c - header 包含问题

稍加修改后，我在编译Tor时遇到问题。

在名为control.c的文件中，我添加了代码，该代码引用名为rend_service_t的结构（位于rendservice.h中）。我将rendservice.h包含在control.c的顶部，因为以前没有包含它。

如果尝试使用随附的Makefile，则会出现此错误：

control.c:2841: error: 'rend_service_t' undeclared (first use in this function)

我猜想rendservice.c没有被包含或没有被首先编译，所以我检查目录，并且没有用于rendservice的目标文件。我对此感到有些困惑，因为它显然已包含在内。
是什么导致这种情况发生？

我还尝试编辑Makefile.am/.in，以使rendservice.c/h在control.c/h之前，但这没有任何区别。

在control.c中：

...
#include "rendservice.h"
...
static int
handle_control_addservice(control_connection_t *conn, uint32_t len,
                             const char *body)
{
  smartlist_t *args;
  rend_service_t *service;
...

在rendservice.c中：

...
/** Represents a single hidden service running at this OP. */
typedef struct rend_service_t {
  /* Fields specified in config file */
  char *directory; /**< where in the filesystem it stores it */
  smartlist_t *ports; /**< List of rend_service_port_config_t */
  rend_auth_type_t auth_type; /**< Client authorization type or 0 if no client
                               * authorization is performed. */
  smartlist_t *clients; /**< List of rend_authorized_client_t's of
                         * clients that may access our service. Can be NULL
                         * if no client authorization is performed. */
  /* Other fields */
  crypto_pk_env_t *private_key; /**< Permanent hidden-service key. */
  char service_id[REND_SERVICE_ID_LEN_BASE32+1]; /**< Onion address without
                                                  * '.onion' */
  char pk_digest[DIGEST_LEN]; /**< Hash of permanent hidden-service key. */
  smartlist_t *intro_nodes; /**< List of rend_intro_point_t's we have,
                             * or are trying to establish. */
  time_t intro_period_started; /**< Start of the current period to build
                                * introduction points. */
  int n_intro_circuits_launched; /**< Count of intro circuits we have
                                  * established in this period. */
  rend_service_descriptor_t *desc; /**< Current hidden service descriptor. */
  time_t desc_is_dirty; /**< Time at which changes to the hidden service
                         * descriptor content occurred, or 0 if it's
                         * up-to-date. */
  time_t next_upload_time; /**< Scheduled next hidden service descriptor
                            * upload time. */
  /** Map from digests of Diffie-Hellman values INTRODUCE2 to time_t of when
   * they were received; used to prevent replays. */
  digestmap_t *accepted_intros;
  /** Time at which we last removed expired values from accepted_intros. */
  time_t last_cleaned_accepted_intros;
} rend_service_t;
...

最佳答案

rend_service_t是rendservice.c专用的结构-似乎不打算在该.c文件之外使用，并且未在rendservice.h中声明。 （请参阅我在此处查看的rendservice.c版本：https://doxygen.torproject.org/rendservice_8c_source.html）。

因此，这不是标题包含问题-根本没有在标题中添加结构。

您应该问一个问题，您打算将struct rend_service_t用于什么。

关于c - header 包含问题，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/11533413/