1*67e74705SXin Li // RUN: %clang_cc1 -fms-compatibility -fms-extensions -fsyntax-only -verify -std=c++11 %s 2*67e74705SXin Li // MSVC produces similar diagnostics. 3*67e74705SXin Li foo()4*67e74705SXin Li__declspec(selectany) void foo() { } // expected-error{{'selectany' can only be applied to data items with external linkage}} 5*67e74705SXin Li 6*67e74705SXin Li __declspec(selectany) int x1 = 1; 7*67e74705SXin Li 8*67e74705SXin Li const __declspec(selectany) int x2 = 2; // expected-error{{'selectany' can only be applied to data items with external linkage}} 9*67e74705SXin Li 10*67e74705SXin Li extern const __declspec(selectany) int x3 = 3; 11*67e74705SXin Li 12*67e74705SXin Li extern const int x4; 13*67e74705SXin Li const __declspec(selectany) int x4 = 4; 14*67e74705SXin Li 15*67e74705SXin Li // MSDN says this is incorrect, but MSVC doesn't diagnose it. 16*67e74705SXin Li extern __declspec(selectany) int x5; 17*67e74705SXin Li 18*67e74705SXin Li static __declspec(selectany) int x6 = 2; // expected-error{{'selectany' can only be applied to data items with external linkage}} 19*67e74705SXin Li 20*67e74705SXin Li // FIXME: MSVC accepts this and makes x7 externally visible and comdat, but keep 21*67e74705SXin Li // it as internal and not weak/linkonce. 22*67e74705SXin Li static int x7; // expected-note{{previous definition}} 23*67e74705SXin Li extern __declspec(selectany) int x7; // expected-warning{{attribute declaration must precede definition}} 24*67e74705SXin Li asdf()25*67e74705SXin Liint asdf() { return x7; } 26*67e74705SXin Li 27*67e74705SXin Li class X { 28*67e74705SXin Li public: X(int i)29*67e74705SXin Li X(int i) { i++; }; 30*67e74705SXin Li int i; 31*67e74705SXin Li }; 32*67e74705SXin Li 33*67e74705SXin Li __declspec(selectany) X x(1); 34*67e74705SXin Li 35*67e74705SXin Li namespace { class Internal {}; } 36*67e74705SXin Li __declspec(selectany) auto x8 = Internal(); // expected-error {{'selectany' can only be applied to data items with external linkage}} 37*67e74705SXin Li 38*67e74705SXin Li 39*67e74705SXin Li // The D3D11 headers do something like this. MSVC doesn't error on this at 40*67e74705SXin Li // all, even without the __declspec(selectany), in violation of the standard. 41*67e74705SXin Li // We fall back to a warning for selectany to accept headers. 42*67e74705SXin Li struct SomeStruct { 43*67e74705SXin Li int foo; 44*67e74705SXin Li }; 45*67e74705SXin Li extern const __declspec(selectany) SomeStruct some_struct; // expected-warning {{default initialization of an object of const type 'const SomeStruct' without a user-provided default constructor is a Microsoft extension}} 46*67e74705SXin Li 47*67e74705SXin Li // It should be possible to redeclare variables that were defined 48*67e74705SXin Li // __declspec(selectany) previously. 49*67e74705SXin Li extern const SomeStruct some_struct; 50*67e74705SXin Li 51*67e74705SXin Li // Without selectany, this should stay an error. 52*67e74705SXin Li const SomeStruct some_struct2; // expected-error {{default initialization of an object of const type 'const SomeStruct' without a user-provided default constructor}} 53