Re: [crosstool-ng/crosstool-ng] bc9ed3: Adds Raspberry Pi 3 sample config

[Mike Ray <mike@raspberryvi.org>]

Hello Bryan.

I'll see if I can tweak the config myself at the same time.  But because
I'm blind I don't find menuconfig (or other curses apps) all that easy
to use.  Incidentally apologies for top-posting but that's another thing
with not being able to see...and a bit lazy.

But there's plenty of ARM Cortex A53 stuff online so I might be able to
just use one of the other configs to hack it.

Mike

On 03/03/2016 15:19, Bryan Hundven wrote:
> 
>> On Mar 3, 2016, at 4:45 AM, Bryan Hundven <bryanhundven@gmail.com> wrote:
>>
>>
>>> On Mar 2, 2016, at 10:23 PM, Mike Ray <mike@raspberryvi.org> wrote:
>>>
>>> Hello.
>>>
>>> Good to know it's not just me being an idiot!  I was hoping to use a
>>> toolchain generated with ct-ng to build a 64-bit root file-system using
>>> buildroot or just using the toolchain with cross-LFS.
>>
>> Indeed! That’s the spirit! :)
>>
>>>
>>> I will continue to tinker and at the same time wait to see if there are
>>> changes to this sample.
>>
>> There may only be one change to the sample, one line added, but the real change will happen in two files (maybe 3). And really, they aren’t big changes.
>>
>>>
>>> It's true that at the moment there are only 32-bit images available.  I
>>> expect ArchARM to come up with a 64-bit image soon enough though.
>>
>> Indeed, but someone has to push the edge and give it a go?
>>
>> I need to get myself a PI3. I have to wait till the 15th to order mine, but that doesn’t mean I can’t start getting ct-ng there. I know there are others out there waiting for aarch64 support, so let’s do this.
>>
>>>
>>> Mike
>>
>> Cheers,
>>
>> -Bryan
> 
> Well, I feel like I totally missed the mark yesterday. I didn’t realize RPI3 was a 64-bit cpu, and I assumed ct-ng did not have aarch64 support. 0/2…
> 
> On the plus side, I have something to test:
> https://github.com/crosstool-ng/crosstool-ng/pull/362
> 
> Now, the hard part. You can’t run 64-bit binaries on 32-bit.
> Also, I’m not sure if you can boot aarch64 from a 32-bit bootloader?
> So you may have to start with making u-boot?
> 
> I wish I had an RPI3, so I could help with that, but for now I’ll just have to be patient and wait to hear your progress. If you do make progress, and need help, post a git repo somewhere and I’ll try to help if I can.
> 
> -Bryan
> 
>>
>>>
>>>
>>> On 03/03/2016 00:28, Stefan Hallas Mulvad wrote:
>>>> Hi Bryan,
>>>>
>>>> I did test this, but at this time there’s (to my knowledge) no os images available which supports 64 bit. Mine came with 32 bit raspbian,
>>>>
>>>> The chip is capable of running in both 32/64 bit mode - but 64 bit must come down the road as software becomes available.
>>>>
>>>> Best regards,
>>>> Stefan Mulvad
>>>>
>>>>
>>>>> On Mar 2, 2016, at 4:22 PM, Bryan Hundven <bryanhundven@gmail.com> wrote:
>>>>>
>>>>> Hello Mike,
>>>>>
>>>>>
>>>>>> On Mar 2, 2016, at 3:51 PM, Mike Ray <mike@raspberryvi.org> wrote:
>>>>>>
>>>>>> Hello.
>>>>>>
>>>>>> I have used this sample to build a toolchain.
>>>>>>
>>>>>> However I get 32-bit executables and the '-m64' switch is not recognized.
>>>>>
>>>>> Sometimes, I expect that when people open pull-requests that they actually test what they submit and I don’t have to do any work.
>>>>>
>>>>> Today I failed at that. Yeay!
>>>>>
>>>>> Arm64/aarch64 is kind of a new thing in crosstool-NG, and isn’t well supported.
>>>>>
>>>>> I took the pull-request for the sample without looking at the specs for the new raspberry pi 3. I had no clue it was 64-bit.
>>>>>
>>>>> Looks like I will have to take some time and get this going.
>>>>>
>>>>>>
>>>>>> There is obviously a gap in my knowledge which I can't seem to find an
>>>>>> answer for on Google.
>>>>>>
>>>>>> Can I compile a 64-bit executable?  If so, how?
>>>>>>
>>>>>> Thanks for any help.
>>>>>>
>>>>>> Mike
>>>>>>
>>>>>>
>>>>>
>>>>> Thanks for reporting this issue!
>>>>>
>>>>> https://github.com/crosstool-ng/crosstool-ng/issues/361
>>>>>
>>>>> Cheers,
>>>>>
>>>>> -Bryan
>>>>
>>>
>>>
>>> --
>>> Michael A. Ray
>>> Analyst/Programmer
>>> Witley, Surrey, South-east UK
>>>
>>> Eyes-free Linux:
>>> http://eyesfreelinux.ninja/
>>>
>>> Raspberry VI:
>>> http://www.raspberryvi.org/
>>>
>>>
>>> --
>>> For unsubscribe information see http://sourceware.org/lists.html#faq
>>>
>>
> 


-- 
Michael A. Ray
Analyst/Programmer
Witley, Surrey, South-east UK

Eyes-free Linux:
http://eyesfreelinux.ninja/

Raspberry VI:
http://www.raspberryvi.org/


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