/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */#include <iostream>#include <bpf/libbpf.h>#include <bpf/bpf.h>#include <bpf/btf.h>#include "test_core_extern.skel.h" /* do nothing, just make sure we can link successfully */ static void dump_printf(void *ctx, const char *fmt, va_list args){} int main(int argc, char *argv[]){	struct btf_dump_opts opts = { };	struct test_core_extern *skel;	struct btf *btf; 	/* libbpf.h */	libbpf_set_print(NULL); 	/* bpf.h */	bpf_prog_get_fd_by_id(0); 	/* btf.h */	btf = btf__new(NULL, 0);	btf_dump__new(btf, dump_printf, nullptr, &opts); 	/* BPF skeleton */	skel = test_core_extern__open_and_load();	test_core_extern__destroy(skel); 	std::cout << "DONE!" << std::endl; 	return 0;}