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bpf2go: enable ebpf code reuse across go packages #1509

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bpf2go: enable ebpf code reuse across go packages #1509

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Commits on Oct 29, 2024

  1. bpf2go: enable ebpf code reuse across go packages 

    Extract imports from "bpf2go.hfiles.go" in the output dir, scan packages
for header files, and expose headers to clang. C code consumes headers
by providing a go package path in include directive, e.g.

bpf2go.hfiles.go:
  package awesome
  import (
    _ "example.org/foo"
  )

frob.c:
  #include "example.org/foo/foo.h"

It is handy for sharing code between multiple ebpf blobs withing a
project. Even better, it enables sharing ebpf code between multiple
projects using go modules as delivery vehicle.

By listing build dependencies in a .go file, we ensure that they are
properly reflected in go.mod.

Signed-off-by: Nick Zavaritsky <mejedi@gmail.com>
    @mejedi
    mejedi committed Oct 29, 2024
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