linker
LIBBPF_API int bpf_linker__add_file(struct bpf_linker *linker,
LIBBPF_API int bpf_linker__add_fd(struct bpf_linker *linker, int fd,
LIBBPF_API int bpf_linker__add_buf(struct bpf_linker *linker, void *buf, size_t buf_sz,
LIBBPF_API int bpf_linker__finalize(struct bpf_linker *linker);
LIBBPF_API void bpf_linker__free(struct bpf_linker *linker);