Linkage

[caduardo21]

I'm reading a book called Pointers on C and I believe I have found an error but I just want to make sure before contacting the author. Consider this piece of code:

typedef char *a;
int b;
int c (int d)
{
    int e;
    int f(int g);
    ...
}

Here's part of it's description:

By default, the linkage of identifiers b, c, and f is external...

Why is he saying that linkage of f is external if it is inside function c? Thanks.

[Salem]

> Why is he saying that linkage of f is external if it is inside function c?
Because it isn't static.

There is a subtle difference between linkage and scope here - the linkage is external, but the scope is local to function c()

int c (int d) {
  int f(int g);
  return f(d);
}

int d ( void ) {
  return f(1);  /* this f() is implicitly declared */
}