+ --stringparam manifest.in.base.dir 1 \
+ --stringparam htmlhelp.chm "..\\"$(basename $<).chm \
+ $(XSLTPROC_OPTS) \
+ $(DIR_DOCBOOK_XSL)/htmlhelp/htmlhelp.xsl $<
+
+%-htmlhelp2/collection.HxC : %.xml
+ $(RM) -rf $(dir $@)
+ $(XSLTPROC) --stringparam base.dir $(dir $@) \
+ --stringparam use.id.as.filename 1 \
+ --stringparam manifest.in.base.dir 1 \
+ $(XSLTPROC_OPTS) \
+ $(DIR_DOCBOOK_XSL)/htmlhelp2/htmlhelp2.xsl $<
+
+# TODO: Detect hhc & Hxcomp via autoconf
+#
+# Two obstacles here:
+#
+# * The reason for the strange "if" below is that hhc returns 0 on error and 1
+# on success, the opposite of what shells and make expect.
+#
+# * There seems to be some trouble with DocBook indices, but the *.chm looks OK,
+# anyway, therefore we pacify make by "|| true". Ugly...
+#
+%.chm : %-htmlhelp/index.html
+ ( cd $(dir $<) && if hhc htmlhelp.hhp ; then false ; else true ; fi ) || true
+
+%.HxS : %-htmlhelp2/collection.HxC
+ ( cd $(dir $<) && if Hxcomp -p collection.HxC -o ../$@ ; then false ; else true ; fi )