install -d -m 755 $(PUBLISHDIR)/developers-reference
rm -f $(PUBLISHDIR)/developers-reference/*.html
rm -f en && ln -sf . en
- $(foreach format,$(FORMATS),$(foreach lang,en $(LANGS),for file in $(lang)/*.$(format); do if [ -e "$$file" ]; then cp $$file $(PUBLISHDIR)/developers-reference/$$(basename $$file .$(format)).$(lang).$(format); fi; done;))
+ $(foreach format,$(FORMATS),$(foreach lang,en $(LANGS),for file in $(lang)/*.$(format); do if [ -e "$$file" ]; then cp --preserve=timestamps $$file $(PUBLISHDIR)/developers-reference/$$(basename $$file .$(format)).$(lang).$(format); fi; done;))
ln -sf index.en.html $(PUBLISHDIR)/developers-reference/index.html
ln -sf developers-reference.en.pdf $(PUBLISHDIR)/developers-reference/developers-reference.pdf
ln -sf developers-reference.en.txt $(PUBLISHDIR)/developers-reference/developers-reference.txt