-4 $(filter-out %-true.png, $(filter-out %-mono.png, $^)) \
-1 $(filter %-mono.png, $^) > $@
+# Icon for the website. (This isn't linked into "make all".)
+website.ico: putty-16.png
+ ./icon.pl -4 $^ >$@
+
xpmputty.c: putty-16.png putty-32.png putty-48.png
./cicon.pl main_icon $^ > $@