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-rw-r--r--clang/lib/CodeGen/CodeGenModule.cpp8
1 files changed, 7 insertions, 1 deletions
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 07368790372..3a967c6fdc3 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -1937,7 +1937,13 @@ CodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D,
return llvm::Function::DLLImportLinkage;
else if (D->hasAttr<DLLExportAttr>())
return llvm::Function::DLLExportLinkage;
- else if (D->hasAttr<WeakAttr>()) {
+ else if (D->hasAttr<SelectAnyAttr>()) {
+ // selectany symbols are externally visible, so use weak instead of
+ // linkonce. MSVC optimizes away references to const selectany globals, so
+ // all definitions should be the same and ODR linkage should be used.
+ // http://msdn.microsoft.com/en-us/library/5tkz6s71.aspx
+ return llvm::GlobalVariable::WeakODRLinkage;
+ } else if (D->hasAttr<WeakAttr>()) {
if (GV->isConstant())
return llvm::GlobalVariable::WeakODRLinkage;
else
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