Cross compiler for embedded microcontrollers ?

[Jens Bauer via Digitalmars-d]

Build failed on final gcc.

I normally use newlib and multilib, because I'm developing for 
Cortex-M0, Cortex-M3 and Cortex-M4 and would like to be able to 
switch between those and use the same compiler.
But following the above mentioned instructions seem to suggest 
disabling multilib and using libgcc instead of newlib. Has anyone 
used newlib with a Cortex-M based GDC toolchain ?