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