+TEXI2HTML_SPLIT = --prefix=index --split=section
+
+TEXI2HTML_INCLUDES += --I=. --I=$(src-dir) --I=$(outdir) $(DOCUMENTATION_INCLUDES) --I=$(XREF_MAPS_DIR)
+# To overwrite texi2html default i18n messages with the LilyPond init file,
+# delete TEXI2HTML_INIT that exists before TEXI2HTML_LANG.
+TEXI2HTML_FLAGS := $(filter-out $(TEXI2HTML_INIT),$(TEXI2HTML_FLAGS))
+# Instead, add languages minimum initialization before TEXI2HTML_LANG.
+TEXI2HTML_FLAGS := $(subst $(TEXI2HTML_LANG),$(TEXI2HTML_LANG_INIT) $(TEXI2HTML_LANG),$(TEXI2HTML_FLAGS))
+TEXI2HTML_FLAGS += $(TEXI2HTML_INCLUDES) $(TEXI2HTML_LANG_INIT) $(TEXI2HTML_LANG) $(TEXI2HTML_INIT)
+TEXI2HTML = TOP_SRC_DIR=$(top-src-dir) PERL_UNICODE=SD $(TEXI2HTML_PROGRAM)
+###########
+
+TEXI2PDF_FLAGS += $(DOCUMENTATION_INCLUDES)
+TEXI2PDF_FLAGS += -I $(LYS_OUTPUT_DIR)