bootloader/boot.asm:145: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
bootloader/boot.asm:147: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
bootloader/boot.asm:168: warning: label alone on a line without a colon might be in error [-w+orphan-labels]
Is this right? Or there should be colons?