[llvm-dev] linkonce_odr & coff

[Reid Kleckner via llvm-dev]

Use comdats. linkonce_odr no longer implicitly creates comdats on COFF:
  if (!Triple.isOSBinFormatMachO())
    GV->setComdat(MyModule.getOrInsertComdat(GV->getName()));

I think the same is true for ELF, but linkonce_odr gives things weak
linkage in addition to making them comdat.

On Wed, Jun 1, 2016 at 9:06 AM, Carlo Kok via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> I have @_rtti_a_a = linkonce_odr constant in two files that end up as coff
> object files. Shoudln't the linkonce_odr prevent duplicate symbol:
> __rtti_a_a \consoleapplication149.o and __rtti_a_a island.lib(island.o)
> from happening in LLD?
>
> If not what alternative can I use? THis is used for template like
> generics, so having duplicate functions and globals is going to happen a
> lot)
>
> (Side note: How do I see linkonce* when dumping object files?)
> --
> Carlo Kok
> RemObjects Software
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> llvm-dev at lists.llvm.org
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