regen.mk.in: Clarify documentation about realclean

It's not sensible to `make [the provided] realclean:: into a recursive
target' in that sense since the one we provide is effective, and
present, only in the toplevel.  What we mean is that you can make your
own realclean target and regen.mk's will fit in nicely.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/regen.mk.in b/regen.mk.in
index 7826ff224c26eb4eb63e9de41fe5b23e7f754834..06b2fbd08e1ce6fa56b100cbd3422fcf6d34d7df 100644 (file)
--- a/regen.mk.in
+++ b/regen.mk.in
@@ -20,8 +20,8 @@
 # of regen.mk).
 #
 # Also provides a `realclean::' target at the toplevel which deletes
-# the autoconf output.  This may be made into a recursive target
-# by mentioning &TARGETS_realclean in appropriate .sd.mk.
+# the autoconf output.  (This is suitable for being part of a recursive
+# target creaed by setting &TARGETS_realclean in appropriate .sd.mk.)
 
 CONFIGURE      ?= configure
 CONFIGURE_AC   ?= $(CONFIGURE).ac