evaluate gcc porting

[stsp]

With help of clang guys I was able
to evaluate the gcc porting. While I
still think of it as completely impossible,
at least I think of it. :) And as the result,
filled this bug:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109824
Depending on its resolution, the gcc
port may or may not be attempted.
So first, lets just monitor it.