extern const char* const SOME_CONSTANT giving me linker errors

Question

I want to provide a string constant in an API like so:

extern const char* const SOME_CONSTANT;

But if I define it in my static library sour

Answer 1

The problem could be that the extern declaration is not visible in the source file defining the constant. Try repeating the declaration above the definition, like this:

extern const char* const SOME_CONSTANT;  //make sure name has external linkage
const char* const SOME_CONSTANT = "test";  //define the constant