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

[Bryan Hundven <bryanhundven@gmail.com>]

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> On Mar 3, 2016, at 7:52 AM, Mike Ray <mike@raspberryvi.org> wrote:
> 
> 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.

I think the toolchain built here should work fine, I’m just saying that the platform itself might need a little love. When I get my rpi3, I’ll definitely be wanting to running the test-suite on it asap.


> 
> 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

PS: it’s hard to keep context of the message when you top post. Please don’t top post. :)
https://en.wikipedia.org/wiki/Posting_style

> 
> 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/
> 
> 
> --
> For unsubscribe information see http://sourceware.org/lists.html#faq
> 


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