#! /bin/sh

##  Kernel-mode libcaca compilation script -- Sam Hocevar <sam@zoy.org>
##  $Id$

set -x
set -e

CFLAGS="-fno-builtin -O0 -I. -I.. -I../caca/ -Wall -D__KERNEL__ -fno-stack-protector -m32"
LDFLAGS="-nostdlib -Wl,-N -Wl,-Ttext -Wl,100000"

./configure --disable-slang --disable-ncurses --disable-win32 \
	            --disable-conio --disable-x11 --disable-gl --disable-network \
	            --enable-vga --disable-imlib2 --disable-doc \
	            --host i386

# Compile cacademo, leave it as an object
cd caca && make && cd ..
cd examples && make dithering.o && cd ..


cd kernel

# Bootsector
nasm -f bin -o bootsect.bin boot/bootsect.asm
# Interruption handlers
nasm -f elf -o int.o boot/int.asm 

##### Boot (x86)
# Stage2, loads GDT, PIC, IDT, interrupts, then calls kmain()
gcc $CFLAGS boot/stage2.c -c
# GDT installation, called by stage2
gcc $CFLAGS boot/gdt.c -c
# PIC installation, called by stage2
gcc $CFLAGS boot/pic.c -c
# IDT installation, called by stage2
gcc $CFLAGS boot/idt.c -c
# Interruptions installation, called by stage2
gcc $CFLAGS boot/interruptions.c -c

##### Drivers 
# Floppy driver
gcc $CFLAGS drivers/floppy.c -c
# Processor driver
gcc $CFLAGS drivers/processor.c -c
# Keyboard handler
gcc $CFLAGS drivers/keyboard.c -c
# Memory driver
gcc $CFLAGS drivers/memory.c -c
# Programmable Interval Timer driver
gcc $CFLAGS drivers/timer.c -c

# Minimalistic libc
gcc $CFLAGS klibc.c -c

# Kernel by itself, contains cmain() which calls main()
gcc $CFLAGS kernel.c -c

# Link everything but bootsector, kernel.o MUST be at the very end
ld --oformat binary -Ttext 1000 stage2.o gdt.o pic.o int.o idt.o interruptions.o keyboard.o memory.o timer.o floppy.o processor.o klibc.o kernel.o -Map kernel.map ../caca/.libs/libcaca.a   -o kern.bin 
   
ls -ail kern.bin
cd ..

# Copy bootsector at the very beginning of the floppy (first sector/512 bytes of the image), then kernel right after
cat kernel/bootsect.bin  kernel/kern.bin /dev/zero | dd of=cacademo.img bs=512 count=2500