what needs arm-elf-nonlinux-gcc? what needs arm-elf-nonlinux-gccgo?

[Steffen Dettmer]

Hi,

I would like to build a cross-compiler toolchain for embedded ARM
targets (to replace arm-elf-gcc-3.4.3).

The targets are proprietary and has some special system libraries (so
-nostdlib is used and linkerscripts).
I think gcc needs some functions from the system (such as some
malloc() for C++ operator new etc). I searched FAQ and the wiki but
did not find much information about how to compile such a compiler
toolchain.
I've read about "--with-local-prefix". Should I create some
somepath/include and copy the systems "libc" headers into it (there
are just a very few functions known from ANSI-C) and give
--with-local-prefix=somepath/include? I cannot believe that this is
really that simple.

I would like to play with Google Go (language). I've read that on some
platforms with gcc-4.6.0 it might work, on some not. Where do I find
more information? Would it be worth a try?
Why doesn't it work on all platforms where gcc code works? I guess
because of some dependencies to the systems? Could those be fullfilled
by writing some functions (to create threads, mutexes)?

Any hints and pointers appreciated!

Regards,
Steffen