[CMake] PARENT_SCOPE for unset()?

[David Cole]

Yes, PARENT_SCOPE must occur as the last argument. Each command has its own
code for processing its argument list. See Source/cmSetCommand.cxx for
details on this one.

Interesting (not quite the right adjective?) side effect: it's difficult to
set a variable to the value "PARENT_SCOPE" because you have to do it
indirectly...


On Thu, Feb 9, 2012 at 7:12 PM, Robert Dailey <rcdailey at gmail.com> wrote:

> That worked, thanks David.
>
> I guess CMake goes right-to-left for function parameters? I don't see how
> else it doesn't think PARENT_SCOPE is a value instead of an option.
>
> ---------
> Robert Dailey
>
>
>
> On Thu, Feb 9, 2012 at 1:45 PM, David Cole <david.cole at kitware.com> wrote:
>
>> On Thu, Feb 9, 2012 at 2:41 PM, Robert Dailey <rcdailey at gmail.com> wrote:
>>
>>> I didn't try that because I thought it would actually treat PARENT_SCOPE
>>> as a string and add it to the variable. I did this instead:
>>>
>>> set( var "" PARENT_SCOPE )
>>>
>>
>> That leaves it set, with a value of the empty string, in the parent
>> scope. Give the one I sent a try.
>>
>>
>>
>>>
>>> ---------
>>> Robert Dailey
>>>
>>>
>>>
>>> On Thu, Feb 9, 2012 at 1:26 PM, David Cole <david.cole at kitware.com>wrote:
>>>
>>>> On Thu, Feb 9, 2012 at 2:22 PM, Alexander Neundorf <
>>>> a.neundorf-work at gmx.net> wrote:
>>>>
>>>>> On Thursday 09 February 2012, Robert Dailey wrote:
>>>>> > It would seem useful to have a PARENT_SCOPE option for the unset()
>>>>> command,
>>>>> > just like its set() counterpart. Is there a particular reason why it
>>>>> does
>>>>> > not have it now?
>>>>>
>>>>> No, I think there is not particular reason.
>>>>>
>>>>> Alex
>>>>> --
>>>>>
>>>>> Powered by www.kitware.com
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>>>>
>>>>
>>>> Does:
>>>>
>>>>   set(var PARENT_SCOPE)
>>>>
>>>> have the intended effect?
>>>>
>>>> (If so, you could use that until such time as PARENT_SCOPE is added to
>>>> unset.)
>>>>
>>>>
>>>> --
>>>>
>>>> Powered by www.kitware.com
>>>>
>>>> Visit other Kitware open-source projects at
>>>> http://www.kitware.com/opensource/opensource.html
>>>>
>>>> Please keep messages on-topic and check the CMake FAQ at:
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>>>
>>>
>>
>
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