stdafx.h和MySQL

Question

我的问题很简单，我得到了以下内容：

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

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

我收到了警告(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'

因此，我检查了stdafx包含this .h，其中定义了_WIN32_WINNT，my_global.h还包括_WIN32_WINNT，我能对此做些什么呢？

这正是my_global.h文件的冲突部分-- 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

对于那些包括问题在内的问题，我是有点新的，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

使用

/* 
  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真的很差。

Answer 2

在更好地理解了这个问题之后，my_global.h似乎将您的windows环境设置为与MySQL一起使用。由于这种情况，我将停止使用targetver.h。我假设您使用的是预编译头，因为这是生成stdafx.h的唯一一次。我建议在没有预编译头的情况下制作一个项目或者删除targetver.h。有关更多详细信息，请参阅here。