[cfe-dev] GCC vs clang -- cxx11 ABI issue?

[Joerg Sonnenberger via cfe-dev]

On Thu, Jul 07, 2016 at 09:13:28AM +0000, Paweł Bylica via cfe-dev wrote:
> Hi,
> 
> I was mixing libraries built with clang and GCC before, but recently I was
> be an issue:
> 
> undefined reference to 'llvm::sys::getProcessTriple[abi:cxx11]()'
> 
> when building with GCC and linking in the LLVM libraries built with clang.
> 
> GCC / libstdc++: 5.3.1
> clang: 3.8.0
> 
> Because the getProcessTriple() returns std::string I suspect that GCC
> expects the new string ABI to be used here, but looks like clang produced
> the function with the old version.
> 
> Is this a bug?

Yes, it is a bug in GCC that they broke the Itanium ABI by introducing a
custom mangling. Of course, they will tell you that it is a feature...

Joerg