Re: [Ltib] Adding new package to configuration system

[Stuart Hughes]

Hi Andrea,

You won't need PKG_TPT2000_CVS as this is just a boolean and you'll only
be in that spec if it's set true.

For PKG_TPT2000_CVS_TAG you'll need to rename it.  The reason is that
only certain names are exported in the environment automatically, this
is to reduce environmental pollution (and the possibility of a clash).

The ones automatically exported must have the style:
_PRECONFIG, _WANT_ or SYSCFG_

So I'd suggest in your case using:
PKG_TPT2000_WANT_CVS_TAG or PKG_TPT2000_CVS_TAG_PRECONFIG

Regards, Stuart

Andrea Galbusera wrote:
> Hi ltib folks,
> this is driving me crazy in the last hours. Hope it's not a silly
> question.
> 
> Following guidelines in doc/LtibFaq I added a new package to the Package
> Selection List. Here is the relevant part in
> config/userspace/packages.lkc:
> 
>> config PKG_TPT2000_CVS
>>     bool "tpt2000 software from CVS"
>>     default n
>>     help
>>     This package will include tpt2000 software as of the given CVS tag
>> into rootfs.
>>
>> config PKG_TPT2000_CVS_TAG
>>     depends PKG_TPT2000_CVS
>>     string "tpt2000 CVS tag to checkout"
>>     default "tpt_build_ng"
>>     help
>>     Put in the name of the tpt2000 CVS tag you want to build from.
> 
> Both symbols get correctly into config/platform/mpc5121tpt/.config
> 
>> $ grep PKG_TPT2000 config/platform/mpc5121tpt/.config
>> CONFIG_PKG_TPT2000_CVS=y
>> CONFIG_PKG_TPI2000_CVS_TAG="tpt_build_ng"
> 
> I'd like to use the value assigned to PKG_TPT2000_CVS_TAG in my .spec
> file to drive custom build options (in this example the CVS tag to
> checkout), but I cannot get it to work. I mean either
> PKG_TPT2000_CVS_TAG or PKG_TPT2000_CVS appear to be undefined (empty
> string) within any section of my .spec file.
> 
>> %Prep
>> echo "$PKG_TPT2000_CVS"
>> echo "$PKG_TPT2000_CVS_TAG"
> 
> By looking at other .specs I guess this can be done. I also can
> succesfully access the value of other PKG_XXX symbols from within
> my .spec.
> 
> What am I missing? How do symbols flow from configuration system
> to .spec files?
> 
> TIA
> Andrea
> 
> 
> 
> 
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