running binary-dist without having BIN_DIST set is now a no-no, I believe.
BIN_DIST_TMPDIR=$(FPTOOLS_TOP_ABS)
binary-dist-pre::
+ifeq "$(BIN_DIST)" ""
+ echo "WARNING: To run the binary-dist target, you need to set BIN_DIST=1 in your build.mk" && exit 1
+endif
-rm -rf $(BIN_DIST_TMPDIR)/$(BIN_DIST_NAME)
-rm -f $(BIN_DIST_TMPDIR)/$(BIN_DIST_NAME).tar.gz
@for i in $(BIN_DIST_DIRS); do \