-KERNEL_OBJ = kernel.o entry.o
-
-include drivers/Makefile
include arch/x86/Makefile
+include drivers/Makefile
+include kernel/Makefile
ASFLAGS_BASE = -f elf -g dwarf2
-CFLAGS_BASE = -fgnu89-inline -ffreestanding -nostdlib -Iinclude -Iinclude/arch/x86 -g -DGIT_COMMIT=\"$(GIT_REV)\"
-LDFLAGS_BASE = -ffreestanding -nostdlib -lgcc -g
+CFLAGS_BASE = -fgnu89-inline -ffreestanding -nostdlib -Iinclude \
+ -Iinclude/arch/x86 -g -DGIT_COMMIT=\"$(GIT_REV)\" \
+ -O2 -flto
+LDFLAGS_BASE = -ffreestanding -nostdlib -lgcc -g -O2 -flto -T arch/x86/linker.ld
kernel.elf kernel.dbg: $(KERNEL_OBJ)
- $(CC) $(LDFLAGS_BASE) $(LDFLAGS) -T linker.ld $^ -o $@
- i686-elf-objcopy --only-keep-debug kernel.elf kernel.dbg
- i686-elf-objcopy --add-gnu-debuglink=kernel.dbg kernel.elf
- i686-elf-strip --strip-unneeded kernel.elf
+ $(REAL_CC) $(LDFLAGS_BASE) $(LDFLAGS) $^ -o $@
+ $(CROSS_COMPILE)objcopy --only-keep-debug kernel.elf kernel.dbg
+ $(CROSS_COMPILE)objcopy --add-gnu-debuglink=kernel.dbg kernel.elf
+ $(CROSS_COMPILE)strip --strip-unneeded kernel.elf
clean:
-rm $(KERNEL_OBJ) kernel.elf kernel.dbg
# Implicit rules
%.o: %.c
- $(CC) $(CFLAGS_BASE) $(CFLAGS) -c $< -o $@
+ $(REAL_CC) $(CFLAGS_BASE) $(CFLAGS) -c $< -o $@
%.o: %.s
$(AS) $(ASFLAGS_BASE) $(ASFLAGS) $< -o $@