[LLVMdev] Compiler warnings with gcc-4.7.1

[Chandler Carruth]

-Wenum-compare is buggy / bogus. We should turn this warning off in our
build scripts if possible.


On Tue, Jun 26, 2012 at 5:15 PM, Yuri <yuri at rawbw.com> wrote:

> I just switched gcc from 4.6.2 to 4.7.1 and see the massive amount of
> warnings, see few examples below.
> They mostly didn't exist with gcc-4.6.2.
>
> rev.159224
>
> Yuri
>
>
> /usr/home/yuri/llvm-2012-06/latest-unpatched/llvm-fix/include/llvm/ADT/PointerUnion.h:56:10:
> warning: enumeral mismatch in conditional expression:
>
> ‘llvm::PointerLikeTypeTraits<llvm::PointerUnion<clang::FunctionTemplateDecl*,
> clang::MemberSpecializationInfo*> >::<anonymous enum>’ vs
>
> ‘llvm::PointerLikeTypeTraits<llvm::PointerUnion<clang::FunctionTemplateSpecializationInfo*,
> clang::DependentFunctionTemplateSpecializationInfo*> >::<anonymous
> enum>’
>
> [-Wenum-compare]/usr/home/yuri/llvm-2012-06/latest-unpatched/llvm-fix/include/llvm/ADT/PointerUnion.h:56:10:
> warning: enumeral mismatch in conditional expression:
> ‘llvm::PointerLikeTypeTraits<const clang::Type*>::<anonymous enum>’ vs
> ‘llvm::PointerLikeTypeTraits<clang::TypeSourceInfo*>::<anonymous enum>’
> [-Wenum-compare]
>
> /usr/home/yuri/llvm-2012-06/latest-unpatched/llvm-fix/include/llvm/ADT/PointerUnion.h:
> In instantiation of ‘class
>
> llvm::PointerUnionUIntTraits<llvm::PointerUnion<clang::FunctionTemplateDecl*,
> clang::MemberSpecializationInfo*>,
> llvm::PointerUnion<clang::FunctionTemplateSpecializationInfo*,
> clang::DependentFunctionTemplateSpecializationInfo*> >’:
>
> /usr/home/yuri/llvm-2012-06/latest-unpatched/llvm-fix/include/llvm/ADT/PointerIntPair.h:43:8:
> required from ‘class llvm::PointerIntPair<void*, 1u, bool,
>
> llvm::PointerUnionUIntTraits<llvm::PointerUnion<clang::FunctionTemplateDecl*,
> clang::MemberSpecializationInfo*>,
> llvm::PointerUnion<clang::FunctionTemplateSpecializationInfo*,
> clang::DependentFunctionTemplateSpecializationInfo*> > >’
>
> /usr/home/yuri/llvm-2012-06/latest-unpatched/llvm-fix/include/llvm/ADT/PointerUnion.h:84:11:
> required from ‘class
> llvm::PointerUnion<llvm::PointerUnion<clang::FunctionTemplateDecl*,
> clang::MemberSpecializationInfo*>,
> llvm::PointerUnion<clang::FunctionTemplateSpecializationInfo*,
> clang::DependentFunctionTemplateSpecializationInfo*> >’
>
> /usr/home/yuri/llvm-2012-06/latest-unpatched/llvm-fix/include/llvm/ADT/PointerUnion.h:347:11:
> required from ‘class llvm::PointerUnion4<clang::FunctionTemplateDecl*,
> clang::MemberSpecializationInfo*,
> clang::FunctionTemplateSpecializationInfo*,
> clang::DependentFunctionTemplateSpecializationInfo*>’
>
> /usr/home/yuri/llvm-2012-06/latest-unpatched/llvm-fix/tools/clang/tools/libclang/../../include/clang/AST/Decl.h:1507:5:
> required from here
>
> /usr/home/yuri/llvm-2012-06/latest-unpatched/llvm-fix/include/llvm/ADT/PointerUnion.h:56:10:
> warning: comparison between ‘enum
>
> llvm::PointerLikeTypeTraits<llvm::PointerUnion<clang::FunctionTemplateDecl*,
> clang::MemberSpecializationInfo*> >::<anonymous>’ and ‘enum
>
> llvm::PointerLikeTypeTraits<llvm::PointerUnion<clang::FunctionTemplateSpecializationInfo*,
> clang::DependentFunctionTemplateSpecializationInfo*> >::<anonymous>’
> [-Wenum-compare]
>
> /usr/home/yuri/llvm-2012-06/latest-unpatched/llvm-fix/include/llvm/ADT/PointerUnion.h:56:10:
> warning: enumeral mismatch in conditional expression:
>
> ‘llvm::PointerLikeTypeTraits<llvm::PointerUnion<clang::FunctionTemplateDecl*,
> clang::MemberSpecializationInfo*> >::<anonymous enum>’ vs
>
> ‘llvm::PointerLikeTypeTraits<llvm::PointerUnion<clang::FunctionTemplateSpecializationInfo*,
> clang::DependentFunctionTemplateSpecializationInfo*> >::<anonymous
> enum>’ [-Wenum-compare]
>
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