Is the function strcmpi in the C standard libary of ISO?

Question

I noticed that the difference between linux and windows. strcmpi is in windows C standard libary implementation but it is not in GNU\'s C standard libary implementation. Is

Answer 1

Nope, a quick CTRL+F in the standard returns nothing for strcmpi. This means that it is a non-standard extension (of which both Windows and GNU have a lot).