gcc5 libstdc++ abi transition breaks clang building against libstdc++, the default in debian

Hi, clang doesn't support the abi_tag attribute, see: https://llvm.org/bugs/show_bug.cgi?id=23529 And yet I couldn't find a single bug report in debians llvm packages mentioning this problem; I think it was irresponsible to push the transition while such bugs are not fixed. Compiling with clang

Re: gcc5 libstdc++ abi transition breaks clang building against libstdc++, the default in debian

clang doesn't support the abi_tag attribute, see: https://llvm.org/bugs/show_bug.cgi?id=23529 And yet I couldn't find a single bug report in debians llvm packages mentioning this problem; https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=797917