[Insight-developers] In-source build : gdcm

[Bill Lorensen]

Maybe we should block in-source builds for ITK. When are they ever recommended?

New users often make the mistake that is, as Kent pointed, a pain to
recover from if you are a newbie.


On Thu, Oct 14, 2010 at 11:32 AM, David Cole <david.cole at kitware.com> wrote:
> Everyone who has ever accidentally done an in-source build has noticed this.
> It's the main reason why I so strongly discourage ever building in-source.
>
> It's fine as long as you don't have any locally modified source files, but
> if you do, then it's a real pain to recover from.
>
> I just hate hearing about premature greying. No fun.
> Avoid premature greying: do out-of-source builds!
>
> :-)
> David C.
>
> On Thu, Oct 14, 2010 at 10:25 AM, kent williams
> <norman-k-williams at uiowa.edu> wrote:
>>
>> I don’t know if anyone else has noticed this, but this CMake quirk has
>> caused premature greying amongst some of our RAs:
>>
>> If you accidentally configure for an In-source build, and then try and use
>> the same source tree for an out-of-source build, it will appear to configure
>> correctly, but the out of source build tree is un-buildable.  CMake still
>> wants you to build in-source.
>>
>> You have to either kill your source tree and check it out again, or
>> manually remove all the ‘CMake droppings’ in your source tree, which are
>> considerable in number, and rather obscure if you’re not a grizzled CMake
>> veteran.
>>
>>
>> On 10/13/10 4:54 PM, "Luis Ibanez" <luis.ibanez at kitware.com> wrote:
>>
>>
>> Hi Mathieu,
>>
>> CPack supports in-source builds.
>>
>> The warning is probably unnecessary.
>>
>>
>> However, we have to setup a Nightly
>> build that tests the Installation of ITK.
>> (that's in my plate...)
>>
>>
>>     Luis
>>
>>
>> -----------------------------------------------------------
>> On Mon, Oct 11, 2010 at 8:06 AM, Mathieu Malaterre
>> <mathieu.malaterre at gmail.com> wrote:
>>
>> On Mon, Oct 11, 2010 at 2:06 AM, Luis Ibanez <luis.ibanez at kitware.com>
>> wrote:
>> >
>> > Hi Mathieu,
>> >
>> > I know that we encourage users to do out-of-source builds,
>> > but was not aware that we are now precluding users from
>> > making in-source builds:
>> >
>> >> cd ITK
>> >> cmake .
>> >
>> >
>> > Make Error at Utilities/gdcm/CMakeLists.txt:34 (MESSAGE):
>> >   GDCM requires an out of source Build.  Please create a separate binary
>> >   directory and run CMake there.
>> >
>> >
>> > -- Configuring incomplete, errors occurred!
>> >
>> >
>> > -----------------------
>> >
>> >
>> > Is there a deep technical reason for this change ?
>>
>> CPack does not support in-source built AFAIK. I'll change the error to
>> a warning.
>>
>> Thanks for the report.
>> --
>> Mathieu
>>
>>
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>
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>
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