Am just trying out the latest 2.6.20.6 kernel on Debian Sarge, and the first problem I hit was having the 'make bzImage' fail very early on with an error similar to:
cc1: error: invalid option `tune=i686'
make[1]: *** [arch/i386/kernel/asm-offsets.s] Error 1
make: *** [prepare0] Error 2
It turns out you need to use gcc 3.4 or higher if you choose Core Duo as the processor type. There are gcc-3.4 debs in the normal repositories for Debian Sarge.
