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 Dir.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 # Makefiles updated by config.status and passed to SUBDIRMK_MAKEFILES
17 # in configure.ac are automatically handled too. If you have other
18 # files updated by config.status (eg, the output of autoheader) you
19 # need to put them in CONFIG_STATUS_OUTPUTS (before your inclusion
22 # Also provides a `realclean::' target at the toplevel which deletes
23 # the autoconf output. (This is suitable for being part of a recursive
24 # target creaed by setting &TARGETS_realclean in appropriate .sd.mk.)
26 CONFIGURE ?= configure
27 CONFIGURE_AC ?= $(CONFIGURE).ac
28 CONFIG_STATUS ?= config.status
30 CONFIGURE_ACS += $(CONFIGURE_AC)
31 CONFIGURE_ACS += subdirmk/subdirmk.ac
33 # To turn on debugging here, export SUBDIRMK_REGEN_NDEBUG=''
34 SUBDIRMK_REGEN_NDEBUG ?= @
36 $(top_srcdir)/$(CONFIGURE): $(addprefix $(top_srcdir)/,$(CONFIGURE_ACS))
37 cd $(top_srcdir) && autoconf
39 $(CONFIG_STATUS): $(top_srcdir)/$(CONFIGURE)
40 ./$(CONFIG_STATUS) --recheck
42 # generate will add all its own inputs and outputs to these variables
43 SUBDIRMK_MAKEFILES += @_SUBDIRMK_MAKEFILES@
44 MAKEFILE_TEMPLATES += $(addprefix $(top_srcdir)/, $(addsuffix .in, \
45 @_SUBDIRMK_MAKEFILES@ \
48 main.mk $(SUBDIRMK_MAKEFILES) $(CONFIG_STATUS_OUTPUTS): .makefiles.stamp
49 $(SUBDIRMK_REGEN_NDEBUG): REGEN STAMP CAUSES TARGET=$@
52 $(top_srcdir)/subdirmk/generate \
55 # This filtering arranges that we can often run config.status to
56 # generate only particular output files. We look for *inputs* that
57 # have changed. If the only inputs that have changed are ones that we
58 # know affect only one output (Dir.sd.mk, Final.sd.mk and *.mk.in),
59 # we pass config.status the corresponding output file names.
60 # Otherwise we pass nothing and config.status does them all. We need
61 # to mention Dir.sd.mk twice because if $(top_srcdir) is `.', make
62 # elides the directory part from $?. Similarly but not identically
64 $(SUBDIRMK_REGEN_NDEBUG): REGEN STAMP WANTS DEPS=$?
65 ./$(CONFIG_STATUS) $(if \
66 $(filter-out Dir.sd.mk %/Dir.sd.mk \
67 Final.sd.mk $(top_srcdir)/Final.sd.mk \
70 $(patsubst $(top_srcdir)/%,%, $(sort \
71 $(patsubst %.sd.mk,%.mk,$(filter %.sd.mk,$?)) \
72 $(patsubst %.mk.in,%.mk,$(filter %.mk.in,$?)))))
76 $(RM) config.status config.log
77 $(RM) main.mk $(SUBDIRMK_MAKEFILES) @_SUBDIRMK_MAKEFILES@
78 $(RM) $(addsuffix Makefile,$(dir $(SUBDIRMK_MAKEFILES)))
80 -include $(ALL_DEPFILES)