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



On November 8, 2014 9:00:02 AM CST, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
>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?

Doh!! You meant putting std:: in front and using cstdint.  No. I will try that.

Sorry for missing the point.


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