Migration issue

[Adam Dershowitz]

I just tried what you suggested for py27-numpy and it just activated without any error.  
So, myports.txt has 
  py27-numpy @1.11.3_0+gfortran (active) platform='darwin 15' archs='x86_64'

And, after the migration it had installed both that and the +universal variant.  
Yet, when I tried to activate the non-universal version it did it without complaint.  So, I really don’t understand why the +universal got built at all.
Any suggestions?

--Adam



> On Jan 5, 2017, at 10:05 AM, Russell Jones <russell.jones at physics.ox.ac.uk> wrote:
> 
> You could try activating the non +universal version to get a dependency error. Then do the same for the dependency, and so on back to the first port built +universal.
> 
> Russell
> 
> On 05/01/17 14:56, Adam Dershowitz wrote:
>> 
>> 
>>> On Jan 5, 2017, at 9:44 AM, Rainer Müller < <mailto:raimue at macports.org>raimue at macports.org <mailto:raimue at macports.org>> wrote:
>>> 
>>> On 2017-01-05 14:51, Adam Dershowitz wrote:
>>>> 
>>>> 
>>>>> On Jan 4, 2017, at 10:02 PM, Ryan Schmidt <ryandesign at macports.org <mailto:ryandesign at macports.org>> wrote:
>>>>> 
>>>>> On Jan 4, 2017, at 07:52, Adam Dershowitz wrote:
>>>>> 
>>>>>> So, yes it seems that the on the new machine I ended up with gcc6 being universal, so then cctools, ld64-latest, llvm-3.9 etc are all universal.  But, the strange thing is that gcc6 has no dependents, and I didn’t explicitly install it.  So, I’m not sure what caused it to be installed.  And, on the new machine it, and the chain down, installed +universal, while on the older machine it installed the default variant.  Both computers installed gcc6 6.2.0_2.  
>>>>>> So, my academic question is why did this happen?  And, the related questions are what port would have installed gcc6? Since I see this:
>>>>>> $port dependents gcc6
>>>>>> gcc6 has no dependents.
>>>>> 
>>>>> I don't know. If you don't need gcc6, don't install it / uninstall it.
>>>> 
>>>> It appears that build dependencies don’t show up with the dependencies command?  So, some installed port might have required gcc6 to install, but doesn’t need it for runtime.  
>>> 
>>> Try with this:
>>> 
>>>  port echo depends_build:gcc6 and installed
>>> 
>>> This is only using the information from the latest ports tree, but could
>>> probably answer your question.
>>> 
>>> Rainer
>> 
>> Thanks that helps.  It is a step in the right direction, but still leaves my question about what generates all the extra universal builds on the new machine, when the old machine had mostly default.
>> For example, on the new machine the above shows that py27-numpy has two installs, with the active one being +universal.  So, the migrate script first installed it default, then due to yet another port, must have rebuilt it +universal.  But, I don’t know how to trace those back to the root of it.  
>> Perhaps the least effort would be to remove +universal completely from myports.txt then uninstall everything, and then reinstall with the migrate script?  Would anything that needs to be universal then end up getting put back that way?  
> 

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