-TEXI2HTML_FLAGS += --css-ref=lilypond.css $(DOCUMENTATION_INCLUDES)
-TEXI2HTML_INIT = --init-file=$(top-src-dir)/lilypond-texi2html.init
-TEXI2HTML = $(TEXI2HTML_PROGRAM) $(TEXI2HTML_FLAGS) $(TEXI2HTML_LANG)
+
+DOC_TEXI2HTML_INIT = --init-file=$(top-src-dir)/Documentation/lilypond-texi2html.init
+WEB_TEXI2HTML_INIT =--init-file=$(top-src-dir)/Documentation/web-texi2html.init
+TEXI2HTML_INIT = $(DOC_TEXI2HTML_INIT)
+
+DOC_TEXI2HTML_SPLIT = --prefix=index --split=section
+# --split=node --node-files makes that translated pages have
+# translated file names, that breaks.
+## WEB_TEXI2HTML_SPLIT = --prefix=index --split=node --node-files
+WEB_TEXI2HTML_SPLIT = $(DOC_TEXI2HTML_SPLIT)
+TEXI2HTML_SPLIT = $(DOC_TEXI2HTML_SPLIT)
+
+TEXI2HTML_INCLUDES += --I=. --I=$(src-dir) --I=$(outdir) $(DOCUMENTATION_INCLUDES) --I=$(XREF_MAPS_DIR)
+TEXI2HTML_FLAGS += $(TEXI2HTML_INCLUDES) $(TEXI2HTML_INIT) $(TEXI2HTML_LANG)
+TEXI2HTML = PERL_UNICODE=SD $(TEXI2HTML_PROGRAM)
+###########
+
+
+TEXI2PDF_FLAGS += $(DOCUMENTATION_INCLUDES)
+
+ifdef QUIET_BUILD
+TEXI2PDF_FLAGS += -q
+endif