$(WORK)/mpfr-$(LIBMPFR_VERSION): $(WORK)/mpfr-$(LIBMPFR_VERSION).tar.bz2
tar -C $(WORK) -xvjf $(WORK)/mpfr-$(LIBMPFR_VERSION).tar.bz2
$(WORK)/mpfr-$(LIBMPFR_VERSION): $(WORK)/mpfr-$(LIBMPFR_VERSION).tar.bz2
tar -C $(WORK) -xvjf $(WORK)/mpfr-$(LIBMPFR_VERSION).tar.bz2