btf__add_datasec_var_info
LIBBPF_API int btf__add_datasec_var_info(struct btf *btf, int var_type_id,
if (btf__add_datasec_var_info(btf, vi->type, vi->offset, vi->size))
btf__add_datasec_var_info(btf, 15, 0, 4);
btf__add_datasec_var_info(btf, 16, 4, 8);
err = btf__add_datasec_var_info(btf, 1, 4, 8);