[Insight-developers] Cygwin cmake 2.6 issue

[Wes Turner]

Thanks!
- Wes

On Wed, Jun 3, 2009 at 1:22 PM, Bill Lorensen <bill.lorensen at gmail.com>wrote:

> No hurry really.
>
> On Wed, Jun 3, 2009 at 12:34 PM, Wes Turner <wes.turner at kitware.com>
> wrote:
> > Bill,
> > Brad asked me to take care of this, but I have been out since Monday
> after
> > having knee surgery.  I will be working from home the next few days and
> this
> > is something that is on my list to do.  Is there a hard deadline on this,
> or
> > is it something I can dabble at for a few days?
> > - Wes
> >
> > On Wed, Jun 3, 2009 at 8:59 AM, Brad King <brad.king at kitware.com> wrote:
> >>
> >> Bill Lorensen wrote:
> >>>
> >>> Brad,
> >>>
> >>> Also, I think the same thing may have happened to the mingw build.
> >>> http://www.cdash.org/CDash/viewBuildError.php?buildid=346391
> >>
> >> It is actually a problem affecting the GNU toolchain on windows,
> >> not just cygwin specifically.
> >>
> >>> Did some change break this compatibility? Or is this a bugu that
> >>> needed to be corrected?
> >>
> >> CMake 2.6 links to the dll's import library "libITKCommon.dll.a"
> >> instead of the dll "cygITKCommon.dll".  This is considered the
> >> proper way to link on Windows in general, and was a bug in 2.4.
> >> However, the linker works differently with the import library
> >> than with the dll in some subtle ways, which led to the problem.
> >>
> >> It was just lucky that 2.4's way worked for our case.  I would
> >> not be surprised if it would cause some subtle runtime bugs in
> >> similar cases.  The root cause is that we are trying to link
> >> a shared library to static libraries and then an executable
> >> to both that shared library and the same static libraries.
> >> Therefore the solution is to build everything shared or static
> >> but not both.
> >>
> >> -Brad
> >
> >
> >
> > --
> > Wesley D. Turner, Ph.D.
> > Kitware, Inc.
> > R&D Engineer
> > 28 Corporate Drive
> > Clifton Park, NY 12065-8662
> > Phone: 518-371-3971 x120
> >
>



-- 
Wesley D. Turner, Ph.D.
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x120
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