ahatanak added inline comments.
================
Comment at: lib/Sema/SemaExprObjC.cpp:3358
var &&
- var->getStorageClass() == SC_Extern &&
+ !var->isThisDeclarationADefinition() &&
var->getType().isConstQualified()) {
----------------
rjmccall wrote:
> ahatanak wrote:
> > rjmccall wrote:
> > > Hmm. Come to think of it, I wonder if we actually care whether the
> > > variable has a definition, given that it's const.
> > >
> > > Well, we can consider that later. I agree that this change is good.
> > If we don't care whether the variable is a definition, it's possible to
> > check whether the variable declaration is directly contained in a language
> > linkage instead (using a function like isSingleLineLanguageLinkage in
> > lib/AST/Decl.cpp).
> Nah, let's keep it simple for now.
>
> Well, maybe the rule ought to be "does a definition exist?" rather than "is
> the specific declaration that lookup found a definition?"
I think you are right. Changed it to a call to hasDefinition.
https://reviews.llvm.org/D31673
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