Re: [AArch64] nosys.specs and printf

[Alexander Fedotov <alfedotov at gmail dot com>]

ping

On Mon, Oct 2, 2017 at 1:01 PM, Tamar Christina <Tamar.Christina@arm.com> wrote:
> Hi Alex,
>
> Thanks, looks good to me,
> but I can't approve for newlib, so a maintainer will have to take a look.
>
> Regards,
> Tamar
>
>> -----Original Message-----
>> From: Alexander Fedotov [mailto:alfedotov@gmail.com]
>> Sent: 29 September 2017 20:16
>> To: Tamar Christina
>> Cc: newlib@sourceware.org; nd
>> Subject: Re: [AArch64] nosys.specs and printf
>>
>> Here is a patch to correct libnosys configuration for aarch64.
>> Linker warning still be emitted as agreed.
>>
>> Alex
>>
>> On Fri, Sep 22, 2017 at 11:05 AM, Tamar Christina
>> <Tamar.Christina@arm.com> wrote:
>> >
>> >
>> >> -----Original Message-----
>> >> From: Alexander Fedotov [mailto:alfedotov@gmail.com]
>> >> Sent: 20 September 2017 16:24
>> >> To: Jon Beniston
>> >> Cc: Tamar Christina; newlib@sourceware.org; nd
>> >> Subject: Re: [AArch64] nosys.specs and printf
>> >>
>> >> >>That's not doing anything other than setting errno to ENOSYS to
>> >> >>indicate
>> >> it's not available.
>> >> Yes the same as ARM.
>> >>
>> >> So to sum up. We have several points:
>> >> 1. ARM port doesn't warn user about missing _write(). While this
>> >> function is present in final ELF and does nothing.
>> >> 2. AArch64 warns "warning: _write() is not implemented and will always
>> fail"
>> >> while _write() it is present in ELF.
>> >
>> > Both of these are probably correct, while I consider the ARM behaviour
>> > to be the incorrect one It may be so for historical reasons. I'm not really
>> sure.
>> >
>> >> 3. libnosys has inconsistent configuration against rdimon. It is
>> >> impossible to switch between rdimon.specs and nosys.specs.
>> >
>> > I don't quite get what you mean with this, but I assume you mean that
>> > using nosys.specs with AArch64 Results in link errors if you use I/O. Again
>> this is because we don't support nosys for AArch64.
>> >
>> > That said, a patch to have libnosys compile (with warnings) for AArch64
>> would be fine.
>> >
>> > Tamar.
>> >>
>> >> Thoughts ?
>> >>
>> >> Alex
>> >>
>> >> On Wed, Sep 20, 2017 at 5:08 PM, Jon Beniston <jon@beniston.com>
>> wrote:
>> >> >> Well at least _write is here:
>> >> >
>> >> > That's not doing anything other than setting errno to ENOSYS to
>> >> > indicate it's
>> >> not available.
>> >> >
>> >> >
>> >>
>> >>
>> >>
>> >> --
>> >> Best regards,
>> >> AF
>>
>>
>>
>> --
>> Best regards,
>> AF



-- 
Best regards,
AF