LOAD_PATH=. /usr/share/emacs/site-lisp $(HOME)/.emacs.d/site-lisp
EMACS=emacs $(addprefix -L ,$(LOAD_PATH))
MODE=644

FG_BLU=\033[0;34m
FG_YEL=\033[0;33m
FG_GRE=\033[0;32m
FG_RED=\033[0;31m
CLR_RE=\033[0;00m

compile = $(EMACS) -Q -batch -eval "(byte-compile-file \"$(1)\")"
define newer =
$(shell if [ "$(1)" -nt "$(DESTDIR)/$(1)" ]; then echo "newer"; fi)
endef
define older =
$(shell if [ "$(1)" -ot "$(DESTDIR)/$(1)" ]; then echo "older"; fi)
endef

install-objects=$(addprefix install-,$(objects))
uninstall-objects=$(addprefix uninstall-,$(objects))
check-objects=$(addprefix check-,$(objects))

install-modules=$(addprefix install-,$(modules))
uninstall-modules=$(addprefix uninstall-,$(modules))
check-modules=$(addprefix check-,$(modules))

.PHONY: all install uninstall check uninstall $(modules) \
	$(install-objects) $(uninstall-objects) $(check-objects) \
	$(install-modules) $(uninstall-modules) $(check-modules)
all: $(modules) $(objects)
install: $(install-modules) $(install-objects)
check: $(check-modules) $(check-objects)
uninstall: $(uninstall-modules) $(uninstall-objects)

$(modules): %:
	@echo $(MAKEFILES)
	@$(MAKE) -C $*

$(install-objects): install-%: %
	$(if $(call newer,$*), \
		install -pDm $(MODE) "$*" "$(DESTDIR)/$*")

$(install-modules): install-%:
	@$(MAKE) -C $* install

$(uninstall-objects): uninstall-%:
	$(if $(call newer,$*),rm -f "$(DESTDIR)/$*")

$(uninstall-modules): uninstall-%:
	@$(MAKE) -C $* uninstall

$(check-objects): check-%:
	@$(if $(call newer,$*), \
		echo -e "$(FG_YEL)$* $(FG_GRE)newer$(CLR_RE)!", \
		$(if $(call older,$*), \
			echo -e "$(FG_YEL)$* $(FG_RED)older$(CLR_RE)."))

$(check-modules): check-%:
	@$(MAKE) -C $* check

$(filter %.elc,$(objects)): %.elc: %.el
	$(call compile,$^)