这个错误什么含义：dll 接口类成员可能不与dll 接口一起声明

Question

网上下了一个别人的程序，结果编译出错。有没有人碰到过这个错？ 谢谢

Answer 1

什么样的代码？什么编译环境？

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Answer 2

代码如下，“MESQUITE_EXPORT void clear(); “ 出错。在2008下编译。



class MESQUITE_EXPORT MsqError {
public:

    /* NOTE: If you add an error to this list, make sure
       a) you add it *before* LAST_ERROR_CODE
       b) you add the corresponding string in MsqError.cpp
     */
    /** \brief Error codes
     */
  enum ErrorCode {
    NO_ERROR          =  0,/**< no error */
    UNKNOWN_ERROR,         /**< unknown error occured */
    OUT_OF_MEMORY,         /**< unable to allocate the necessary memory */
    INVALID_ARG ,          /**< invalid function argument passed */
    NOT_INITIALIZED,       /**< object not initialized */
    INVALID_STATE,         /**< object is in an invalid state */
    FILE_ACCESS,           /**< File cannot be opened/created. */
    FILE_FORMAT,           /**< Wrong file type */
    PARSE_ERROR,           /**< Error parsing input (or input file) */
    IO_ERROR,              /**< An I/O error occured (e.g. read from file failed.) */
    INVALID_MESH,          /**< The mesh is invalid */
    NO_PD_STORAGE_MODE,    /**< no storage mode chosen within PatchData */
    NOT_IMPLEMENTED,       /**< requested functionality is not (yet) implemented */
    INTERNAL_ERROR,        /**< A bug in Mesquite */
    INTERRUPTED,           /**< Application or user interrupted operation */
    TAG_ALREADY_EXISTS,    /**< Attempt to create tag that already exists */
    TAG_NOT_FOUND,         /**< Specified tag does not exist */
    UNSUPPORTED_ELEMENT,   /**< the element type is not supported. */
    LAST_ERROR_CODE
  };
 
  //! \brief resets error object to non-active state (no error).
  MESQUITE_EXPORT void clear();
 
  //! \brief Check if an error has occured
  inline bool error() const       { return NO_ERROR != errorCode; }
  //! \brief Check if an error has occured
  inline operator bool() const    { return NO_ERROR != errorCode; }

  //! \brief Initialize to cleared state.
  MsqError() : errorCode(NO_ERROR) { }
 
  //! Destructor - empty but must declar virtual destrucor if virtual functions.
  virtual ~MsqError();

 /* ************************************************************ *
  *            Low-level access to error data
  * ************************************************************ */ 

  //! Get error code
  inline ErrorCode error_code() const    { return errorCode; }

  //!\class Trace
  //!\brief One line of stack trace data
  struct MESQUITE_EXPORT Trace {
    std::string function;
    std::string file;
    int line;
   
    Trace( const char* fun, const char* fil, int lin )
     : function(fun), file(fil), line(lin) {}
  };
 
  //! Get error message
  const char* error_message() const;
 
  //! Container type used to store stack trace.
  //! Return type for stack()
  typedef std::list<Trace> StackTrace;

  //! Get stack trace
  inline const StackTrace& stack() const { return stackTrace; }

 /* ************************************************************ *
  *                        Set error data
  * ************************************************************ */ 
 
  //! Add to back-trace of call stack.  Called by MSQ_CHKERR.
  //! Must always return true.
  virtual bool push( const char* function, const char* file, int line );
 
  //! Initialize the error object with the passed data.
  virtual bool set_error( ErrorCode num, const char* msg = 0 );
 
  //!\class setter
  //! Used for implementing pre-processor macros for internal use
  //! in Mesquite.
  class MESQUITE_EXPORT Setter {
    public:
      Setter(MsqError& err, const char* function, const char* file, int line)
        : mErr(err), functionName(function), fileName(file), lineNumber(line) {}
     
      bool set( ErrorCode num );
      bool set( const char* message, ErrorCode num );
      bool set( const std::string& message, ErrorCode num );
      bool set( ErrorCode num, const char* format, ... )
      #ifdef __GNUC__
        __attribute__ ((format (printf, 3, 4)))
      #endif
        ; // ending semicolon for set( ErrorCode num, const char* format, ... )
    private:
      MsqError& mErr;
      const char* functionName;
      const char* fileName;
      int lineNumber;
  };

  static inline Setter setter( MsqError& err, const char* function, const char* file, int line )
  { return Setter( err, function, file, line ); }

private:

  ErrorCode errorCode;
  std::string errorMessage;
  StackTrace stackTrace;
};