Question

我的问题非常简单，我得到以下内容：

#include "stdafx.h"
#include "my_global.h"
#include "mysql.h"
#include "ServerManager.h"
#include "GamePlay.h"

#pragma comment(lib, "libmysql.lib")

我得到了警告（这很烦人）：

1>c:\program files\mysql\connector c 6.0.2\include\config-win.h(24): warning C4005: '_WIN32_WINNT' : macro redefinition
1>          c:\program files\windows kits\8.0\include\shared\sdkddkver.h(195) : see previous definition of '_WIN32_WINNT'

所以我检查stdafx包含targetver.h，其中定义了 _WIN32_WINNT ，my_global.h还包含 _WIN32_WINNT ，我该怎么办？

这正是my_global.h文件的冲突部分，它是MySQL C库的一部分：

/* Copyright 2000-2008 MySQL AB, 2008 Sun Microsystems, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/* Defines for Win32 to make it compatible for MySQL */

#define BIG_TABLES

/* 
  Minimal version of Windows we should be able to run on.
  Currently Windows 2000
*/
#define _WIN32_WINNT     0x0500

对于那些包含问题的人，我有点新意，谢谢！

Answer 1

我建议对my_global.h进行以下修改，替换

/* 
  Minimal version of Windows we should be able to run on.
  Currently Windows 2000
*/
#define _WIN32_WINNT     0x0500

与

/* 
  Minimal version of Windows we should be able to run on.
  Currently Windows 2000
*/
#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500
#error "MySQL requires Windows 2000 or later"
#elif !defined(_WIN32_WINNT)
#define _WIN32_WINNT     0x0500
#endif

也许我错过了一些东西，但我认为MySQL的确很差。

Answer 2

在更好地理解问题之后，似乎my_global.h设置了与MySQL一起使用的Windows环境。由于这种情况，我将停止使用targetver.h。我假设您正在使用预编译头，因为这是唯一生成stdafx.h的时间。我建议制作一个没有预编译标题的项目或删除targetver.h。有关详细信息，请参阅here。

stdafx.h和MySQL

2 个答案: