Deprecated commands in Visual C++

问题:

When building a solution in Visual Studio 2013 of a project, I noticed that I am getting warnings for the following references:

warning C4996: 'gethostbyname': Use getaddrinfo() or GetAddrInfoW() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warnings src\core\JCSocket.cpp 77 1
warning C4996: 'inet_addr': Use inet_pton() or InetPton() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warnings src\core\JCSocket.cpp 82 1
warning C4996: 'inet_addr': Use inet_pton() or InetPton() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warnings src\core\JCSocket.cpp 121 1
warning C4996: 'inet_ntoa': Use inet_ntop() or InetNtop() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warnings src\core\MuninNodeServer.cpp 64 1
warning C4996: 'GetVersionExW': was declared deprecated src\plugins\disk\DiskTimeMuninNodePlugin.cpp 48 1
warning C4996: 'GetVersion': was declared deprecated src\plugins\external\ConsolePipe.cpp 12 1
warning C4996: 'GetVersionExW': was declared deprecated src\plugins\PerfCounterMuninNodePlugin.cpp 56 1
warning C4996: 'GetVersionExW': was declared deprecated src\plugins\uptime\UptimeMuninNodePlugin.cpp 34 1

Whenever I try to change it to the recommended IntelliSense command, it is saying:

IntelliSense: identifier "inet_ntop" is undefined \src\core\MuninNodeServer.cpp 64 31

回答1:

These errors are telling you what to do. Microsoft is nice like that.

gethostbyname -> getaddrinfo
inet_addr -> inet_pton
inet_ntoa -> inet_ntop

As far as GetVersionExW and GetVersion Microsoft recommends using the appropriate Version Helper Function.

回答2:

Visual Studio tells you this warning cause you trying to use unsecure function which means includes the body of the function

and the body can obviously contain a signed overflow and there's a prospect to get another compiling errors or perhaps its not supported in the newer library

by the way, its about how you use this function

---

Simply you can disable the warning by add the following line

#pragma warning( disable : 4996)

at the top of your code

Which disable warning error code 4996 and will work fine without any problems.

Another way:

1. from the Solution Explorer right click on the project and choose Properties
2. navigate to Configuration Properties >> C/C++ >> Advanced
3. at the end just put 4996 in disable specific warning and click Apply >> Ok

Note: I prefer code way at all, It's more good to learn if you're not programming in visual studio or making a header file for your library