[Insight-users] RE: XCode 2.4 and isnan

[Hans Johnson]

Hello All,

I just wanted to add some more information.  I got similar results by
replacing the same line with :

using std::isnan;

Hans





On 8/16/06 11:30 AM, "Remo Mueller" <remo.mueller at case.edu> wrote:

> I'm currently working on MacOSX 10.4.7 with Xcode 2.4 installed, and
> I'm compiling the code using gcc version 4.0.1 (Apple Computer, Inc.
> build 5363), using CMake 2.4.3.
> 
> I ran into the same problem of isnan not being defined in
> vnl_math.cxx, which is located under Utilities/vxl/core/vnl/
> 
> I finally got ITK to compile by changing line 66 in vnl_math.cxx from:
> 
> #define isnan(x) __isnand((double)x)
> 
> to
> 
> #define isnan(x) __inline_isnand((double)x)
> 
> This line is defined in the #if defined (__APPLE__) code block.
> 
> I'm not sure if this is correct, but it seems to fix the problem.
> This problem exists in ITK 2.8.1 and the current version of CVS.  Can
> someone who's more knowledgeable about the inner workings of ITK
> verify if this fixes the original problem? Thanks
> 
> I hope this helps,
> Remo Mueller
> 
> Case Western Reserve University
> Computer Science BS/MS Program
> 
> 
> 
>> This is regarding the following build errors:
>> 
>> http://www.itk.org/Testing/Sites/eno/Darwin-Xcode2.4-rel/
>> 20060811-0100-Nightly/BuildError.html
>> 
>> Last week a new version of Xcode was release. It seems to mostly work
>> with ITK and CMake. However, there was a minor change to the isnan.
>> The internal symbol __isnand is no longer used in the isnan macro,
>> instead the marco reference __inline__isnan[fd]? inlined function is
>> used. I was not able to figure what was going on in this header file
>> and why the isnan macro would not work.
>> 
>> I also suspect that this same problem will occur with a unix make
>> file since it it a change to a system header file.
>> 
>> Thanks,
>> Brad
>> 
>> ========================================================
>> Bradley Lowekamp
>> Management Systems Designers Contractor for
>> Office of High Performance Computing and Communications
>> National Library of Medicine
>> blowekamp at mail.nih.gov
>> 
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