X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ian/git?p=subdirmk.git;a=blobdiff_plain;f=regen.mk.in;h=11e8a32f8e725547f58d6c183839320f53f04d03;hp=83952c9e648527eaf74b85b1c68317f13718ef50;hb=a4d9f732b93f499b96e3a52459c5f7d2366da14a;hpb=25a516a59e7811b8626b5fe40b49c5ef942db697

diff --git a/regen.mk.in b/regen.mk.in
index 83952c9..11e8a32 100644
--- a/regen.mk.in
+++ b/regen.mk.in
@@ -24,18 +24,24 @@ CONFIG_STATUS	?= config.status
 CONFIGURE_ACS	+= $(CONFIGURE_AC)
 CONFIGURE_ACS	+= subdirmk/subdirmk.ac
 
+# To turn on debugging here, export SUBDIRMK_REGEN_NDEBUG=''
+SUBDIRMK_REGEN_NDEBUG ?= @
+
 $(top_srcdir)/$(CONFIGURE): $(addprefix $(top_srcdir)/,$(CONFIGURE_ACS))
 	cd $(top_srcdir) && autoconf
 
 $(CONFIG_STATUS): $(top_srcdir)/$(CONFIGURE)
 	./$(CONFIG_STATUS) --recheck
 
-# Normally, generate will add all the inputs to MAKEFILE_TEMPLATES.
+# generate will add all its own inputs and outputs to these variables
+SUBDIRMK_MAKEFILES += @_SUBDIRMK_MAKEFILES@
 MAKEFILE_TEMPLATES += $(addprefix $(top_srcdir)/, $(addsuffix .in, \
 	@_SUBDIRMK_MAKEFILES@ \
 	))
 
-main.mk $(MAKEFILES): .makefiles.stamp ;
+main.mk $(SUBDIRMK_MAKEFILES) $(CONFIG_STATUS_OUTPUTS): .makefiles.stamp
+	$(SUBDIRMK_REGEN_NDEBUG): REGEN STAMP CAUSES TARGET=$@
+
 .makefiles.stamp:						\
 		$(top_srcdir)/subdirmk/generate			\
 		$(CONFIG_STATUS)				\
@@ -43,11 +49,12 @@ main.mk $(MAKEFILES): .makefiles.stamp ;
 # This filtering arranges that we can often run config.status to
 # generate only particular output files.  We look for *inputs* that
 # have changed.  If the only inputs that have changed are ones that we
-# know affect only one output (Subdir.mk.in and regen.mk.in), we pass
+# know affect only one output (Subdir.sd.mk and *.mk.in), we pass
 # config.status the corresponding output file names.  Otherwise we
 # pass nothing and config.status does them all.  We need to mention
-# regen.mk.in twice because if $(top_srcdir) is `.', make elides the
+# Subdir.sd.mk twice because if $(top_srcdir) is `.', make elides the
 # directory part from $?.
+	$(SUBDIRMK_REGEN_NDEBUG): REGEN STAMP WANTS DEPS=$?
 	./$(CONFIG_STATUS) $(if					\
 		$(filter-out Subdir.sd.mk %/Subdir.sd.mk	\
 			     %.mk.in				\
@@ -59,7 +66,7 @@ main.mk $(MAKEFILES): .makefiles.stamp ;
 
 realclean:: clean
 	$(RM) config.status config.log
-	$(RM) main.mk $(MAKEFILES) @_SUBDIRMK_MAKEFILES@
-	$(RM) $(addsuffix Makefile,$(dir $(MAKEFILES)))
+	$(RM) main.mk $(SUBDIRMK_MAKEFILES) @_SUBDIRMK_MAKEFILES@
+	$(RM) $(addsuffix Makefile,$(dir $(SUBDIRMK_MAKEFILES)))
 
 -include $(ALL_DEPFILES)