* what means PROV_class-native = ""?
@ 2013-01-18 21:35 Robert P. J. Day
2013-01-18 21:45 ` Martin Jansa
0 siblings, 1 reply; 4+ messages in thread
From: Robert P. J. Day @ 2013-01-18 21:35 UTC (permalink / raw)
To: OE Core mailing list
perusing oe-core for examples to demonstrate the concept of
"PROVIDES =", and i ran across this in recipes-devtools/dpkg/dpkg.inc:
PROV = "virtual/update-alternatives"
PROV_class-native = ""
PROVIDES += "${PROV}"
i'm not sure what to make of that -- what's the purpose of assigning
to PROV, then subsequently assigning to PROVIDES, but with that
PROV_class-native = ""
line in between? i did a grep and saw nothing else like it throughout
oe-core.
rday
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
========================================================================
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: what means PROV_class-native = ""?
2013-01-18 21:35 what means PROV_class-native = ""? Robert P. J. Day
@ 2013-01-18 21:45 ` Martin Jansa
2013-01-18 21:57 ` Saul Wold
0 siblings, 1 reply; 4+ messages in thread
From: Martin Jansa @ 2013-01-18 21:45 UTC (permalink / raw)
To: Robert P. J. Day; +Cc: OE Core mailing list
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On Fri, Jan 18, 2013 at 04:35:34PM -0500, Robert P. J. Day wrote:
>
> perusing oe-core for examples to demonstrate the concept of
> "PROVIDES =", and i ran across this in recipes-devtools/dpkg/dpkg.inc:
>
> PROV = "virtual/update-alternatives"
> PROV_class-native = ""
PROV is variable with no special meaning
class-native is standard override for native recipe (like
virtclass-native was before).
> PROVIDES += "${PROV}"
>
> i'm not sure what to make of that -- what's the purpose of assigning
> to PROV, then subsequently assigning to PROVIDES, but with that
>
> PROV_class-native = ""
>
> line in between? i did a grep and saw nothing else like it throughout
> oe-core.
>
> rday
>
> --
>
> ========================================================================
> Robert P. J. Day Ottawa, Ontario, CANADA
> http://crashcourse.ca
>
> Twitter: http://twitter.com/rpjday
> LinkedIn: http://ca.linkedin.com/in/rpjday
> ========================================================================
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
--
Martin 'JaMa' Jansa jabber: Martin.Jansa@gmail.com
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: what means PROV_class-native = ""?
2013-01-18 21:45 ` Martin Jansa
@ 2013-01-18 21:57 ` Saul Wold
2013-01-18 22:06 ` Robert P. J. Day
0 siblings, 1 reply; 4+ messages in thread
From: Saul Wold @ 2013-01-18 21:57 UTC (permalink / raw)
To: Robert P. J. Day; +Cc: Martin Jansa, OE Core mailing list
On 01/18/2013 01:45 PM, Martin Jansa wrote:
> On Fri, Jan 18, 2013 at 04:35:34PM -0500, Robert P. J. Day wrote:
>>
>> perusing oe-core for examples to demonstrate the concept of
>> "PROVIDES =", and i ran across this in recipes-devtools/dpkg/dpkg.inc:
>>
>> PROV = "virtual/update-alternatives"
>> PROV_class-native = ""
>
> PROV is variable with no special meaning
> class-native is standard override for native recipe (like
> virtclass-native was before).
>
>> PROVIDES += "${PROV}"
>>
>> i'm not sure what to make of that -- what's the purpose of assigning
>> to PROV, then subsequently assigning to PROVIDES, but with that
>>
>> PROV_class-native = ""
>>
>> line in between? i did a grep and saw nothing else like it throughout
>> oe-core.
>>
I believe that idea is since it's PROVIDES += , not a straight
assignment like = it's not a simple to override with the +=, so for the
target case PROVIDE the virtual/u-a, but not for the native case of that
package.
If it was a straight assignment (using =) the ${PROV} would not be needed.
Sau!
>> rday
>>
>> --
>>
>> ========================================================================
>> Robert P. J. Day Ottawa, Ontario, CANADA
>> http://crashcourse.ca
>>
>> Twitter: http://twitter.com/rpjday
>> LinkedIn: http://ca.linkedin.com/in/rpjday
>> ========================================================================
>>
>> _______________________________________________
>> Openembedded-core mailing list
>> Openembedded-core@lists.openembedded.org
>> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
>
>
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: what means PROV_class-native = ""?
2013-01-18 21:57 ` Saul Wold
@ 2013-01-18 22:06 ` Robert P. J. Day
0 siblings, 0 replies; 4+ messages in thread
From: Robert P. J. Day @ 2013-01-18 22:06 UTC (permalink / raw)
To: Saul Wold; +Cc: Martin Jansa, OE Core mailing list
On Fri, 18 Jan 2013, Saul Wold wrote:
> On 01/18/2013 01:45 PM, Martin Jansa wrote:
> > On Fri, Jan 18, 2013 at 04:35:34PM -0500, Robert P. J. Day wrote:
> > >
> > > perusing oe-core for examples to demonstrate the concept of
> > > "PROVIDES =", and i ran across this in recipes-devtools/dpkg/dpkg.inc:
> > >
> > > PROV = "virtual/update-alternatives"
> > > PROV_class-native = ""
> >
> > PROV is variable with no special meaning
> > class-native is standard override for native recipe (like
> > virtclass-native was before).
> >
> > > PROVIDES += "${PROV}"
> > >
> > > i'm not sure what to make of that -- what's the purpose of assigning
> > > to PROV, then subsequently assigning to PROVIDES, but with that
> > >
> > > PROV_class-native = ""
> > >
> > > line in between? i did a grep and saw nothing else like it throughout
> > > oe-core.
> > >
> I believe that idea is since it's PROVIDES += , not a straight
> assignment like = it's not a simple to override with the +=, so for
> the target case PROVIDE the virtual/u-a, but not for the native case
> of that package.
>
> If it was a straight assignment (using =) the ${PROV} would not be
> needed.
i thought it was something like that, i just wanted to make sure.
as martin pointed out, there's nothing magical about the PROV
variable, so i could just as easily have used, say, RDAY instead of
PROV as it was purely temporary, right?
rday
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
========================================================================
^ permalink raw reply [flat|nested] 4+ messages in thread
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2013-01-18 21:35 what means PROV_class-native = ""? Robert P. J. Day
2013-01-18 21:45 ` Martin Jansa
2013-01-18 21:57 ` Saul Wold
2013-01-18 22:06 ` Robert P. J. Day
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