arch = x64
INCLUDES = -I. -I$(src)/arch/$(arch) -I$(src) -I$(src)/external/libunwind/include
CXXFLAGS = -std=gnu++11 -lstdc++ $(CFLAGS) $(do-sys-includes) $(INCLUDES)
CFLAGS = $(autodepend) -g -Wall -Wno-pointer-arith $(INCLUDES) -Werror $(cflags-$(mode)) \
	-U_FORTIFY_SOURCE -fno-stack-protector -Wformat=0 \
	$(arch-cflags)
ASFLAGS = -g $(autodepend)

cflags-debug =
cflags-release = -O2

arch-cflags = -msse4.1


quiet = $(if $V, $1, @echo " $2"; $1)
very-quiet = $(if $V, $1, @$1)

makedir = $(call very-quiet, mkdir -p $(dir $@))
build-cxx = $(CXX) $(CXXFLAGS) -c -o $@ $<
q-build-cxx = $(call quiet, $(build-cxx), CXX $@)
build-c = $(CC) $(CFLAGS) -c -o $@ $<
q-build-c = $(call quiet, $(build-c), CC $@)
build-s = $(CXX) $(CXXFLAGS) $(ASFLAGS) -c -o $@ $<
q-build-s = $(call quiet, $(build-s), AS $@)
build-so = $(CC) $(CFLAGS) -o $@ $^
q-build-so = $(call quiet, $(build-so), CC $@)
	
%.o: %.cc
	$(makedir)
	$(q-build-cxx)

%.o: %.c
	$(makedir)
	$(q-build-c)

%.o: %.S
	$(makedir)
	$(q-build-s)

%.so: CFLAGS+=-fPIC -shared
%.so: %.o
	$(makedir)
	$(q-build-so)

sys-includes = $(jdkbase)/include $(jdkbase)/include/linux
autodepend = -MD -MT $@ -MP

do-sys-includes = $(foreach inc, $(sys-includes), -isystem $(inc))

tests := tests/tst-dir.so

tests/tst-dir.so: tests/tst-dir.o

all: loader.img loader.bin $(tests)

boot.bin: arch/x64/boot16.ld arch/x64/boot16.o
	$(call quiet, $(LD) -o $@ -T $^, LD $@)

loader.img: boot.bin loader.elf
	$(call quiet, dd if=boot.bin of=$@ > /dev/null 2>&1, DD $@ boot.bin)
	$(call quiet, dd if=loader.elf of=$@ conv=notrunc seek=128 > /dev/null 2>&1, \
		DD $@ loader.elf)

loader.bin: arch/x64/boot32.o arch/x64/loader32.ld
	$(call quiet, $(LD) -nostartfiles -static -nodefaultlibs -o $@ \
	                $(filter-out %.bin, $(^:%.ld=-T %.ld)), LD $@)

arch/x64/boot32.o: loader.elf

fs = fs/fs.o bootfs.o

fs +=	fs/vfs/main.o \
	fs/vfs/vfs_conf.o \
	fs/vfs/vfs_lookup.o \
	fs/vfs/vfs_mount.o \
	fs/vfs/vfs_vnode.o \
	fs/vfs/vfs_task.o \
	fs/vfs/vfs_syscalls.o

fs +=	fs/ramfs/ramfs_vfsops.o \
	fs/ramfs/ramfs_vnops.o

fs +=	fs/devfs/devfs_vnops.o \
	fs/devfs/device.o

drivers = drivers/vga.o drivers/console.o drivers/isa-serial.o
drivers += $(fs)
drivers += mmu.o
drivers += elf.o
drivers += drivers/device.o drivers/device-factory.o
drivers += drivers/driver.o drivers/driver-factory.o
drivers += drivers/virtio.o
drivers += drivers/clock.o drivers/kvmclock.o

drivers += drivers/char/console.o

objects = arch/x64/exceptions.o
objects += arch/x64/entry.o
objects += arch/x64/math.o
objects += arch/x64/apic.o
objects += arch/x64/arch-setup.o
objects += mutex.o
objects += debug.o
objects += drivers/pci.o
objects += mempool.o
objects += arch/x64/elf-dl.o
objects += linux.o
objects += sched.o

include $(src)/libc/build.mak
objects += $(addprefix libc/, $(libc))

libstdc++.a = $(shell $(CXX) -static -print-file-name=libstdc++.a)
libsupc++.a = $(shell $(CXX) -static -print-file-name=libsupc++.a)
libgcc_s.a = $(shell $(CXX) -static -print-libgcc-file-name)
libgcc_eh.a = $(shell $(CXX) -static -print-file-name=libgcc_eh.a)

loader.elf: arch/x64/boot.o arch/x64/loader.ld loader.o runtime.o $(drivers) \
        $(objects) dummy-shlib.so \
		bootfs.bin
	$(call quiet, $(LD) -o $@ \
		-Bdynamic --export-dynamic --eh-frame-hdr --enable-new-dtags \
	    $(filter-out %.bin, $(^:%.ld=-T %.ld)) \
	    $(libstdc++.a) $(libsupc++.a) $(libgcc_s.a) $(libgcc_eh.a) $(src)/libunwind.a, \
		LD $@)

dummy-shlib.so: dummy-shlib.o
	$(call quiet, $(CXX) -nodefaultlibs -shared -o $@ $^, LD $@)

jdkbase := $(shell find $(src)/external/openjdk.bin/usr/lib/jvm \
                         -maxdepth 1 -type d -name 'java*')

bootfs.bin: scripts/mkbootfs.py bootfs.manifest $(tests)
	$(call quiet, $(src)/scripts/mkbootfs.py -o $@ -d $@.d -m $(src)/bootfs.manifest \
		-D jdkbase=$(jdkbase), MKBOOTFS $@)

bootfs.o: bootfs.bin

runtime.o: ctype-data.h

ctype-data.h: gen-ctype-data
	$(call quiet, ./gen-ctype-data > $@, GEN $@)

gen-ctype-data: gen-ctype-data.o
	$(call quiet, $(CXX) -o $@ $^, LD $@)

-include $(shell find -name '*.d')