我有一个VS2015 C++
项目。应用程序必须在Windows 7和XP上运行。所以,我想设置_WIN32_WINNT
& WINVER
至_WIN32_WINNT_WINXP
。
这就是我项目stdafx.h
的样子:
stdafx.h中
#pragma once
#include "targetver.h"
#define _WIN32_WINNT _WIN32_WINNT_WINXP
#define WINVER _WIN32_WINNT_WINXP
#include <WinSDKVer.h>
// Windows Header Files:
#include <windows.h>
编译时,我看到以下警告/错误:
stdafx.h(12): error C2220: warning treated as error - no 'object' file generated
1>stdafx.h(12): warning C4005: '_WIN32_WINNT': macro redefinition
1> C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\include\SDKDDKVer.h(197): note: see previous definition of '_WIN32_WINNT'
1>stdafx.h(13): warning C4005: 'WINVER': macro redefinition
1> C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\include\SDKDDKVer.h(212): note: see previous definition of 'WINVER'
答案 0 :(得分:4)
因为#include "targetver.h"
包含<sdkddkver.h>
已经定义了常量_WIN32_WINNT和WINVER(当它们尚未由构建环境定义时)。
事实上,自动生成的targetver.h
会告诉您如何解决此问题:
#pragma once
// Including SDKDDKVer.h defines the highest available Windows platform.
// If you wish to build your application for a previous Windows platform, include WinSDKVer.h and
// set the _WIN32_WINNT macro to the platform you wish to support before including SDKDDKVer.h.
#include <SDKDDKVer.h>
简单的解决方案。只需在包含targetver.h
之前定义这些常量。您可能必须使用XP的实际文字值,因为您没有包含定义
像这样:
// x501 is XP
#define _WIN32_WINNT 0x0501
#define WINVER 0x0501
#include "targetver.h"
#include <windows.h>