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


On 7 November 2014 16:56, Joel Sherrill wrote:
>
> 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.

Agreed.

> 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.

Did you try std::uintptr_t?


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