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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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