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Asked: 2026-05-30T15:03:37+00:00

I’m a noob with C++, but I need to resolve this problem ASAP. I’m

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I’m a noob with C++, but I need to resolve this problem ASAP.
I’m trying to run some C++ examples in Eclipse with Cygwin toolchain. These examples use functions like wcsncpy_s (in string.h or wchar.h).
The problem is that I can only use MS Visual Studio to compile these examples: wcsncpy_s is marked as “undeclared” even if string.h or wchar.h are included.

Is there a way to use cygwin with Eclipse and also use resources (libraries I believe) from Microsoft (like those mentioned above)? Maybe I just need to update Cygwin? Or is there no solution for this ?
Please advice 🙂

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1 Answer

  1. Editorial Team

    wcsncpy_s is not a standard C or C++ library function (note: I think they may have added similar function in C11, but I’m not sure). It is a function Microsoft added to their standard libraries in Visual Studio.

    It’s not a bad function, for what it does. But it’s non-standard. And they don’t use the usual leading underscore to indicate that it’s non-standard.

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