linkage4.c

gcc-you can use this code to learn something about gcc, and inquire further into linux,

// Build don't link:
// Origin: Mark Mitchell <[e-mail]>

static int strlen (const char*) { return 0; }

template <int (*)(const char*)>
void f () {}

// Check that the strlen declaration here is given internal linkage by
// using it as a non-type template argument, and expecting an error.
template void f<strlen>(); // ERROR - no matching template