libbpf: Add btf__new_empty() to create an empty BTF object

	free(btf);

}

struct btf *btf__new_empty(void)

{

	struct btf *btf;

	btf = calloc(1, sizeof(*btf));

	if (!btf)

		return ERR_PTR(-ENOMEM);

	btf->fd = -1;

	btf->ptr_sz = sizeof(void *);

	/* +1 for empty string at offset 0 */

	btf->raw_size = sizeof(struct btf_header) + 1;

	btf->raw_data = calloc(1, btf->raw_size);

	if (!btf->raw_data) {

		free(btf);

		return ERR_PTR(-ENOMEM);

	}

	btf->hdr = btf->raw_data;

	btf->hdr->hdr_len = sizeof(struct btf_header);

	btf->hdr->magic = BTF_MAGIC;

	btf->hdr->version = BTF_VERSION;

	btf->types_data = btf->raw_data + btf->hdr->hdr_len;

	btf->strs_data = btf->raw_data + btf->hdr->hdr_len;

	btf->hdr->str_len = 1; /* empty string at offset 0 */

	return btf;

}

struct btf *btf__new(const void *data, __u32 size)

{

	struct btf *btf;

LIBBPF_API void btf__free(struct btf *btf);

LIBBPF_API struct btf *btf__new(const void *data, __u32 size);

LIBBPF_API struct btf *btf__new_empty(void);

LIBBPF_API struct btf *btf__parse(const char *path, struct btf_ext **btf_ext);

LIBBPF_API struct btf *btf__parse_elf(const char *path, struct btf_ext **btf_ext);

LIBBPF_API struct btf *btf__parse_raw(const char *path);

		bpf_program__section_name;

		btf__add_str;

		btf__find_str;

		btf__new_empty;

		perf_buffer__buffer_cnt;

		perf_buffer__buffer_fd;

		perf_buffer__epoll_fd;