LibreOffice fails to link when built with recent clang

[Stephan Bergmann]

On 06/18/2016 10:28 PM, Davide Italiano wrote:
> on Fedora 22

I guess F22 has a libstdc++ using abi_tag by now, too (as have F23 and 
later).

> Clang Version:
> $ ~/work/llvm/build-release/bin/clang++ --version
> clang version 3.9.0 (trunk 272933) (llvm/trunk 273027)
> Target: x86_64-unknown-linux-gnu
> Thread model: posix
> InstalledDir: /home/davide/work/llvm/build-release/bin

You need the patches from <http://reviews.llvm.org/D17567> "[GCC] 
PR23529 Sema part of attrbute abi_tag support" and 
<http://reviews.llvm.org/D18035> "[GCC] PR23529 Mangler part of attrbute 
abi_tag support" to make Clang support the abi_tag attribute.