[Insight-developers] Forgetting to include ITK_USE_FILE in project CMakeLists.txt causes all file IO to fail?

[Bradley Lowekamp]

Kent,

I don't think a segfault is an intended behavior.

When is the tag you are using ITK from to test this?

I encountered this when I was working on the ObjectFactory 2 weeks ago, and I I fixed it for my case.

I actually did a find_package only for the IO module, and included the ${ITK_USE_FILE},  but no IO modules got registered. And a segfault happened.

May be only similar, yet different.

Brad

On Nov 29, 2012, at 3:07 PM, "Williams, Norman K" <norman-k-williams at uiowa.edu> wrote:

> I ran into this working through this bug:
> https://itk.icts.uiowa.edu/jira/browse/ITK-2859
> 
> Turns out Micah Chambers was right; it segfaults.  I finally figured out
> what the problem was: he does this:
> 
> find_package(ITK REQUIRED)
> if(NOT ITK_FOUND)
>  message(FATAL_ERROR "Cannot build without ITK. Please set ITK_DIR.")
> endif(NOT ITK_FOUND)
> 
> without doing this:
> 
> 
> include(${ITK_USE_FILE})
> 
> This is kind of baffling to me, but there's a lot of crazy computer
> science-y thingies going on under the covers with how the CMake
> configuration works.
> 
> I will say this: It's kind of scary that the find_package succeeds, and
> the compilation and linking works without complaint, but without the
> UseITK.cmake the program craps itself if it tries to read or write a file.
> 
> Is this an intended behavior?  Is there a way that CMake could be forced
> to either do the work of UseITK.cmake, or complain if it isn't included?
> 
> 
> 
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