[ELDK] Is there an ELDK NTP or other time keeping package?
Larry Baker
baker at usgs.gov
Wed Aug 21 09:51:05 CEST 2013
On Aug 21, 2013, at 12:43 AM, Larry Baker wrote:
> Stefano,
>
> On Aug 21, 2013, at 12:13 AM, Stefano Babic wrote:
>
>> Hi Larry,
>>
>> On 21/08/2013 07:27, Larry Baker wrote:
>>> I tried to add the ntp package to generic-armv5te core-image-basic by adding
>>>
>>> IMAGE_INSTALL_append = " chkconfig ntp"
>>>
>>> to my Yocto/ELDK conf/local.conf.
>>>
>>> bitbake failed because no recipe provides 'ntp'.
>>>
>>
>> That is right - Yocto / ELDK do not include a receipe for NTP, but the
>> OE receipe can be easy added.
>>
>>> I saw chkconfig and ntp in the list of ELDK target packages at http://www.denx.de/wiki/view/DULG/ELDKPackages#Section_3.9.2.
>>
>> The list is related to the old ELDK-4.x, see the ancient gcc versions.
>> All packages are obsolete nowadays. And yes, ELDK-4.x had a rpm package
>> for NTP.
>>
>>> I thought there might be a chance that Yocto/ELDK had support for building both. No?
>>>
>>> What is the recommended method in Yocto/ELDK to synchronize with an NTP server or other time reference?
>>
>> NTP or SNTP is IMHO always the first choice.
>
> I determined that the standard NTP package was superior to the other choice (can't remember) when I worked with uClinux. But, i have to say, some of the code was a bit sloppy, at least the command-line tools. I had trouble with stack overflows/crashes on an MMU-less uClinux system.
>
> I do not know what SNTP is. I'll try searching the web for it. What is your opinion of the two?
>
>> Check the receipe here:
>> https://github.com/openembedded/meta-oe/tree/master/meta-networking/recipes-support/ntp
>>
>
> I found a gumstix-yocto copy of the meta-oe recipe and then the original OE version. I could not figure out how to download just the ntp branch from the git browser view. The checkout procedure for the OE git tree was different from a "git clone" -- it used yet another repository tool. Is there an easier way to grab this stuff?
>
> *** I just browsed again and found this page: https://github.com/openembedded/meta-oe.git. It looks like I can obtain a zip download of the meta-oe branch. I'll give that a try and post an update. ***
>
>> You can add it flawlessly to your ELDK environment.
>
> I was going to stick the ntp branch under meta-eldk/recipes-support. I hoped after that bitbake would find the recipe for ntp automatically. Is that true? Or, do I have to either 1) place the ntp folder somewhere else, or 2) do something different than IMAGE_INSTALL_append = " chkconfig ntp"?
>
> If I am successful to download all of meta-oe, should I merge that with the ELDK git, e.g., at the same place in the ELDK tree as meta-eldk? Or, should I only do that with the ftp folder? I don't want to ask for trouble. I don't quite understand yet how recipes are located/overloaded. And, like all languages/systems with inheritance, you are stuck with tracking down all the ancestral behaviors and context.
>
The ZIP download worked fine. The ntp branch is not under meta-oe now, but under meta-networking:
meta-oe-master/meta-networking/recipes-support/ntp
Where should I graft the ntp branch on to the ELDK git tree?
Larry Baker
US Geological Survey
650-329-5608
baker at usgs.gov
>> Best regards,
>> Stefano Babic
>>
>> --
>> =====================================================================
>> DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
>> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
>> Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
>> =====================================================================
>
>
> Thank you for your help.
>
> Larry Baker
> US Geological Survey
> 650-329-5608
> baker at usgs.gov
>
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