That's what I thought too, until I found that there exists C++ ABI on linux. I tried to link together two small files, both using iostreams, one compiled with Intel C++, the other with g++, and it worked.
Though I'm in doubt [haven't tested it yet] whether it would have worked had I tried to use something std::vector across functions compiled with different compilers.
Though I'm in doubt [haven't tested it yet] whether it would have worked had I tried to use something std::vector across functions compiled with different compilers.