[cfe-dev] Block_copy and friends

[Shantonu Sen]

Yes, it's available as part of the compiler-rt LLVM top-level project

Sent from my iPhone

On Nov 25, 2009, at 8:42 AM, Fariborz Jahanian <fjahanian at apple.com>  
wrote:

> You can eliminate the warning on Linux by including the declarations
> yourself:
>
> void *_Block_copy(const void *aBlock);
> void _Block_release(const void *aBlock);
>
> But you need the block's runtime library on linux which I don't think
> it is available yet.
>
> - Fariborz
>
>
>
> On Nov 25, 2009, at 4:04 AM, Niko Matsakis wrote:
>
>> Hello,
>>
>> I am using clang on linux to compile some code I wrote which uses
>> blocks.  Whenever I invoke the Block_copy() function, however, I get
>> warnings because (presumably) there is no prototype and so a default
>> return type of int is assumed:
>>
>>> llvm/Release/bin/clang -fblocks -O3 -c -o bin/interval.o Intervals/
>>> interval.c
>>> Intervals/interval.c:446:37: warning: incompatible integer to
>>> pointer conversion passing 'int',
>>>     expected 'void *'
>>>                       interval_task_t startTask = task(Block_copy
>>> (blk), TASK_COPIED_BLOCK_TAG);
>>>
>>> ^~~~~~~~~~~~~~~
>>> 1 diagnostic generated.
>>
>>
>> On the Mac, I #include <Block.h> to make such warnings go away (or  
>> use
>> Objective-C and fire a copy message).  However, that header file
>> doesn't seem to be included in the clang sources anywhere.  How can I
>> make this work?
>>
>> I apologize if this is the wrong list for this question, but it  
>> seemed
>> the most appropriate from what I saw on the web page.  I looked  
>> around
>> on google for references to Block_copy(), but didn't find much.
>>
>> The code in question is publicly available at <http://github.com/nikomatsakiseth/eth-intervals-c
>>> , if needed.
>>
>> Thanks!
>>
>>
>> Niko
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>
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