confusion in base regarding [option os.arch] and ${os.arch}

[Jeremy Lavergne]

>> reading through base, it looks like os.arch is set to something  
>> based   on
>> its original value, while that original value is actually used as
>> os_platform (and os.platform). if this is the case, those changes  
>> were
>> never ported into port[un]archive.tcl. i don't understand how to
>> reference platform correctly from there, as it seems that the  
>> values   are
>> different when they're pulled from [option os.arch] versus $
>> {os.arch}
>>
>> any care to shed light on this for a newbie tcl'er?
>>
>> what i essentially want to do is change archive.fulldestpath from    
>> [file
>> join ${archive.destpath} [option os.platform] [option os.arch]]    
>> to [file
>> join ${archive.destpath} [option os.platform] ${os.arch}]   where  
>> os.arch
>> is x86_64 or what have you, instead of option os.arch's   i386
>>
>> if i understood the transforms in portmain.tcl then that's what  
>> should
>> be done here. incidentally, after this one change we can actually do
>> binary distribution via archivemode
>
> I would think ${os.arch} and [option os.arch] refer to the same  
> variable, and that the syntax difference relates to where in the  
> code you're accessing it from.
>
> When does os.arch seem to be x86_64? As far as I can tell, the only  
> possible values for os.arch should be "i386" and "powerpc". I  
> recently corrected this in the Guide:
>
> http://guide.macports.org/#reference.variables
>
> Perhaps you're thinking of configure.build_arch which could be  
> "i386", "x86_64", "ppc" or "ppc64"?

Seems I was confused.

Does anyone care to check my changes?  This patch enables the use of  
build_arch for the portarchive mode naming schemes.  This includes the  
directory and the portion of the archive name involving the arch.

It works for me, but I only have an x86_64 to test on.

Thanks

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