1 # subdirmk - rules for regenerating makefiles etc.
2 # Copyright 2019 Mark Wooding
3 # Copyright 2019 Ian Jackson
4 # SPDX-License-Identifier: LGPL-2.0-or-later
7 # include subdirmk/regen.mk
8 # (probably in toplevel Subdir.sd.mk)
10 # Arranges that config.status is automatically rerun to update
11 # makefiles from templates, whenever a template *.sd.mk or *.mk.in is
12 # edited; and that autoconf is rerun if configure's inputs are edited.
14 # If you add includes to configure.ac, add them to CONFIGURE_ACS.
16 # Also provides a `realclean::' target at the toplevel which deletes
17 # the autoconf output. This may be made into a recursive target
18 # by mentioning &TARGETS_realclean in appropriate .sd.mk.
20 CONFIGURE ?= configure
21 CONFIGURE_AC ?= $(CONFIGURE).ac
22 CONFIG_STATUS ?= config.status
24 CONFIGURE_ACS += $(CONFIGURE_AC)
25 CONFIGURE_ACS += subdirmk/subdirmk.ac
27 # To turn on debugging here, export SUBDIRMK_REGEN_NDEBUG=''
28 SUBDIRMK_REGEN_NDEBUG ?= @
30 $(top_srcdir)/$(CONFIGURE): $(addprefix $(top_srcdir)/,$(CONFIGURE_ACS))
31 cd $(top_srcdir) && autoconf
33 $(CONFIG_STATUS): $(top_srcdir)/$(CONFIGURE)
34 ./$(CONFIG_STATUS) --recheck
36 # Normally, generate will add all the inputs to MAKEFILE_TEMPLATES.
37 MAKEFILE_TEMPLATES += $(addprefix $(top_srcdir)/, $(addsuffix .in, \
38 @_SUBDIRMK_MAKEFILES@ \
41 main.mk $(SUBDIRMK_MAKEFILES) $(CONFIG_STATUS_OUTPUTS): .makefiles.stamp
42 $(SUBDIRMK_REGEN_NDEBUG): REGEN STAMP CAUSES TARGET=$@
45 $(top_srcdir)/subdirmk/generate \
48 # This filtering arranges that we can often run config.status to
49 # generate only particular output files. We look for *inputs* that
50 # have changed. If the only inputs that have changed are ones that we
51 # know affect only one output (Subdir.sd.mk and *.mk.in), we pass
52 # config.status the corresponding output file names. Otherwise we
53 # pass nothing and config.status does them all. We need to mention
54 # Subdir.sd.mk twice because if $(top_srcdir) is `.', make elides the
55 # directory part from $?.
56 $(SUBDIRMK_REGEN_NDEBUG): REGEN STAMP WANTS DEPS=$?
57 ./$(CONFIG_STATUS) $(if \
58 $(filter-out Subdir.sd.mk %/Subdir.sd.mk \
61 $(patsubst $(top_srcdir)/%,%, $(sort \
62 $(patsubst %.sd.mk,%.mk,$(filter %.sd.mk,$?)) \
63 $(patsubst %.mk.in,%.mk,$(filter %.mk.in,$?)))))
67 $(RM) config.status config.log
68 $(RM) main.mk $(SUBDIRMK_MAKEFILES) @_SUBDIRMK_MAKEFILES@
69 $(RM) $(addsuffix Makefile,$(dir $(SUBDIRMK_MAKEFILES)))
71 -include $(ALL_DEPFILES)