up-to-date: kernel 3.2.54. (Always read current kernel sources!) This topic has maintainer rfree
SameKernel is idea to make kernel reproducible (deterministic, verifiable build). So that each time you build given kernel version (with same configuration), using same tools you will get binary identical resulting files.
Please see that page for details and please help our research: group Mempo is looking (2014-01) for hackers to help on this.
compiler and/or linker might add --build-id - it is fixed by adding changing --build-id to --build-id=none in the main Makefile as done by Mempo SameKernel script. See [vmlinux/asm-notes]
Again, to see one way how this problems can be resolved see this sub-project: https://wiki.debian.org/SameKernel
Name "SameKernel" is used by Mempo because the alternatives are harder to spell/remember.