小编Red*_*ert的帖子

我在安装我见过的互联网上发布的Windows SDK时遇到了一个错误,但没有一个解决方案适合我.这是我得到的日志

9:43:37 AM Monday, October 14, 2013: SFX C:\Program Files\Microsoft SDKs\Windows\v7.1\Setup\SFX\vcredist_x64.exe installation started with log file C:\Users\clarkbd\AppData\Local\Temp\Microsoft Windows SDK for Windows 7_c3c42538-8a3e-439d-be39-aee3078ca098_SFX.log
9:43:43 AM Monday, October 14, 2013: C:\Program Files\Microsoft SDKs\Windows\v7.1\Setup\SFX\vcredist_x64.exe installation failed with return code 1603
9:43:53 AM Monday, October 14, 2013: [SDKSetup:Error] Config_Products_Install: Installation of Product Microsoft Windows SDK for Windows 7 (failed): Please refer to Samples\Setup\HTML\ConfigDetails.htm document for further information. Stack:    at SDKSetup.Product.ConfigureRelatedSfx()    at SDKSetup.Product.ConfigureNewProduct(ManualResetEvent CancelEvent)
9:43:53 AM Monday, October 14, 2013: [SDKSetup:Info] Config_Products_InstallNew: End installation …

当我使用g ++编译这个示例代码时,我收到此警告:

警告:解除引用类型惩罚指针将破坏严格别名规则 [-Wstrict-aliasing]

代码:

#include <iostream>

int main() 
{
   alignas(int) char data[sizeof(int)];
   int *myInt = new (data) int;
   *myInt = 34;

   std::cout << *reinterpret_cast<int*>(data);
}

在这种情况下,不是data别名int,因此将其强制转换为int不会违反严格的别名规则？或者我在这里遗漏了什么？

编辑:奇怪,当我这样定义时data:

alignas(int) char* data = new char[sizeof(int)];

编译器警告消失了.堆栈分配是否与严格别名产生差异？事实上它是一个char[]而不是一个char*意味着它实际上不能为任何类型别名吗？