[patch] avoid ABI warnings on arm when running the libstdc++v3 testsuite

[Paolo Carlini]

On 01/15/2010 01:22 AM, Joseph S. Myers wrote:
> On Thu, 14 Jan 2010, Paolo Carlini wrote:
>
>   
>> On 01/14/2010 06:54 PM, Matthias Klose wrote:
>>     
>>> The attached patch runs the testsuite with -Wno-abi on arm targets. Ok
>>> for the trunk and the 4.4 branch? Should the target be more restricted?
>>>       
>> Does not seem the right fix to me, the real issue is that *user code*
>> will warn, unless the user passes -Wno-abi! How happens that a system
>> header spills a warning, again? We have been working on those issues for
>>     
> (a) It's a note (inform ()), not a warning; the general system header 
> warning suppression may not work for those.
>   
Interesting clarification... Now, why such inform are enabled and
disabled via -W options? And why the manuale describes -Wabi as: "Warn
when G++ generates..."? Frankly I'm quite a bit confused...

Anyway, besides these "theoretical" and academic curiosities of mine, I
hope we all agree that any diagnostic message !=  hard error, in other
terms, anything allowing anyway compilation to proceed, should be
suppressed in system headers. Pragmatically, I don't think we really
care about anything else, especially at this Stage.

Paolo.