Yes, I am trying to build 4.9.4, again. I built it first with multilib support (probably with the help of 32bit libraries installed through the package manager). However when I try to run any c++ 32bit program (c programs works fine), it ends with segmentation fault. I believe that is due to a conflict between the 4.9.4 gcc/g++ and libstdc++.so.6.0.20 with the old libraries from gcc 4.4.3 on /usr/lib/... Finally, I am not sure that only reinstall gcc 4.4.3 would solve it. Reinstall ia32 libs might do it, but first I have a few things to try. To check Gcc configure.ac and look for the above error messages. Plus, I might created a backup copy of /usr/lib/gcc/x86_64-linux-gnu/4.4.3/ and replace it with /usr/lib/gcc/x86_64-linux-gnu/4.9.4. If that works, I won't even need to do a system wide 4.9.4 install, neither reinstall anything from the package manager (that I would have to uninstall again latter)
