error C2039: 'memchr' : is not a member of '`global namespace''

Question

It has been quite a while since I am getting this error in the standard header file for no apparent reason. A google search brought up many answers but none

Answer 1

Preprocessor defines are pretty handy when you want to avoid this sort of mistake.

//whatev.h
#ifndef WHATEV
#define WHATEV

// your code here

#endif