What do __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS mean?

Question

I see this in the standard C++ libraries for my system, as well as some of the headers in a library I\'m using.

What are the semantics of these two definitions? Is

Answer 1

In stdint.h under C++, they control whether to define macros like INT32_MAX or INT32_C(v). See your platform's stdint.h for additional information.