Is strcpy_s part of the C++ Standard? Or only part of MS Visual C++

Using the function strcpy in MS Visual Studio gives me an error saying I should use strcpy_s which is safer to use. Is strcpy_s part of the C++ standard? Or is it only part of Microsoft Visual C++?

Will code containing strcpy_s only compile in Visual Studio?

strcpy_s() is an optional part of C11 (more formally called a "conditional feature". Implementations are permitted to not implement the "Bounds-checking interfaces" standardized in Annex K.

Some other conditional features of C11 include:

• atomics
• complex types
• threads
• variable length arrays (the interesting this about this is that VLAs were not optional in C99)