[Insight-developers] In-source build : gdcm

[kent williams]

I don¹t 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 ŒCMake droppings¹ in your source tree, which are considerable
in number, and rather obscure if you¹re 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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