TcFilter Improved compiler directives to correctly compile the Kernel target

elastic / ebpf

Elastic's eBPF

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Closed fntlnz closed 3 years ago

fntlnz commented 3 years ago

Included the KERNEL and __BPF_TRACING__ definitions used by libbpf and Kerneldefs.h
Added compilation directives to do better llvm passes while undiwning tables and to produce only meaningful errors

This is a follow up to my previous PR #21 that had some issues compiling in certain environments, like

 error: ‘__aligned_u64’ does not name a type
   __aligned_u64 key;
   ^~~~~~~~~~~~~

fntlnz commented 3 years ago

Thanks for the review @nicholasberlin @stanek-michal @nfritts !