+TEXTARGETS := toc.pdf
+
+CMP := cmp -s
+DIFF := diff
+PATCH := patch
+
+.PHONY: all update rebase clean distclean
+
+$(TEXTARGETS):
+
+all:
+ @$(MAKE) -s toc_1.pdf
+ @$(ECHO) '--------------------'
+ @$(MAKE) -s toc_2.pdf
+
+toc_1.pdf: rebase
+ @$(ECHO) '---------- $@: $^ ----------'
+ @$(MAKE) -s toc.pdf
+ @$(CP) -v toc.pdf $@
+
+toc_2.pdf: update
+ @$(ECHO) '---------- $@: $^ ----------'
+ @$(MAKE) -s toc.pdf
+ @$(CP) -v toc.pdf $@
+
+update: toc.tex.6th.patch
+ @$(PATCH) <$<
+
+toc.tex.6th.patch:
+ @$(MAKE) -s rebase
+ @$(DIFF) -u toc.tex toc.tex.6th >$@ || exit 0
+
+rebase:
+ $(CMP) toc.tex.5th toc.tex || $(CP) -v toc.tex.5th toc.tex
+
+include latex.mk
+
+clean: tex-clean
+
+distclean: rebase tex-distclean
+ $(RM) *.patch
+ $(RM) toc_*.pdf