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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/>.
+
+# Make directories
+dirs += $(addprefix $(DESTDIR),$(bindir) $(libexedir) $(datarootdir) $(datadir) $(sysconfdir) $(sharedstatedir) $(localstatedir) $(runstatedir) $(pkgdatadir) $(pkglibexecdir))
+$(sort $(dirs)):
+ $(MKDIRS) $@
+
+# Have GCC generate header dependency info (pair this with `-include`
+# in common.each.mk
+ifneq ($(AUTODEPS),)
+CFLAGS += -MD -MF $(patsubst $(@D)/%.o,$(@D)/.%.mk,$@) -MP
+endif
+
+CPPFLAGS += -I$(topobjdir)
+M4FLAGS += -I$(topobjdir)
+
+all_clean_files += $(topobjdir)/config.sh $(topobjdir)/config.h
+config_vars = $(shell $(SED) -n 's/^\s*\([a-z][^ !?:=]*\).*=.*/\1/p' $(topobjdir)/config.mk) PACKAGE VERSION DESTDIR
+$(topobjdir)/config.sh: $(topobjdir)/config.mk
+ $(PRINTF) '%s=%s\n' $(foreach v,$(config_vars),$v $($v)) | LC_ALL=C $(SORT) > $@
+$(topobjdir)/config.h: $(topobjdir)/config.sh
+ . $(abspath $<) && $(PRINTF) '#define %s "%s"\n' $(foreach v,$(config_vars),$v '$($v)') PACKAGE_UPPER $${PACKAGE^^} | LC_ALL=C $(SORT) > $@
+
+# Should be on by default
+.DELETE_ON_ERROR: