# NOTE: due to suckage of make that I can't figure out how to work
# around, you'll have to run make twice after you update a .cdl file
# in order to make sure that any code that includes the generated
# headers has been rebuilt.  This is despite having an explicit
# dependency of the .cc file on the normal .h, of the normal .h on
# the generated .h, of the generated headers on the server directory,
# and of the server directory on the CDL file.  The CDL->directory rule
# is used to generated the headers, but even if it's done specifically
# for the .cc file up the chain, it doesn't rebuild the .cc file.

include ../../Makefile.target
TOP := $(shell pwd)

INCS := -Iinclude -I../include/c++ -I../include/generated/c++ \
        -I../include/c

DEFS += -D_KERNEL

CXXFLAGS += $(INCS) $(DEFS) -Wall -Werror -O3 -g3 -fno-rtti \
            -fno-exceptions -fno-builtin

ASFLAGS += $(INCS)

.PHONY: symlinks all default rerun dep servers clean distclean

all: default

symlinks:
	rm -f include/arch
	ln -sfn arch-$(ARCH) include/arch

# Make sure "make" treats thse as the right type of variable
# when += is used later.
OBJS :=
DIRS :=

# Must come first: contains boot entry code
include arch/$(ARCH)/Makefile

include core/Makefile
include mem/Makefile
include io/Makefile
include lib/Makefile

# Must come last: contains kernel target
include arch/$(ARCH)/Makefile.final

clean: $(EXTRACLEAN)
	rm -rf $(foreach dir,$(DIRS),$(dir)*.o $(dir)*-server)
	rm -f kernel kernel.stripped

distclean: clean
	rm -f .depend .gdb_history include/arch

# Every .o file which has a corresponding .cdl file will
# depend on the server stubs.

SERVERS := $(foreach obj,$(OBJS),$(wildcard $(obj:.o=).cdl))
SERVERS := $(SERVERS:%.cdl=%) 

$(SERVERS:%=%-server): %-server: %.cdl $(TOP)/../ifaces
	rm -rf "$(BUILDDIR)/$@"
	$(IDLC) -t $(ARCH) -l c++ -r -i "$(TOP)/../ifaces" -o "$(BUILDDIR)/$@" "$<"

$(SERVERS:%=%.cc): %.cc: %-server

servers: symlinks $(SERVERS:%=%-server)

dep: servers
	rm -f .depend
	for i in $(OBJS:.o=); do \
		for j in cc S; do \
			if [ -e "$$i".$$j ]; then \
				FILE="$$i".$$j; \
			fi; \
		done; \
		\
		if [ "$$FILE" ]; then \
			$(CXX) $(CXXFLAGS) -M -MT "$$i".o "$$FILE" >> .depend; \
		fi \
	done; \
	for i in $(SERVERS); do \
		$(IDLC) -M -l c++ -r -i "$(TOP)/../ifaces" -o "$$i-server" "$$i.cdl" >> .depend; \
	done

ifeq (.depend,$(wildcard .depend))
include .depend
default: kernel kernel.stripped
else
rerun: dep
	@$(MAKE)

default: rerun
endif