"Paulo J. Matos" <pa...@matos-sorge.com> writes:

> Is there anything documenting porting backend between GCC major versions 
> (GCC4.6 - GCC4.7), in order to avoid these questions?

Basically, everything related to library code should move from
gcc/config/CPU to libgcc/config/CPU.  I don't know of any specific
documentation about this change.

Ian

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