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# Copyright (C) 2015 Luke Shumaker
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
include $(topsrcdir)/common.each.mk
# Aggregate variables
# Add some more defaults to the *_files variables
clean_files += $(obj_files)
conf_files += Makefile $(topobjdir)/config.mk
# Now namespace the *_files variables
$(module)_src_files := $(addprefix $(srcdir)/,$(src_files))
$(module)_obj_files := $(addprefix $(objdir)/,$(obj_files))
$(module)_sys_files := $(addprefix $(DESTDIR)/,$(sys_files))
$(module)_clean_files := $(addprefix $(objdir)/,$(clean_files))
$(module)_slow_files := $(addprefix $(objdir)/,$(slow_files))
$(module)_conf_files := $(addprefix $(objdir)/,$(conf_files))
$(module)_dist_files := $(addprefix $(objdir)/,$(dist_files))
# And add them to the $(parent)_*_files variables (if applicable)
ifneq ($(parent),)
$(parent)_src_files := $($(parent)_src_files) $($(module)_src_files)
$(parent)_obj_files := $($(parent)_obj_files) $($(module)_obj_files)
$(parent)_sys_files := $($(parent)_sys_files) $($(module)_sys_files)
$(parent)_clean_files := $($(parent)_clean_files) $($(module)_clean_files)
$(parent)_slow_files := $($(parent)_slow_files) $($(module)_slow_files)
$(parent)_conf_files := $($(parent)_conf_files) $($(module)_conf_files)
$(parent)_dist_files := $($(parent)_dist_files) $($(module)_dist_files)
endif
modules := $(modules) $(module)
# Include Makefiles from other directories
define _nl
endef
define _include_makefile
ifeq ($(filter $(abspath $1),$(included_makefiles)),)
include $(if $(call _is_subdir,.,$1),$(call _relto,.,$1),$(topobjdir)/$(call _relto,$(topobjdir),$1))
endif
endef
$(eval \
_COMMON_MK_NOONCE = n$(_nl)\
$(foreach dir,$(subdirs),parent=$(module)$(_nl)$(call _include_makefile,$(objdir)/$(dir)/Makefile)$(_nl))\
parent=dep$(_nl)\
$(call _include_makefile,$(topobjdir)/$(dir)/Makefile)$(_nl)\
_COMMON_MK_NOONCE = $(_COMMON_MK_NOONCE))
# This only gets evaluated once, after all of the other Makefiles are read
ifeq ($(_COMMON_MK_NOONCE),)
# Empty module-level variables
objdir = /bogus
srcdir = /bogus
subdirs =
depdirs =
src_files =
obj_files =
sys_files =
clean_files =
slow_files =
conf_files =
dist_files =
# Declare phony targets
.phony = build install uninstall mostlyclean clean distclean maintainer-clean check
define module_rules
.PHONY: $(addsuffix -%(module),$(.phony))
# Constructive phony targets
build-%(module): $(%(module)_obj_files)
install-%(module): $(%(module)_sys_files)
# Destructive phony targets
_%(module)_uninstall = $(%(module)_sys_files))
_%(module)_mostlyclean = $(filter-out $(%(module)_slow_files) $(%(module)_conf_files) $(%(module)_dist_files),$(%(module)_clean_files))
_%(module)_clean = $(filter-out $(%(module)_conf_files) $(%(module)_dist_files),$(%(module)_clean_files))
_%(module)_distclean = $(filter-out $(%(module)_dist_files),$(%(module)_clean_files))
_%(module)_maintainer-clean = $(%(module)_clean_files)
uninstall-%(module) mostlyclean-%(module) clean-%(module) distclean-%(module) maintainer-clean-%(module): %-%(module):
$(RM) -- $(sort $(_%(module)_$*))
$(RMDIRS) $(sort $(dir $(_%(module)_$*))) 2>/dev/null || $(TRUE)
endef
$(foreach module,$(modules),$(eval $(subst %(module),$(module),$(value module_rules))))
# Alias each bare phony target to itself with the `-all` suffix
$(foreach t,$(.phony),$(eval $t: $t-all))
# Add the `dist` target
.PHONY: dist
dist: $(topobjdir)/$(PACKAGE)-$(VERSION).tar.gz
$(topobjdir)/$(PACKAGE)-$(VERSION).tar.gz: $(topobjdir)/$(PACKAGE)-$(VERSION)
$(TAR) czf $@ -C $(<D) $(<F)
_copyfile = $(MKDIRS) $(dir $2) && $(CP) $1 $2
_addfile = $(call _copyfile,$3,$2/$(call _relto,$1,$3))
$(topobjdir)/$(PACKAGE)-$(VERSION): $(all_src_files) $(dep_src_files) $(all_dist_files) $(dep_dist_files)
$(RM) -r $@
$(MKDIR) $(@D)/tmp.$(@F).$$$$ && \
$(foreach f,$(all_src_files) $(dep_src_files) ,$(call _addfile,$(topsrcdir),$(@D)/tmp.$(@F).$$$$,$f) &&) \
$(foreach f,$(all_dist_files) $(dep_dist_files),$(call _addfile,$(topobjdir),$(@D)/tmp.$(@F).$$$$,$f) &&) \
$(MV) $(@D)/tmp.$(@F).$$$$ $@ || $(RM) -r $(@D)/tmp.$(@F).$$$$
include $(topsrcdir)/common.once.mk
endif
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