#####################
    #			#
    # FoolOS Build Sys.	#
    #			#
    #####################



# main phony targets

.PHONY: all new run newrun stick clean

############ some constants ############

FOOLOS=FoolOS.img
FOOLOS_VDI=FoolOS.vdi

#submodules
SUBDIRS=boot1 boot2 font userspace

#take care to set this properly!
USB_STICK=/dev/sdf	

#use our cross compiler
CC=i686-elf-gcc

############ compiler flags ############
CFLAGS=
## CFLAGS+=-fstack-protector-all
## CFLAGS+=-Werror-implicit-function-declaration
## CFLAGS+=-w
CFLAGS+=-ffreestanding 
CFLATS+=-Wall
CFLAGS+=-Wextra
#CFLAGS+=-O3
#CFLAGS+=-O0
#CFLAGS+=-nostdlib 
CFLAGS+=-std=gnu11
CFLAGS+=-I.
CFLAGS+=-I/home/miguel/temp/fool-os-stuff/newlib-2.1.0/newlib/libc/include 
CFLAGS+=-gstabs
#CFLAGS+=-lgcc 
#CFLAGS+=-fno-zero-initialized-in-bss
#CFLAGS+= -O4
#CFLAGS+=-fdata-sections -ffunction-sections
#CFLAGS+= -Werror

LDFLAGS=
LDFLAGS+=-nostdlib
LDFLAGS+=-lgcc

#verbosity
#V = 0
#CC = @echo "Compiling $<..."; i686-foolos-gcc
#CC_1 = $(CCC)
#CC = $(CC_$(V))

############ source and object files and their deps ############

#kernel sources (asm and c)
SOURCES=
SOURCES+=$(wildcard ./kernel/*.c)
SOURCES+=$(wildcard ./video/*.c)
SOURCES+=$(wildcard ./lib/*/*.c)
SOURCES+=$(wildcard ./fs/*.c)

#derive kernel object files
OBJECTS=$(patsubst %.c, %.o, $(SOURCES))

#derive deps
DEPS=$(patsubst %.c, %.d, $(SOURCES))



####### ASM STUFF #####

ASM_SOURCES=$(wildcard ./asm/*.asm)
ASM_OBJECTS=$(patsubst %.asm, %.o, $(ASM_SOURCES))
ASM_MULTIBOOT=$(wildcard ./asm/*.s)
ASM_MULTIBOOT_OBJ=$(patsubst %.s, %.o, $(ASM_MULTIBOOT))


############ Final Targets ############

all: $(FOOLOS) #$(FOOLOS_VDI)
new: clean all
run: run-qemu
newrun: clean run


########### INCLUDES ###################

include Makefile.common
-include $(DEPS)


#### BINARIES AND SUBMODULES ########

KERNEL_IMG=foolos.img
BIN_KERNEL=kernel.bin
BIN_MBR=./boot1/mbr.bin
BIN_STAGE2=./boot2/stage2.bin
BIN_MP=./boot2/mp.bin
BIN_FOOLFONT=./font/binfont.bin

IMG_FILLUP=fill.img
IMG_USERSPACE=./userspace/ext2.img


######### RECURSIVE MAKES ########################


CLEANDIRS=$(SUBDIRS:%=clean-%)

.PHONY: $(SUBDIRS) $(CLEANDIRS)

$(SUBDIRS):
	$(MAKE) -C $@

$(CLEANDIRS):
	$(MAKE) -C $(@:clean-%=%) clean



############ linking kernel binary ############

$(KERNEL_IMG): $(ASM_MULTIBOOT_OBJ) $(ASM_OBJECTS) $(OBJECTS) 
	$(CC) $(CFLAGS) $(LDFLAGS) -T linker.ld -o $@ $^ 


############ assembling of final image ############

# master boot record, kernel binary and fool-font 
$(FOOLOS): $(KERNEL_IMG) # $(SUBDIRS)
	sudo cp $(KERNEL_IMG) /mnt/vdi/boot
	sync

#	dd if=$(BIN_MBR) of=$@ bs=512 seek=0 conv=notrunc
#	dd if=$(BIN_STAGE2) of=$@ bs=512 seek=1 conv=notrunc
#	# kernel will start at 0x100000 in ram (this is what the booloader starts loading secotr: 10)
#	dd if=$(BIN_KERNEL) of=$@ bs=512 seek=10 conv=notrunc # kernel can be about 128KB (incl bss)
#	# the data will starts at 0x120000 in ram
#	dd if=$(IMG_USERSPACE) of=$@ bs=512 seek=266 conv=notrunc


############ virtual machines stuff ############

# vdi image for VirtualBox
$(FOOLOS_VDI): $(FOOLOS)
	-rm FoolOS.vdi
	VBoxManage convertfromraw $< $@  --uuid 2f11ca11-c35d-4240-b77e-79e37d32616c 

# run in our local bochs (we need cirrus support for our vesa mode)
run-bochs: all
	~/opt/bochs-2.6.6/bochs -q -f bochs/bochsrc -rc bochs/bochsdebug 

# run in qemu
run-qemu: all
	qemu-system-i386 $(FOOLOS)

run-qemu-debug: all
	qemu-system-i386 -s -S ~/temp/FoolOs/disk.img


############ create bootable usb image ############

stick:  $(FOOLOS)
	cat $< > $(USB_STICK) && sync
	xxd $(USB_STICK)  | head -n 50

############ cleanup ############

clean: $(CLEANDIRS)
	-rm *.bin $(FOOLOS) $(FOOLOS_VDI) $(KERNEL_ENTRY) $(ASM_MULTIBOOT_OBJ) $(KERNEL_IMG) $(ASM_OBJECTS) $(OBJECTS) $(IMG_FILLUP) $(BIN_MBR) $(BIN_MP) $(BIN_STAGE2) $(DEPS) bochs.out bochs.log ne2k-tx.log ne2k-txdump.txt