CLEANFILES += \
man/index.html
-man/index.html: $(XML_FILES)
- $(AM_V_GEN)$(PYTHON) $(top_srcdir)/make-man-index.py $(XML_FILES) > $@
+man/index.html: $(XML_FILES) $(top_srcdir)/make-man-index.py
+ $(AM_V_GEN)$(PYTHON) $(top_srcdir)/make-man-index.py $(XML_FILES) > $@ || rm $@
endif
endif