how does SCR_URI_OVERRIDES_PACKAGE_ARCH affect building tslib?

how does SCR_URI_OVERRIDES_PACKAGE_ARCH affect building tslib?

[Robert P. J. Day]

  looking at SRC_URI_OVERRIDES_PACKAGE_ARCH variable, and i notice
first that there is only one usage of it in all of oe-core (tslib),
but i'm confused as to what value it has.

  the ref manual reads:

"By default, the OpenEmbedded build system automatically detects
whether SRC_URI contains files that are machine-specific. If so, the
build system automatically changes PACKAGE_ARCH. Setting this variable
to "0" disables this behavior."

  first, i'm not sure what about the tslib SRC_URI appears to be
machine-specific. also, just for fun, i commented out that line in the
tslib .bb file, and did a global "bb show" to see what difference it
made, and i saw no difference at all. so what exactly is the purpose
of that line in that recipe? what difference should i be able to see
with versus without it? thanks.

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================

Re: how does SCR_URI_OVERRIDES_PACKAGE_ARCH affect building tslib?

[Christopher Larson]

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On Fri, Aug 8, 2014 at 3:35 AM, Robert P. J. Day <rpjday@crashcourse.ca>
wrote:

>
>   looking at SRC_URI_OVERRIDES_PACKAGE_ARCH variable, and i notice
> first that there is only one usage of it in all of oe-core (tslib),
> but i'm confused as to what value it has.
>
>   the ref manual reads:
>
> "By default, the OpenEmbedded build system automatically detects
> whether SRC_URI contains files that are machine-specific. If so, the
> build system automatically changes PACKAGE_ARCH. Setting this variable
> to "0" disables this behavior."
>
>   first, i'm not sure what about the tslib SRC_URI appears to be
> machine-specific. also, just for fun, i commented out that line in the
> tslib .bb file, and did a global "bb show" to see what difference it
> made, and i saw no difference at all. so what exactly is the purpose
> of that line in that recipe? what difference should i be able to see
> with versus without it? thanks.


Any file:// file in an SRC_URI can become machine specific if placed in a
machine subdir in the search path. That said, I don't know why the
automatic behavior of setting package_arch in that case is something that
needs to be disabled for tslib. I'd suggest using git-blame to examine the
commits which added this variable.
-- 
Christopher Larson
clarson at kergoth dot com
Founder - BitBake, OpenEmbedded, OpenZaurus
Maintainer - Tslib
Senior Software Engineer, Mentor Graphics

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Re: how does SCR_URI_OVERRIDES_PACKAGE_ARCH affect building tslib?

[Robert P. J. Day]

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On Fri, 8 Aug 2014, Christopher Larson wrote:

>
> On Fri, Aug 8, 2014 at 3:35 AM, Robert P. J. Day <rpjday@crashcourse.ca> wrote:
>
>   looking at SRC_URI_OVERRIDES_PACKAGE_ARCH variable, and i notice
> first that there is only one usage of it in all of oe-core (tslib),
> but i'm confused as to what value it has.
>
>   the ref manual reads:
>
> "By default, the OpenEmbedded build system automatically detects
> whether SRC_URI contains files that are machine-specific. If so, the
> build system automatically changes PACKAGE_ARCH. Setting this variable
> to "0" disables this behavior."
>
>   first, i'm not sure what about the tslib SRC_URI appears to be
> machine-specific. also, just for fun, i commented out that line in the
> tslib .bb file, and did a global "bb show" to see what difference it
> made, and i saw no difference at all. so what exactly is the purpose
> of that line in that recipe? what difference should i be able to see
> with versus without it? thanks.
>
> Any file:// file in an SRC_URI can become machine specific if placed
> in a machine subdir in the search path. That said, I don't know why
> the automatic behavior of setting package_arch in that case is
> something that needs to be disabled for tslib. I'd suggest using
> git-blame to examine the commits which added this variable.

  should have done that first thing ... "git blame" shows that line
goes all the way back to 2006, when tslib *did* have machine-specific
files under tslib/. now that that's no longer true, i suspect that
line can be tossed.

  pity ... i was just looking for a single recipe that used
SRC_URI_OVERRIDES_PACKAGE_ARCH, and now i have none. i haz a sad.

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================