Fix compilation errors with libstdc++v3 for AVR target and allow --enable-libstdcxx

[Felipe Magno de Almeida]

On Fri, Sep 16, 2016 at 2:42 AM, Marc Glisse <marc.glisse@inria.fr> wrote:
> On Thu, 15 Sep 2016, Felipe Magno de Almeida wrote:
>
> +               || sizeof(uint32_t) == sizeof(void*)
> +                || sizeof(uint16_t) == sizeof(void*),
>
> Indentation is off?
>
>> Call _M_extract_* functions family through temporary int objects
>
>
> Would it make sense to use a template type instead of int for this
> parameter? Or possibly have a typedef that defaults to int (what POSIX
> requires). The hard case would be a libc that uses bitfields for the fields
> of struct tm (that could save some space), but I don't think anyone does
> that.

I've tried both approaches. Templates were causing problems of not
defined instantations because they were being used as ints too
in other _M_extract functions through a tmp integer. And typedef's
caused the same problem of having to use a tmp value of the right
type but for example _M_extract_wday_or_month could not have the
same type (in AVR they do) and I'd have to use a temporary anyway
then.

This was the least intrusive way.

>> float pointing
>
> floating point?

:D. Yes.

> A ChangeLog entry would also help.

OK.

> --
> Marc Glisse

Regards,
-- 
Felipe Magno de Almeida