro_version we need >= $gtk+-2.6.0 installed for sview.])
+	   if test $gtk_config_major_version -lt 2 || test $gtk_config_minor_version -lt 6 ; then
+	   	AC_MSG_WARN([*** gtk+-$gtk_config_major_version.$gtk_config_minor_version.$gtk_config_micro_version available, we need >= gtk+-2.6.0 installed for sview.])
             	ac_have_gtk="no"
 	   fi
         fi