Linux 2.6 Kernel Compilation

Linux Kernel Compilation

1. arch/x86/boot/boot.h:112 'Error: bad register name '%dil'

• This error occurs when trying to compile a version of kernel lower than what is running.
  
• This error can be fixed by replacing "=r" with "=q" in the affected line. "dil" (lower 8 bits part of [RE]DI) register is inexistent under x86-32, only available under x86-64.
• Check out this link: diff for boot.h

1. Undefined reference to __umoddi3
   
2. Undefined reference to __moddi3

• Error due to gcc version 4.3