warn3.c

来自「用于进行gcc测试」· C语言 代码 · 共 27 行

// Tests for various visibility mismatch situations.

// { dg-require-visibility "" }

// { dg-final { scan-not-hidden "_ZN1A1fEv" } }

struct __attribute ((visibility ("hidden"))) A
{
  // This is OK, A::f gets default visibility.
  __attribute ((visibility ("default"))) void f ();
};

void A::f() { }

// This gets a warning because B objects might rely
// on hidden symbols from A.
struct B
{				// { dg-warning "visibility" }
  A a;
};

// This one has explicit visibility, so it doesn't get a warning.
struct __attribute ((visibility ("default"))) C
{
  A a;
};