bpf: remove -mkernel option and BPF_KERNEL_VERSION_CODE

Having the ability of specifying a target kernel version when building
a BPF program is one of these things that sound pretty good in theory,
but simply don't work in practice: kernels in practice contain
backports, etc.  Also, the addition of CO-RE to BPF has made this
uneccessary.

This patch removes the -mkernel command line option and also the
associated BPF_KERNEL_VERSION_CODE pre-processor constant.

Tested in bpf-unknown-none.

gcc/ChangeLog

	* config/bpf/bpf-opts.h (enum bpf_kernel_version): Remove enum.
	* config/bpf/bpf.opt (mkernel): Remove option.
	* config/bpf/bpf.cc (bpf_target_macros): Do not define
	BPF_KERNEL_VERSION_CODE.

0 files changed, 0 insertions, 0 deletions