1 // RUN: %clang_cc1 -triple x86_64-win32 -fms-compatibility -fms-extensions -fsyntax-only -verify -std=c++11 %s
2 // RUN: %clang_cc1 -triple x86_64-unknown-linux -fms-compatibility -fms-extensions -fsyntax-only -verify -std=c++11 %s
3 // RUN: %clang_cc1 -triple x86_64-win32-macho -fms-compatibility -fms-extensions -fsyntax-only -verify -std=c++11 %s
4
5 // MSVC produces similar diagnostics.
6
foo()7 __declspec(selectany) void foo() { } // expected-error{{'selectany' can only be applied to data items with external linkage}}
8
9 __declspec(selectany) int x1 = 1;
10
11 const __declspec(selectany) int x2 = 2; // expected-error{{'selectany' can only be applied to data items with external linkage}}
12
13 extern const __declspec(selectany) int x3 = 3;
14
15 extern const int x4;
16 const __declspec(selectany) int x4 = 4;
17
18 // MSDN says this is incorrect, but MSVC doesn't diagnose it.
19 extern __declspec(selectany) int x5;
20
21 static __declspec(selectany) int x6 = 2; // expected-error{{'selectany' can only be applied to data items with external linkage}}
22
23 // FIXME: MSVC accepts this and makes x7 externally visible and comdat, but keep
24 // it as internal and not weak/linkonce.
25 static int x7; // expected-note{{previous definition}}
26 extern __declspec(selectany) int x7; // expected-warning{{attribute declaration must precede definition}}
27
asdf()28 int asdf() { return x7; }
29
30 class X {
31 public:
X(int i)32 X(int i) { i++; };
33 int i;
34 };
35
36 __declspec(selectany) X x(1);
37
38 namespace { class Internal {}; }
39 __declspec(selectany) auto x8 = Internal(); // expected-error {{'selectany' can only be applied to data items with external linkage}}
40
41
42 // The D3D11 headers do something like this. MSVC doesn't error on this at
43 // all, even without the __declspec(selectany), in violation of the standard.
44 // We fall back to a warning for selectany to accept headers.
45 struct SomeStruct {
46 int foo;
47 };
48 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}}
49
50 // It should be possible to redeclare variables that were defined
51 // __declspec(selectany) previously.
52 extern const SomeStruct some_struct;
53
54 // Without selectany, this should stay an error.
55 const SomeStruct some_struct2; // expected-error {{default initialization of an object of const type 'const SomeStruct' without a user-provided default constructor}}
56