Re: localtime deprecated?

James Kanze <>
3 Jun 2006 20:41:03 -0400
Martin Bonner wrote: wrote:

while compiling an existing project in the new MSVC 2005
compiler, I received the warning that:

: warning C4996: 'localtime' was declared deprecated
         C:\Program Files\Microsoft Visual Studio
8\VC\include\time.inl(114) : see declaration of 'localtime'
         Message: 'This function or variable may be unsafe. Consider
using localtime_s instead. To disable deprecation, use
_CRT_SECURE_NO_DEPRECATE. See online help for details.'

I wasn't aware that localtime was declared deprecated. Is
this true?

Yes. You can see the declaration in the error message. The
question you haven't asked is WHO declared it deprecated. The
answer is Microsoft (because if used carelessly, localtime can
overflow a buffer).

Can it? I don't think so. On the other hand, there is no way
to use it at all in a multithreaded environment. Which raises
an interesting question: if C++ adopts threading as part of the
language, do we also adopt this TR? Or?

James Kanze
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