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

.PHONY: all new run newrun stick clean tags mount umount

############ compiler ############

GIT_REVISION=$(shell git rev-parse HEAD)

QEMU=/home/miguel/git/EXT/qemu-3.0.0/i386-softmmu/qemu-system-i386
#QEMU=qemu-system-i386

#use our cross compiler
CC=i686-foolos-gcc
AS=i686-foolos-as

#sorry just this
CC=i686-elf-gcc
AS=i686-elf-as

#try arm
#CC=arm-none-eabi-gcc
#CC=arm-none-eabi-as

############ compiler flags ############

#https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html

CFLAGS=
#CFLAGS+=-fvar-tracking
CFLAGS+=-DGIT_REVISION=\"$(GIT_REVISION)\"
CFLAGS+=-DFOOLOS_KERNEL
CFLAGS+=-ffreestanding # do we need this if using own compiler?
CFLAGS+=-nostdlib
#CFLAGS+=-Og
CFLAGS+=-O0
CFLAGS+=-I.
CFLAGS+=-I/home/miguel/temp/foolos/usr/i686-foolos/include/
CFLAGS+=-I./asm
CFLAGS+=-I./kernel
CFLAGS+=-I./driver
CFLAGS+=-I./fs
CFLAGS+=-I./net
CFLAGS+=-I./video
CFLAGS+=-gstabs

#CFLAGS+=-fstack-protector-all
#CFLAGS+=-fno-zero-initialized-in-bss
#CFLAGS+=-fdata-sections -ffunction-sections

#CFLAGS+= -w # disable all warnings
#CFLAGS+= -Wimplicit-function-declaration
CFLAGS+= -Wall
#CFLAGS+= -Wextra 
#CFLAGS+= -pedantic
CFLAGS+= -Werror
CFLAGS+= -Werror=implicit-function-declaration

CFLAGS+= -Wno-unused-variable
CFLAGS+= -Wno-unused-function
CFLAGS+= -Wno-int-conversion
CFLAGS+= -Wno-implicit-int
CFLAGS+= -Wno-incompatible-pointer-types
CFLAGS+= -Wno-discarded-qualifiers
CFLAGS+= -Wno-unused-but-set-variable

#CFLAGS+ = -Wall -Wextra -std=c89 -pedantic -Wmissing-prototypes -Wstrict-prototypes -Wold-style-definition

######## linker flags ####################
LDFLAGS=
LDLIBS+=-lgcc

########## assembler flags #################
ASFLAGS=
ASFLAGS+=-gstabs

########## verbosity ##################3
V = 0
#CC = @echo "Compiling (i686-elf-gcc) $<..."; i686-elf-gcc
AS = @echo "Assembling (i686-elf-as) $<..."; i686-elf-as
#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 ./fs/*.c)
SOURCES+=$(wildcard ./driver/*.c)
SOURCES+=$(wildcard ./terminal/*.c)
SOURCES+=$(wildcard ./lib/*/*.c)
SOURCES+=$(wildcard ./testing/*.c)
SOURCES+=$(wildcard ./net/*.c)
SOURCES+=$(wildcard ./video/*.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))

ASM_MULTIBOOT2=$(wildcard ./asm/*.S)
ASM_MULTIBOOT_OBJ2=$(patsubst %.S, %.o, $(ASM_MULTIBOOT2))

ASM_OBJECTS+=$(ASM_MULTIBOOT_OBJ)
ASM_OBJECTS+=$(ASM_MULTIBOOT_OBJ2)


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

FOOLOS_ISO=fool-os-i386.iso
FOOLOS_ISO_EFI=fool-os-i386-efi.iso
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
SUBDIRS=userspace
IMG_FILLUP=fill.img
IMG_USERSPACE=./userspace/ext2.img

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

all: tags $(FOOLOS_ISO) #$(FOOLOS) # tags # $(FOOLOS_VDI)
new: clean all
newrun: clean run

run: qemu-run
debug: qemu-debug

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

include Makefile.common
-include $(DEPS)


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

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

.PHONY: $(SUBDIRS) $(CLEANDIRS)

$(SUBDIRS):
	@echo "-- Recursing make to [$@]..."; $(MAKE) --no-print-directory -C $@ 
	@echo "-- Returned from [$@]"

$(CLEANDIRS):
	@echo "-- Recursing clean to [$(@:clean-%=%)]..."; $(MAKE) --no-print-directory -C $(@:clean-%=%) clean
	@echo "-- Returned from [$(@:clean-%=%)]"

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

$(KERNEL_IMG): $(ASM_OBJECTS) $(OBJECTS) 
	@echo "linking kernel..."
	$(CC) $(CFLAGS) $(LDFLAGS) -T linker.ld -o $@ $^ $(LDLIBS)

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

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

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

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

# run in our local bochs (we need cirrus support for our vesa mode)
#run-bochs: all
#	~/opt/bochs-2.6.8/bin/bochs -q -f bochs/bochsrc  -rc bochs/bochsdebug 

# run in qemu
qemu-run: all
	#qemu-system-i386 -enable-kvm disk.img -smp 4 -s 
	#qemu-system-i386 -enable-kvm -s -kernel foolos.img -smp 4 -initrd userspace/ext2.img  
	echo XDOTOOL HACK...&& 	sleep 0.2 && xdotool search --name "QEMU" windowsize 100 100 && echo XDOTOOL HACK END. &
	$(QEMU) -enable-kvm $(FOOLOS_ISO) -smp 4 -serial stdio \
	-net nic,model=e1000 \
	-net tap,ifname=tap0,script=no,downscript=no \
	-vga virtio \
	-nographic \
	-vnc :0 \
	-m 1024
	#-net dump,file=./netfool 


qemu-debug: all
	echo XDOTOOL HACK...&& 	sleep 0.2 && xdotool search --name "QEMU" windowsize 100 100 && echo XDOTOOL HACK END. &
	$(QEMU) -enable-kvm $(FOOLOS_ISO) -smp 4 -serial stdio \
	-net nic,model=e1000 \
	-net tap,ifname=tap0,script=no,downscript=no \
	-vga virtio \
	-m 1024 -s -S
#	qemu -enable-kvm -s -S ~/temp/FoolOs/disk.img
#	qemu -enable-kvm -s -singlestep disk.img 
#	qemu-system-i386 -enable-kvm -s -S -kernel foolos.img -smp 4 -initrd userspace/ext2.img  
	#-net dump,file=./netfool \
monitor:
	echo XDOTOOL HACK...&& 	sleep 0.2 && xdotool search --name "QEMU" windowsize 100 100 && echo XDOTOOL HACK END. &
	qemu-system-i386 -s -S $(FOOLOS_ISO) -smp 4  -monitor stdio # -serial stdio #-enable-kvm -smp 1

qemu-kill:
	killall qemu-system-i386


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

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

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

clean: $(CLEANDIRS)
	@echo "Cleaning..."; rm -f *.bin $(FOOLOS) $(FOOLOS_ISO) $(FOOLOS_ISO_EFI) $(FOOLOS_VDI) $(KERNEL_ENTRY) $(KERNEL_IMG) $(ASM_OBJECTS) $(OBJECTS) $(IMG_FILLUP) $(BIN_MBR) $(BIN_MP) $(BIN_STAGE2) $(DEPS) bochs.out bochs.log ne2k-tx.log ne2k-txdump.txt  tags  grubiso/boot/foolos.bin grubiso/boot/ext2.img
	@echo "Cleaning Documentation..."; rm -f ./doc/ -r

tags:
	@echo "Generating ctags..."; ctags --recurse=yes .

############ mounting #############

#mount: disk.img
#	echo "* mounting disk image"
#	sudo losetup /dev/loop1 $< -o 1048576
#	sudo mount /dev/loop1 /mnt/vdi

#umount:
#	echo "* unmounting disk image"
#	sudo umount /mnt/vdi
#	sudo losetup -d /dev/loop1

##### ISO #####

$(FOOLOS_ISO): $(KERNEL_IMG) userspace
	@echo "------------------------"
	@echo "Create ISO..."
	@cp $(KERNEL_IMG) grubiso/boot/foolos.bin
	@cp $(IMG_USERSPACE) grubiso/boot
#	@grub-mkrescue -d /usr/lib/grub/x86_64-efi -o $(FOOLOS_ISO_EFI) grubiso/
	@grub-mkrescue -d /usr/lib/grub/i386-pc  -o $(FOOLOS_ISO) grubiso/
#	@grub-mkrescue -d /usr/lib/grub/i386-pc -d /usr/lib/grub/i386-efi -d /usr/lib/grub/x86_64-efi -o $(FOOLOS_ISO) grubiso/
	@echo "Finished ISO"
	@echo "------------------------"

#### README ###

gitweb_readme:
	markdown README.md | ssh git readme miguel/fool-os set

### DOC ###
doxygen: clean
	doxygen doxy.cfg

## headers ##
list_headers:
	find asm/ driver/ fs/ kernel/ lib/ -iname *.h -exec basename {} \;  |  sort | uniq -c

#tap interface#
create_tap:
	sudo tunctl -t tap0 -u miguel
	sudo ip link set tap0 up
	sudo route add -host 192.168.0.20 dev tap0

#qemu-system-i386 -netdev tap,id=mynet0,ifname=tap0,script=no,downscript=no -enable-kvm fool-os-i386.iso -smp 4 -serial stdio
#	tunctl -u <username>
#-net user,hostfwd=tcp::10022-:22\
#echo 1 > /proc/sys/net/ipv4/ip_forward
#echo 1 > /proc/sys/net/ipv4/conf/wlan0/proxy_arp
#echo 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp

#https://blog.elastocloud.org/2015/07/qemukvm-bridged-network-with-tap.html
create_bridged:
	sudo ip link add br0 type bridge
	sudo ip addr flush dev eth0
	sudo ip link set eth0 master br0
	sudo ip tuntap add dev tap0 mode tap user miguel
	sudo ip link set tap0 master br0
	sudo ip link set dev br0 up
	sudo ip link set dev tap0 up
	sudo dhclient