Why does Visual Studio 2013 error on C4996?

问题:

In previous versions of Visual Studio using functions like _sleep or strncpy just outputs a warning. In the latest version, it's suddenly an error:

error C4996: '_sleep': This function or variable has been superseded by newer library or operating system functionality. Consider using Sleep instead. See online help for details.

I know I can disable it by adding #pragma warning(disable: 4996) in the beginning of the code, but it's extremely annoying that VS is trying to force me to use other functions. Is there any way to disable this behavior?

Before you ask, "Treat Warnings As Errors" is disabled, and it errors even if I turn off all warnings!

回答1:

Apparently new projects enable "SDK check" by default now, which treats these warnings as errors. To disable it, go to project properties -> Configuration Properties -> C/C++ -> General -> SDL checks -> No.

回答2:

enter at the beginning of the program:

#pragma warning(disable : 4996)

and that's it.

回答3:

You can also disable specific warning numbers in C/C++ > Advanced > Disable Specific Warnings.

回答4:

Project ->project_name properties -> Configuration Properties -> C/C++ -> Preprocessor -> Preprocessor Definitions -> Edit... add line _CRT_SECURE_NO_WARNINGS

回答5:

Compiling all sources I have referred:

Remove secure warnings (_CRT_SECURE_NO_WARNINGS) from projects by default in Visual Studio

kmcnamee's answer on How to use use _CRT_SECURE_NO_WARNINGS

Video that solved my problem. https://www.youtube.com/watch?v=qWxGZLjwKL0

Apparently, Security Development Lifecycle (SDL) recommended checks which include enabling additional secure code generation features and extra security-relevant warnings as errors.

The steps to solve this issue are:

1. Go to Project-> "your project name" Properties
2. Under Configuration Properties, go to C/C++
3. Under C/C++, go to Preprocessor 
4. Select Preprocessor Definitions and click on Edit from the dropdown menu
5. In the blank space fill out _CRT_SECURE_NO_WARNINGS