Porting from old to new GCC versions

[Chung-Ju Wu]

On 7/11/13 4:23 AM, Hendrik Greving wrote:
> Hi, I have a hard time finding a good description of how old, obsolete
> and now poisoned target macros and backend switches had been replaced
> with. Examples are TARGET_SWITCHES, or CAN_DEBUG_WITHOUT_FP. I am
> porting from a very old compiler version. Is there any documentation
> (except ChangeLog which doesn't say much) available for these kind of
> patches?
>
> Regards,
> Hendrik Greving
>

IMHO, the GCC Internals is the best documentation for your reference.
Some obsolete macros are explicitly described in chapter 17.9.
Other deprecated macros spread out over chapter 17 (e.g. FUNCTION_VALUE).

My suggestion is to review your target macros one by one.  See if they
still can be found in GCC Internals.


Best regards,
jasonwucj