[Insight-developers] In-source build : gdcm

[David Cole]

If by "CPack does not support in-source builds" you mean "it's impossible
for CPack to distinguish your source tree from your build tree" then yes,
CPack does not presently "support" in-source builds.

However:
CPack builds a binary package just fine, regardless of whether it is an
in-source build or not.

And as noted in the bug, CPack may even build a source package just fine, if
the "in-source" "/build/" directory is excluded
using CPACK_SOURCE_IGNORE_FILES.

Even so, I discourage the use of in-source builds, and I would go so far as
to say that they should simply be disallowed. There's no reason that anybody
anywhere ever needs to build in-source. I would be happy if CMake explicitly
disallowed it, and nobody could even produce a build tree in-source...

Spending time supporting in-source builds is simply a waste of valuable time
that could be used elsewhere for something actually worthwhile.


2 cents,
David C.


On Thu, Oct 14, 2010 at 4:50 AM, Mathieu Malaterre <
mathieu.malaterre at gmail.com> wrote:

> CPack does not support in-source builds:
>
> http://www.cmake.org/Bug/bug_view_page.php?bug_id=6560
>
> But I can remove the warning, if you believe this is the right thing to do.
>
> Thanks,
>
> On Wed, Oct 13, 2010 at 11:54 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
> >
> >
>
>
>
> --
> Mathieu
>
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