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diff --git a/docs/manual/manual.mk b/docs/manual/manual.mk
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index 000000000..1eaf73a5b
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+################################################################################
+# GENDOC -- generates the make targets needed to build a specific type of
+#           asciidoc documentation.
+#
+#  argument 1 is the name of the document and must be a subdirectory of docs/;
+#             the top-level asciidoc file must have the same name
+#  argument 2 is the type of document to generate (-f argument of a2x)
+#  argument 3 is the document type as used in the make target
+#  argument 4 is the output file extension for the document type
+#  argument 5 is the human text for the document type
+#  argument 6 (optional) are extra arguments for a2x
+#
+# The variable <DOCUMENT_NAME>_SOURCES defines the dependencies.
+################################################################################
+define GENDOC_INNER
+$(1): $(1)-$(3)
+.PHONY: $(1)-$(3)
+$(1)-$(3): $$(O)/docs/$(1)/$(1).$(4)
+
+$$(O)/docs/$(1)/$(1).$(4): docs/$(1)/$(1).txt $$($(call UPPERCASE,$(1))_SOURCES)
+	@echo "Generating $(5) $(1)..."
+	$(Q)mkdir -p $$(@D)
+	$(Q)a2x $(6) -f $(2) -d book -L -r $(TOPDIR)/docs/images \
+	  -D $$(@D) $$<
+endef
+
+################################################################################
+# GENDOC -- generates the make targets needed to build asciidoc documentation.
+#
+#  argument 1 is the name of the document and must be a subdirectory of docs/;
+#             the top-level asciidoc file must have the same name
+#
+# The variable <DOCUMENT_NAME>_SOURCES defines the dependencies.
+################################################################################
+define GENDOC
+$(call GENDOC_INNER,$(1),xhtml,html,html,HTML)
+$(call GENDOC_INNER,$(1),chunked,split-html,chunked,Split HTML)
+$(call GENDOC_INNER,$(1),pdf,pdf,pdf,PDF,--dblatex-opts "-P latex.output.revhistory=0")
+$(call GENDOC_INNER,$(1),text,txt,text,Text)
+$(call GENDOC_INNER,$(1),epub,epub,epub,EPUB)
+clean: clean-$(1)
+clean-$(1):
+	$(Q)$(RM) -rf $(O)/docs/$(1)
+.PHONY: $(1) clean-$(1)
+endef
+
+MANUAL_SOURCES = $(wildcard docs/manual/*.txt) $(wildcard docs/images/*)
+$(eval $(call GENDOC,manual))