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Re: mt_allocator.cc assumes sizeof(size_t) == sizeof(void *)


On 11/7/2014 9:25 AM, Paolo Carlini wrote:
> Hi,
>
> On 11/07/2014 04:07 PM, Joel Sherrill wrote:
>> Hi
>>
>> On m32c-rtems, we have a build error in C++ because size_t
>> is 16-bits and pointers are 24 bits. m32c-elf probably does not
>> enable __GTHREAD support like rtems does.  Since this is code
>> shared across targets, what is the best way to fix this?
> I don't know the exact opinion of the other library maintainers, but 
> personally I consider mt_allocator an old experiment, which, definitely, 
> to make any sense today would need profound changes. In particular, I 
> don't think we can hope to get something useful from it when size_t is 
> 16 bits and, more importantly, pointers are 24 bits. Thus, my 
> recommendation would be just arranging for its code not to break 
> bootstrap, nothing more than that.
OK. I am building now with the size_t changed to uintptr_t. I tried to get
the type definition by including <cstdint> but it didn't compile. Using
<stdint.h>, the bootstrap is moving along.

I will post a patch once the bootstrap is finished.

Thanks for the quick feedback.
> Paolo.
>

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill@OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
Support Available                (256) 722-9985


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