Kernel headers (3)

• The kernel-to-userspace ABI is backward compatible

• • Binaries generated with a toolchain using kernel headers older than the running kernel will work without problem, but won't be able to use the new system calls, data structures, etc.
  • Binaries generated with a toolchain using kernel headers newer than the running kernel might work on if they don't use the recent features, otherwise they will break
  • Using the latest kernel headers is not necessary, unless access to the new kernel features is needed

• The kernel headers are extracted from the kernel sources using the headers_install kernel Makefile target.