[oe] (no subject)

Fri Jul 27 16:47:39 UTC 2018

On Friday, July 27, 2018 12:42:44 PM EDT William Delacre wrote:
> Alright, thabks !
> 
> And I guess if it’s a tool I need during runtime on the target, I add it in
> the RDPENDS variable ?

Correct.

Note as well that I did make a note of why the -native version of incremental 
was needed, to work around a circular dependency, as captured in the commit 
log.

In general with python we definitely make assumptions around arch independence 
and the strategy has survived most if not all we have thrown at it.

Mark

> 
> Le ven. 27 juil. 2018 à 18:40, S. Lockwood-Childs <sjl at vctlabs.com> a
> 
> écrit :
> > It depends on the role of the particular dependency:
> > 
> > * tool you need to run during build             <-- native dependency
> > * library you need to link against during build <-- target dependency
> > 
> > --SJLC
> > 
> > On Fri, Jul 27, 2018 at 06:25:27PM +0200, William Delacre wrote:
> > > Okay, it makes sense!
> > > 
> > > My question may seem stupid but then why don’t we always use ‘-native’
> > 
> > for
> > 
> > > the dependencies ?
> > > 
> > > Is it because sometimes we know that the behavior of ‘foo’ and
> > 
> > ‘foo-native’
> > 
> > > would be the same, independently of the architecture ?
> > > 
> > > William
> > > 
> > > Le ven. 27 juil. 2018 à 18:16, Mark Asselstine <
> > > 
> > > mark.asselstine at windriver.com> a écrit :
> > > > On Friday, July 27, 2018 12:04:37 PM EDT William Delacre wrote:
> > > > > Thanks a lot for the answer, it worked perfectly !
> > > > > 
> > > > > There is just one point I don’t really understand : why do we need
> > > > > to
> > > > 
> > > > add a
> > > > 
> > > > > dependency to ‘python-incremental-NATIVE’ ?
> > > > > 
> > > > > What would happen if I just add to the python-twisted recipe :
> > > > > 
> > > > > DEPENDS += “${PYTHON_PN}-incremental“
> > > > 
> > > > This would assume that python is completely arch independent, which it
> > 
> > is
> > 
> > > > not.
> > > > Assume for example python-incremental had some C extensions, using
> > 
> > DEPENDS
> > 
> > > > would build them for the target arch yet possibly attempt to run them
> > 
> > on
> > 
> > > > your
> > > > build host. -native takes care of this.
> > > > 
> > > > Some may say this is a bit of a hack since the difference in ARCH
> > 
> > *might*
> > 
> > > > equate to a difference in behavior. But I have dealt with many python
> > > > recipes
> > > > and have yet to run into any scenario where this potential issue
> > 
> > exists.
> > 
> > > > At least that is what I can recall at the moment. Unfortunately I have
> > > > forgotten some of the subtleties that might be in play.
> > > > 
> > > > Mark
> > > > 
> > > > > William
> > > > > 
> > > > > Le ven. 27 juil. 2018 à 17:03, Mark Asselstine <
> > > > > 
> > > > > mark.asselstine at windriver.com> a écrit :
> > > > > > On Thu, Jul 26, 2018 at 3:40 PM, Mark Asselstine
> > > > > > 
> > > > > > <mark.asselstine at windriver.com> wrote:
> > > > > > > On Mon, Jul 23, 2018 at 8:28 AM, William Delacre
> > > > > > > 
> > > > > > > <williamdelacre at gmail.com> wrote:
> > > > > > >> Hi ! :-)
> > > > > > >> 
> > > > > > >> I’m facing issues when trying to run ‘bitbake python-twisted’
> > > > > > 
> > > > > > (do_compile
> > > > > > 
> > > > > > >> error)
> > > > > > >> 
> > > > > > >> Log says :
> > > > 
> > > > > > >> “Download error on https://pypi.python.org/simple/incremental/:
> > > > [Errno
> > > > 
> > > > > > -3]
> > > > > > 
> > > > > > >> Temporary failure in name resolution
> > > > > > 
> > > > > > With the additional info you sent me along with a second look at
> > 
> > the
> > 
> > > > > > error I can fairly confidently say I know what the issue is.
> > > > > > 
> > > > > > Python, like some other languages (ruby, go...) will attempt to
> > > > > > download dependencies/requirements if they are not present. This
> > > > > > is
> > > > > > done "outside" of the bitbake system and thus will ignore
> > > > > > BB_NO_NETWORK and is generally a bad thing. It isn't quite host
> > > > > > contamination but it is very similar. What we do with our python
> > > > > > recipes in bitbake is review a python package's source setup.py,
> > > > > > requirements.txt...files in order to determine what other python
> > > > > > packages are needed, add them as RDEPENDS or similar in order to
> > 
> > avoid
> > 
> > > > > > the python attempting to complete a download such as this.
> > > > > > 
> > > > > > In this case python-twisted 'requires' python-incremental but the
> > > > > > Rocko version of the python-twisted recipe lacks the needed
> > 
> > assignment
> > 
> > > > > > to ensure this is available in the recipe sysroot and thus the
> > > > > > attempted download.
> > > > > > 
> > > > > > Cherry pick commit b08b570c8624303acbb6bb064a7bda466a679df4
> > > > > > [python-twisted: avoid downloading build dependencies] to Rocko
> > > > > > and
> > > > > > you will be good to go. You should also follow up this thread with
> > 
> > a
> > 
> > > > > > request to have this commit put onto Rocko to avoid others hitting
> > 
> > the
> > 
> > > > > > same issue.
> > > > > > 
> > > > > > Mark
> > > > > > 
> > > > > > >> ............
> > > > > > >> 
> > > > > > >> distutils.errors.DistutilsError : Could not find suitable
> > > > 
> > > > distribution
> > > > 
> > > > > > for
> > > > > > 
> > > > > > >> Requirement.parse(‘incremental>=16.10.1’)”
> > > > > > >> 
> > > > > > >> First of all I’m not connected to internet, so I’ve
> > 
> > pre-downloaded
> > 
> > > > all
> > > > 
> > > > > > the
> > > > > > 
> > > > > > >> required packages (twisted-17.9.0.tar.bz2 &
> > > > 
> > > > incremental-17.5.0.tar.gz
> > > > 
> > > > > > are
> > > > > > 
> > > > > > >> present in my build/downloads folder)
> > > > > > >> 
> > > > > > >> It’s the first time I have some “downloading issues” and I’m
> > 
> > stuck
> > 
> > > > on
> > > > 
> > > > > > >> it
> > > > > > >> for a few hours now..
> > > > > > >> 
> > > > > > >> Any tips for me ?
> > > > > > > 
> > > > > > > Check all aspects of what you have manually downloaded and
> > 
> > populated
> > 
> > > > > > > in your downloads. My guess is that a checksum or some other
> > 
> > detail
> > 
> > > > > > > isn't matching and it is rejecting what you have and thus
> > 
> > attempting
> > 
> > > > > > > to re-download the file.
> > > > > > > 
> > > > > > > Mark
> > > > > > > 
> > > > > > >> Thanks in advance !
> > > > > > >> --
> > > > > > >> _______________________________________________
> > > > > > >> Openembedded-devel mailing list
> > > > > > >> Openembedded-devel at lists.openembedded.org
> > 
> > http://lists.openembedded.org/mailman/listinfo/openembedded-devel
> > 
> > > --
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