#[ Rules and Depends ]##################################################{{{#

AUTO_DEPENDS += filter_c
filter_c = $(addprefix $2/,$(patsubst %.c,%.o,$(filter %.c,$1)))

# this is some ad-hoc last resort dependency method
%.a: FORCE
	@$(MAKE) -q -rC $(dir $(@D)) $(_cobjs)/$(@F) || $(MAKE) -rC $(dir $(@D)) $(_cobjs)/$(@F)

# this implicit rule is used to force directory existence, without depending
# on the directory itself, since its mtime changes too often.
%/.exists: Makefile $(CONFDIR)/$(wildcard *.mk)
	@$(RM) -r $*
	@-mkdir -p $*
	@touch $@
# We don't want make to remove these files because of default rules.
.PRECIOUS: %/.exists

define RULE_C_tpl
$(_cobjs)/$1/%.o: %.c $(_cobjs)/$1/.exists
	$(CC) $$(CFLAGS) $$($1_CPPFLAGS) $2 -MMD -MT "$$(@D)/$$*.d $$(@D)/$$*.o" -MF $$(@D)/$$*.d -g -c -o $$@ $$<

$(_cobjs)/$1/%.d: %.c $(_cobjs)/$1/.exists
	@$(CPP) $$(CFLAGS) $$($1_CPPFLAGS) $2 -MM -MT "$$(@D)/$$*.d $$(@D)/$$*.o" -MF $$(@D)/$$*.d $$<

-include $$(wildcard $(_cobjs)/$1/*.d) /dev/null
endef

########################################################################}}}#
#[ Classes ]############################################################{{{#

deps_create = $(foreach f,$(AUTO_DEPENDS),$(call $f,$1,$2))

install-LIBRARIES/%::
	mkdir -p $($*dir)
	cp $($*_LIBRARIES:=.so) $($*dir)

uninstall-LIBRARIES/%::
	rm -f $(patsubst %,$($*dir)/%.so,$($*_LIBRARIES))
	rmdir -p $($*dir) || true 2> /dev/null

define CLASS_LIBRARIES_tpl
all:: $1.so
install-LIBRARIES/$2:: $1.so

install:: install-LIBRARIES/$2
uninstall:: uninstall-LIBRARIES/$2

$1.so: $(_cobjs)/$1/.exists $$(call deps_create,$$($1_SOURCES),$(_cobjs)/$1)
	$(CC) $$(CFLAGS) $$($1_CPPFLAGS) -fPIC -shared -o $$@ \
	    $$(filter %.o,$$^) $$(LDFLAGS) $$($1_LDFLAGS) $$($1_LIBADD)

$$(eval $$(call RULE_C_tpl,$1,-fPIC))

clean::
	$(RM) $1.so
endef
$(foreach v,$(filter %_LIBRARIES,$(.VARIABLES)), \
            $(foreach x,$($v),$(eval $(call CLASS_LIBRARIES_tpl,$x,$(v:_LIBRARIES=)))))


install-DATA/%::
	mkdir -p $($*dir)
	cp $($*_DATA) $($*dir)

uninstall-DATA/%::
	rm -f $(patsubst %,$($*dir)/%,$($*_DATA))
	rmdir -p $($*dir) || true 2> /dev/null

define CLASS_DATA_tpl
install:: install-DATA/$2
uninstall:: uninstall-DATA/$2
endef
$(foreach v,$(filter %_DATA,$(.VARIABLES)), \
            $(foreach x,$($v),$(eval $(call CLASS_DATA_tpl,$x,$(v:_DATA=)))))

#define CLASS_EXE_tpl
#all:: $1
#$1: $(_cobjs)/$1/.exists $$(call deps_create,$$($1_SOURCES),$(_cobjs)/$1)
#	$(CC) -o $$@ $$(CFLAGS) $$($1_CPPFLAGS) $$(filter %.o,$$^) \
#	         $$(LDFLAGS) $$($1_LDFLAGS) $$(filter %.a,$$^)
#
#$$(eval $$(call RULE_C_tpl,$1,$2))
#
#clean::
#	$(RM) $1
#endef
#$(foreach x,$(__EXE__),$(eval $(call CLASS_EXE_tpl,$x,)))

########################################################################}}}#
#[ Candy ]##############################################################{{{#

echo-root:
	@echo $(DEPTH)

echo-tags:
	@echo $(DEPTH)/.tags

ifeq (".","$(DEPTH)")
tags:
	ctags -o .$@ --recurse=yes --exclude=.svn --exclude=\*.mk --totals=yes;

distclean clober::
	$(RM) -f .tags
else
tags:
	$(MAKE) -C $(DEPTH) $@
endif

.PHONY: tags

########################################################################}}}#

all check clobber distclean::
	@set -e $(patsubst %,; $(MAKE) -rC % $@,$(SUBDIRS))

CLEAN_RECURSE=1
clean::
	$(RM) -r $(_cobjs) $(CLEANFILES)
	@$(if $(CLEAN_RECURSE),$(patsubst %,$(MAKE) -rC % $@;,$(SUBDIRS)))

clobber distclean:: CLEAN_RECURSE=
clobber distclean:: clean
	$(RM) -r .objs* $(DISTCLEANFILES)

ifeq (".","$(DEPTH)")
clobber distclean::
	$(RM) $(patsubst %.in,%,$(wildcard $(CONFDIR)/*.in))
endif

.PHONY: all check clean clobber distclean install FORCE