Re: Multiple declarations of objc_msgSend_stret
Re: Multiple declarations of objc_msgSend_stret
- Subject: Re: Multiple declarations of objc_msgSend_stret
- From: Jean-Daniel Dupas <email@hidden>
- Date: Fri, 4 Feb 2011 10:16:59 +0100
Oups, wrong mailing list (and subject). Sorry for the noise.
Le 4 févr. 2011 à 09:54, Jean-Daniel Dupas a écrit :
> I don't know what the status of this feature in the last Xcode version, but clang supports the unused attribute on obj-c ivar.
>
> I have something like this to workaround this kind of warning:
>
> #if __has_feature(attribute_objc_ivar_unused)
> #define UNUSED_IVAR __attribute__((unused))
> #else
> #define UNUSED_IVAR
> #endif
>
> and then
>
> @interface Foo {
> int ivar UNUSED_IVAR;
> }
>
> @end
>
>
>
> Le 4 févr. 2011 à 00:59, James Bucanek a écrit :
>
>> Hamish Allan <mailto:email@hidden> wrote (Thursday, February 3, 2011 4:05 PM -0000):
>>
>>> On 3 February 2011 22:46, James Bucanek <email@hidden> wrote:
>>>
>>>> I have numerous instance variables which are
>>>> only used by categories.
>>>
>>> If you compile using -Xclang -fobjc-nonfragile-abi2, you can declare
>>> instance variables in class extensions and kill two birds (improve
>>> locality of reference, remove warnings) with one stone.
>>
>> I thought non-fragile instance variables required 64-bit Intel and/or 10.5.
>>
>> I still have to compile for 32-bit, PPC, and (occasionally) OS 10.4, so moving my instance variables into categories doesn't seem practical at this point in time.
>>
>>
>>
>> James Bucanek
>> ____________________________________________________________________
>> Author of Professional Xcode 3 ISBN: 9780470525227
>> <http://www.proxcode3.com/>
>> and Learn Objective-C for Java Developers ISBN: 9781430223696
>> <http://objectivec4java.com/>
>>
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>
> -- Jean-Daniel
>
>
>
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-- Jean-Daniel
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