Fixing bugs...

kernel/cpu/Makefile

@@ -1,8 +1,14 @@
-OBJS = multiboot.asm.o kernel_loader.asm.o ports.asm.o gdt.asm.o idt.asm.o interrupts.asm.o
+OBJS = multiboot.asm.o kernel_loader.asm.o ports.asm.o  \
+		gdt.asm.o idt.asm.o interrupts.asm.o assert.o
 
 ASM = nasm
 ASMFLAGS = -f elf
+CC = i686-elf-gcc # cross-compiler
+CFLAGS = -m32 -fno-stack-protector -ffreestanding -Wall -Wextra -Werror -g -c
 
 all: $(OBJS)
 %.asm.o: %.asm
-	$(ASM) $(ASMFLAGS) $< -o $@
+	$(ASM) $(ASMFLAGS) $< -o $@
+
+%.o: %.c
+	$(CC) $(CFLAGS) $< -o $@