unresolved external symbol "int const value"

[JUANDENT]

One file states:

extern const int value;
extern const int this_cpp;
const int mine = value;
const int yours = 40;

and another cpp states

const int value = 12;
const int this_cpp = 33;

Still I get unresolved external symbol "int const value"! Why?

[salem c]

Your other.cpp file also needs to say extern, otherwise it's taken to have internal linkage only.

https://en.cppreference.com/w/cpp/language/cv

The const qualifier used on a declaration of a non-local non-volatile non-template(since C++14)non-inline(since C++17) variable that is not declared extern gives it internal linkage. This is different from C where const file scope variables have external linkage.