GCC 6.x seems working

[bebbo]

It's time to merge the changes:

• gcc 6.3.1 seems working
• gcc 6.3.1 produces good code
• enabled also objective c
• various fixes here and there

pick what you want :-)

[cahirwpz]

Hi bebbo! I'm suprised to see that someone works on gcc 6.x. That's great news!

I find your work to be valuable for the community and I'd like it to be merged. However I find the sheer size and scope of the pull request to be overwhelming. I could review and merge changes provided that they're relatively small (up to 100 lines?) and goal focused (no unnecessary changes, one funcionality at a time).

Do you have any testing procedure so that you know your changes are correct? How can you prove nothing got broken by a modification? After all binutils and gcc are complex beasts.

For know I find your PR to be a proof of concept rather than a complete solution. For the starter I'd like you to merge changes from submodules with respective master branches (e.g. binutils-2.14 and so on).

Thanks for good work! I'm looking forward to your feedback.