[CMake] Multiple versions of ITK in one build?

[Bill Lorensen]

You could use cmake's superbuild facility to build both itk3 and itk4 in a
superbuild tree.



On Tue, May 28, 2013 at 11:02 AM, John Drescher <drescherjm at gmail.com>wrote:

> On Tue, May 28, 2013 at 10:16 AM, Zamir Khan <zamir.khan at gmail.com> wrote:
> > We have a project where multiple modules rely on ITK. Most modules have
> been
> > upgraded to ITK 4.31, but one still relies on ITK 3.20 and it would take
> a
> > significant effort to upgrade it. In the meantime, is there a way for us
> to
> > keep these modules under a single top-level CMake and have them use their
> > respective versions of ITK?
> >
> > We thought we could just try to overwrite the ITK_DIR variable in the
> > appropriate place, but our first naive implementation of this did not
> work.
> >
> > Just wondering if someone has done this and whether it is possible
> (before
> > we dive deeper).
> >
>
> On windows I have several completely separate build trees with their
> own environment. This way I can build for different compiler versions,
> 32/64 bit and different versions of libraries like this. Inside the
> root of each build tree there is a link to the appropriate Visual
> Studio command prompt that has its default folder set to the build
> tree root. Also in the root there is a batch file that sets quite a
> few _DIR environment variables to help cmake find the correct compiled
> libraries. This has worked well for the 5 or so years that I have done
> it this way. I do not use INSTALL targets so none of the binaries end
> up in Program Files.
>
> John
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