code fixed and stiupid build

Makescript

@@ -0,0 +1,11 @@
+#!/usr/bin/env sh
+
+INCLUDE="-Isys/drv/vga/include -Isys/include"
+CFLAGS="-g -m32 -ffreestanding -Wall -Wextra -pedantic -nostdlib $INCLUDE"
+ASFLAGS="-felf32"
+LDFLAGS="-m elf_i386"
+
+cc $CFLAGS -c sys/drv/vga/video.c -o obj/vga.o
+cc $CFLAGS -c sys/sysinit.c -o obj/sysinit.o
+nasm $ASFLAGS boot/boot.s -o obj/boot.o
+ld $LDFLAGS -T boot/link.ld -o omos obj/boot.o obj/vga.o obj/sysinit.o 

boot/Makefile

@@ -0,0 +1,5 @@
+AS=nasm
+FLAGS=-felf32
+
+boot.o:
+	$(AS) $(FLAGS) boot.s -o boot.o

boot/boot.s

@@ -1,15 +1,12 @@
 ; only support mb1
-align	equ 1 << 0
-info	equ 1 << 1
-flags	equ align | info
-magic	equ 0x1BADB002
-chksum	equ - (magic + flags)
+
+bits 32
 
 section .multiboot
 	align	4
-			dd magic
-			dd flags
-			dd chksum
+		dd 0x1badb002 
+		dd 0x00
+		dd - (0x1badb002 + 0x00)
 
 global _start
 extern sysinit

link.ld

@@ -0,0 +1,9 @@
+OUTPUT_FORMAT(elf32-i386)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x100000;
+	.text : {*(.text)}
+	.data : {*(.data)}
+	.bss  : {*(.bss)}
+}

sys/Makefile

@@ -1,4 +1,5 @@
 include sys/drv/vga/Makefile
+
 CC=cc
 FLAGS=-Wall -c -g -Wextra -ffreestanding -m32 -nostdlib 
 SRCS=$(wildcard sys/*.c)

sys/drv/vga/include/video.h

@@ -8,6 +8,6 @@
 s8 *vga_vidmem = (s8 *)0xb8000;
 
 void vga_write(s8 *, s8);
-void vga_clearscreen();
+void vga_clearscreen(void);
 
 #endif

sys/drv/vga/video.c

@@ -15,7 +15,9 @@ vga_write(s8 *sequence, s8 flags)
 	}
 } 
 
-void vga_clearscreen() {
+void
+vga_clearscreen(void)
+{
     for (int i = 0; i <= SIZE; i++) {
         vga_vidmem[i] = 0;
     }

sys/sysinit.c

@@ -1,4 +1,6 @@
 void
-sysinit() {
-	write("Om Smart.", 0x0F, 10);
+sysinit(void)
+{
+	vga_clearscreen();
+	vga_write("Om Smart.", 0x0F);
 }