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 $(top_srcdir)/$(CONFIGURE): $(addprefix $(top_srcdir)/,$(CONFIGURE_ACS))
28 cd $(top_srcdir) && autoconf
30 $(CONFIG_STATUS): $(top_srcdir)/$(CONFIGURE)
31 ./$(CONFIG_STATUS) --recheck
33 # Normally, generate will add all the inputs to MAKEFILE_TEMPLATES.
34 MAKEFILE_TEMPLATES += $(addprefix $(top_srcdir)/, $(addsuffix .in, \
35 @_SUBDIRMK_MAKEFILES@ \
38 main.mk $(MAKEFILES): .makefiles.stamp ;
40 $(top_srcdir)/subdirmk/generate \
43 # This filtering arranges that we can often run config.status to
44 # generate only particular output files. We look for *inputs* that
45 # have changed. If the only inputs that have changed are ones that we
46 # know affect only one output (Subdir.mk.in and regen.mk.in), we pass
47 # config.status the corresponding output file names. Otherwise we
48 # pass nothing and config.status does them all. We need to mention
49 # regen.mk.in twice because if $(top_srcdir) is `.', make elides the
50 # directory part from $?.
51 ./$(CONFIG_STATUS) $(if \
52 $(filter-out Subdir.sd.mk %/Subdir.sd.mk \
55 $(patsubst $(top_srcdir)/%,%, $(sort \
56 $(patsubst %.sd.mk,%.mk,$(filter %.sd.mk,$?)) \
57 $(patsubst %.mk.in,%.mk,$(filter %.mk.in,$?)))))
61 $(RM) config.status config.log
62 $(RM) main.mk $(MAKEFILES) @_SUBDIRMK_MAKEFILES@
63 $(RM) $(addsuffix Makefile,$(dir $(MAKEFILES)))
65 -include $(ALL_DEPFILES)