// PR c++/89325 // { dg-do compile } // { dg-options "-Wattributes" } struct A { friend int &operator<< (int &i, const A &) { return i; } }; // { dg-bogus "previous definition" } #pragma GCC optimize ("-fno-ipa-cp-clone") struct B {}; int &operator<<(int &, const B &); // { dg-bogus "optimization attribute on '\[^\n\r]*' follows definition but the attribute doesn.t match" }