I could give two cents about GCC compiler Hardening flags. Hell, the only interesting part of Debian is the fact its entire repo is gearing up to be LLVM/Clang compliant. The moment LLVM/Clang can compile Debian, RedHat, SuSE more acceptable Linux based distros is the moment big engineering firms switch the likes ANSYS, Catia, COMSOL, and others away from GCC and give themselves a celebration by welcoming LLVM/Clang with open arms. All of the work for OpenGL/OpenCL in the pipeline for MESA, and Video Drivers are making huge leaps with LLVM/Clang and not GCC.
Sorry folks, but I look forward to the moment FreeBSD 10 arrives so I can say good-bye to Linux. All the work by Intel, Nvidia and AMD with quality GPU drivers and GPGPU stacks for OpenCL/OpenGL are all coming to FreeBSD, as well. It would be truly ironic if FreeBSD 10.x becomes the third largest Desktop OS in the world with Linux continuing to have pissing contests over which DE is best or having 10 DE is better.
Hell, the entire LLVM/Clang stack 3.3 Trunk oozing into Debian is still fucked up and requires an asinine amount of GCC4.7 and GCC4.8 from Experimental to work. That makes absolutely zero sense, but it does.
In my opinion, that makes the effort DOA.