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diff --git a/mk/recurse.mk b/mk/recurse.mk
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+++ b/mk/recurse.mk
@@ -0,0 +1,101 @@
+
+##################################################################
+#
+# 		Recursive stuff
+#
+##################################################################
+
+# Here are the diabolically clever rules that
+# 
+# (a) for each "recursive target" <t>
+#     propagates "make <t>" to directories in SUBDIRS
+#
+# (b) when SUBDIRS is empty,
+#     for each "multi-way-target" <t>
+#     calls "make way=w <t>" for each w in $(WAYS)
+#
+#     This has the effect of making the standard target
+#     in each of the specified ways (as well as in the normal way
+
+# Controlling variables
+#	WAYS    = extra (beyond the normal way) ways to build things in
+# 	SUBDIRS = subdirectories to recurse into
+
+# No ways, so iterate over the SUBDIRS
+
+# note about recursively invoking make: we'd like make to drop all the
+# way back to the top level if it fails in any of the
+# sub(sub-...)directories.  This is done by setting the -e flag to the
+# shell during the loop, which causes an immediate failure if any of
+# the shell commands fail.
+
+# One exception: if the user gave the -i or -k flag to make in the
+# first place, we'd like to reverse this behaviour.  So we check for
+# these flags, and set the -e flag appropriately.  NOTE: watch out for
+# the --no-print-directory flag which is passed to recursive
+# invocations of make.
+#
+ifeq "$(way)" ""
+ifneq "$(SUBDIRS)" ""
+
+# we override the 'boot', 'all' and 'install' targets in the top
+# level Makefile. Some of the sub-projects also set 'boot' to empty.
+
+ifeq "$(NO_ALL_TARGET)" "YES"
+ALL_TARGET     =
+else
+ALL_TARGET     = all
+endif
+
+ifeq "$(NO_BOOT_TARGET)" "YES"
+BOOT_TARGET    =
+else
+BOOT_TARGET    = boot
+endif
+
+ifeq "$(NO_INSTALL_TARGET)" "YES"
+INSTALL_TARGET =
+INSTALL_DOCS_TARGET =
+else
+INSTALL_TARGET = install
+INSTALL_DOCS_TARGET = install-docs
+endif
+
+$(ALL_TARGET) docs runtests $(BOOT_TARGET) TAGS clean distclean mostlyclean maintainer-clean $(INSTALL_TARGET) $(INSTALL_DOCS_TARGET) html chm HxS ps dvi txt::
+	@echo "------------------------------------------------------------------------"
+	@echo "== Recursively making \`$@' in $(SUBDIRS) ..."
+	@echo "PWD = $(shell pwd)"
+	@echo "------------------------------------------------------------------------"
+# Don't rely on -e working, instead we check exit return codes from sub-makes.
+	@case '${MFLAGS}' in *-[ik]*) x_on_err=0;; *-r*[ik]*) x_on_err=0;; *) x_on_err=1;; esac; \
+	if [ $$x_on_err -eq 0 ]; \
+	    then echo "Won't exit on error due to MFLAGS: ${MFLAGS}"; \
+	fi; \
+	for i in $(SUBDIRS); do \
+	  echo "------------------------------------------------------------------------"; \
+	  echo "== $(MAKE) $@ $(MFLAGS);"; \
+	  echo " in $(shell pwd)/$$i"; \
+	  echo "------------------------------------------------------------------------"; \
+	  $(MAKE) --no-print-directory -C $$i $(MFLAGS) $@; \
+	  if [ $$? -eq 0 -o $$x_on_err -eq 0 ]; \
+	      then echo "Finished making $@ in $$i": $$?; \
+	      else echo "Failed making $@ in $$i": $$?; exit 1; \
+	  fi; \
+	done
+	@echo "------------------------------------------------------------------------"
+	@echo "== Finished making \`$@' in $(SUBDIRS) ..."
+	@echo "PWD = $(shell pwd)"
+	@echo "------------------------------------------------------------------------"
+
+endif
+endif
+
+#
+# Selectively building subdirectories.
+#
+#
+ifneq "$(SUBDIRS)" ""
+$(SUBDIRS) ::
+	  $(MAKE) -C $@ $(MFLAGS)
+endif
+