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+# Copyright (C) 2015-2016 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 $(topsrcdir)/common.each.tail.mk
+
+
+# Aggregate variables
+
+# Add some more defaults to the *_files variables
+$(_am)clean_files += $($(_am)gen_files) $($(_am)out_files)
+$(_am)cfg_files += Makefile
+
+# Now namespace the *_files variables
+define _am_save_variables
+_am_src_files/$(outdir) = $(addprefix $(srcdir)/,$($(_am)src_files))
+_am_gen_files/$(outdir) = $(addprefix $(srcdir)/,$($(_am)gen_files))
+_am_cfg_files/$(outdir) = $(addprefix $(outdir)/,$($(_am)cfg_files))
+_am_out_files/$(outdir) = $(addprefix $(outdir)/,$($(_am)out_files))
+_am_sys_files/$(outdir) = $(addprefix $(DESTDIR),$($(_am)sys_files))
+_am_clean_files/$(outdir) = $(addprefix $(outdir)/,$($(_am)clean_files))
+_am_slow_files/$(outdir) = $(addprefix $(outdir)/,$($(_am)slow_files))
+_am_subdirs/$(outdir) = $($(_am)subdirs)
+endef
+$(eval $(_am_save_variables))
+
+# And add them to the $(parent)_*_files variables (if applicable)
+define _am_add_subdir
+_am_src_files/%(outdir) += $(_am_src_files/%(subdir))
+_am_gen_files/%(outdir) += $(_am_gen_files/%(subdir))
+_am_cfg_files/%(outdir) += $(_am_cfg_files/%(subdir))
+_am_out_files/%(outdir) += $(_am_out_files/%(subdir))
+_am_sys_files/%(outdir) += $(_am_sys_files/%(subdir))
+_am_clean_files/%(outdir) += $(_am_clean_files/%(subdir))
+_am_slow_files/%(outdir) += $(_am_slow_files/%(subdir))
+endef
+$(foreach subdir,$(call _am_path,$(addprefix $(outdir)/,$($(_am)subdirs))),$(eval $(subst %(outdir),$(outdir),$(subst %(subdir),$(subdir),$(value _am_add_subdir)))))
+
+_am_outdirs := $(_am_outdirs) $(outdir)
+
+
+# Do some per-directory magic
+
+_am_phony = build install uninstall mostlyclean clean distclean maintainer-clean check
+
+.PHONY: $(addprefix $(outdir)/,$(_am_phony))
+
+$(addprefix $(outdir)/,uninstall mostlyclean clean distclean maintainer-clean)::
+ $(RM) -- $(sort $(_am_$(@F)/$(@D)))
+ $(RMDIRS) $(sort $(dir $(_am_$(@F)/$(@D)))) 2>/dev/null || $(TRUE)
+
+# 'build' and 'install' must be defined later, because the
+# am_*_files/* variables might not be complete yet.
+
+
+# Include Makefiles from other directories
+
+define _am_nl
+
+
+endef
+
+$(foreach _am_NO_ONCE,y,\
+ $(foreach makefile,$(foreach dir,$($(_am)subdirs) $($(_am)depdirs),$(call _am_path,$(outdir)/$(dir)/Makefile)),\
+ $(eval include $(filter-out $(_am_included_makefiles),$(makefile)))))
+
+
+# This only gets evaluated once, after all of the other Makefiles are read
+ifeq ($(_am_NO_ONCE),)
+# Empty directory-level variables
+outdir = /bogus
+srcdir = /bogus
+
+$(_am)subdirs =
+$(_am)depdirs =
+
+$(_am)src_files =
+$(_am)gen_files =
+$(_am)cfg_files =
+$(_am)out_files =
+$(_am)sys_files =
+$(_am)clean_files =
+$(_am)slow_files =
+
+_am_clean_files/$(topoutdir) += $(topoutdir)/$(PACKAGE)-$(VERSION).tar.gz
+$(addprefix $(topoutdir)/,mostlyclean clean distclean maintainer-clean) ::
+ $(RM) -r -- $(topoutdir)/$(PACKAGE)-$(VERSION)
+
+define _am_directory_rules
+# Constructive phony targets
+$(outdir)/build : $(_am_out_files/%(outdir))
+$(outdir)/install: $(_am_sys_files/%(outdir))
+# Destructive phony targets
+_am_uninstall/%(outdir) = $(_am_sys_files/%(outdir))
+_am_mostlyclean/%(outdir) = $(filter-out $(_am_slow_files/%(outdir)) $(_am_cfg_files/%(outdir)) $(_am_gen_files/%(outdir)),$(_am_clean_files/%(outdir)))
+_am_clean/%(outdir) = $(filter-out $(_am_cfg_files/%(outdir)) $(_am_gen_files/%(outdir)),$(_am_clean_files/%(outdir)))
+_am_distclean/%(outdir) = $(filter-out $(_am_gen_files/%(outdir)),$(_am_clean_files/%(outdir)))
+_am_maintainer-clean/%(outdir) = $(_am_clean_files/%(outdir))
+endef
+$(foreach outdir,$(_am_outdirs),$(eval $(subst %(outdir),$(outdir),$(value _am_directory_rules))))
+
+# Add the `dist` target
+.PHONY: dist
+dist: $(topoutdir)/$(PACKAGE)-$(VERSION).tar.gz
+$(topoutdir)/$(PACKAGE)-$(VERSION).tar.gz: $(topoutdir)/$(PACKAGE)-$(VERSION)
+ $(TAR) czf $@ -C $(<D) $(<F)
+_am_copyfile = $(MKDIRS) $(dir $2) && $(CP) -T $1 $2
+_am_addfile = $(call _am_copyfile,$3,$2/$(call _am_relto,$1,$3))
+$(topoutdir)/$(PACKAGE)-$(VERSION): $(_am_src_files/$(topoutdir)) $(_am_gen_files/$(topoutdir))
+ $(RM) -r $@
+ @PS4='' && set -x && \
+ $(MKDIR) $(@D)/tmp.$(@F).$$$$ && \
+ $(foreach f,$^,$(call _am_addfile,$(topsrcdir),$(@D)/tmp.$(@F).$$$$,$f) &&) \
+ $(MV) $(@D)/tmp.$(@F).$$$$ $@ || $(RM) -r $(@D)/tmp.$(@F).$$$$
+
+include $(topsrcdir)/common.once.tail.mk
+
+# For some reason I can't explain, RM doesn't really get set with ?=
+CP ?= cp
+MKDIR ?= mkdir
+MKDIRS ?= mkdir -p
+MV ?= mv
+RM = rm -f
+RMDIRS ?= rmdir -p
+TAR ?= tar
+TRUE ?= true
+
+.PHONY: noop
+endif