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llvm-gcc treats a tentative definition with a previous

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(or follow up) extern declaration with weak_import as 
an actual definition. make clang follows this behavior. 
// rdar://9538608
llvm-gcc treats an extern declaration with weak_import

llvm-svn: 133450
This commit is contained in:
Fariborz Jahanian
2011-06-20 17:50:03 +00:00
parent 61dbf7730a
commit ab578bf355
3 changed files with 34 additions and 1 deletions
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3
clang/lib/CodeGen/CodeGenModule.cpp
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@@ -1351,7 +1351,8 @@ CodeGenModule::GetLLVMLinkageVarDefinition(const VarDecl *D,
((!CodeGenOpts.NoCommon && !D->getAttr<NoCommonAttr>()) ||
D->getAttr<CommonAttr>()) &&
!D->hasExternalStorage() && !D->getInit() &&
!D->getAttr<SectionAttr>() && !D->isThreadSpecified()) {
!D->getAttr<SectionAttr>() && !D->isThreadSpecified() &&
!D->getAttr<WeakImportAttr>()) {
// Thread local vars aren't considered common linkage.
return llvm::GlobalVariable::CommonLinkage;
}