[Insight-users] Re: Compiling error with ITK 3.4.0 on my MinGW platform

[Ali -]

Luis,

I remember trying to compile the demons registration example under MinGW and static-linking it to ITK - I think the exe file was something about 4 MB or so. Regardless of everything else, just think of the process in this way: the linker has to 'generate' a big binary file for static linking (a few MB) comparing to the shared linking version (of the order of 0.1 MB). This binary 'generation' is a slow one which you may not feel when compiling the shared-lib ITK once and linking against it many times. But it becomes a pain when you have to static-link your exe many times.

I did not do any profiling on this, but try the demons registration example, qualitatively, it felt like the linking time linearly increased with the output binary size.

> 
> 
> Hi Ali,
> 
> > 
> > Even if there were no eroors, ITK under MinGW is not really useful
> > right now, ITK is a big template-basd library and static-linking it
> > to your binary will be a slow-long process.
> 
> 
> 
> I'm not quite sure the statement above makes sense.
> 
> 
> 1) Yes, ITK is an almost fully templated library
> 
> 2) Whether you build it as shared or static library,
>     a very small fraction of the code goes into that library
> 
> 3) Most of the code of ITK is actually compiled when you
>     compile your application, not when you build ITK.
> 
> 
> The difference between using static or shared when building
> ITK libraries, make that the linking time of your application
> will change by a small fraction. Linking is in itself a small
> fraction of the build time compared to compilation itself.
> 
> 
> 
>     Regards,
> 
> 
>        Luis
> 
> 
> 
> --------------
> Ali - wrote:
> > Thomas,
> > 
> > ITK could be compiled on MinGW only as a static library -- when the 
> > shared-lib flag was on there were linking errors. There were attempts to 
> > solve these issue just before the 3.4 release, but it didn't get 
> > anywhere. The errors that you reported could be some side effects of 
> > those attempts.
> > 
> > Even if there were no eroors, ITK under MinGW is not really useful right 
> > now, ITK is a big template-basd library and static-linking it to your 
> > binary will be a slow-long process.
> > 
> > 
> > Hi ITK users
> > 
> > Between ITK v 3.2.0 and v 3.4.0, the file
> > ITK/Utilities/itkjpeg/jconfig.h.in had been modified in the line 24.
> > In 3.2.0 version the line was :
> >              #if defined (_WIN32) && !(defined(__CYGWIN__) ||
> > defined(__MINGW32__))
> > In 3.4.0 version the line is :
> >              #if defined (_WIN32) && !defined(__CYGWIN__)
> > 
> > On my MinGW platform, the ITK 3.2.0 compiling with success.
> > But the new version 3.4.0 generate this compiling error :
> > [  5%] Building C object
> > Utilities/itktiff/CMakeFiles/itktiff.dir/tif_jpeg.obj
> > In file included from
> > G:/OTB-DART-NIGHTLY/sources/InsightToolkit-3.4.0/Utilities/itktiff/tif_jpeg.c:74: 
> > 
> > G:/OTB-DART-NIGHTLY/nightly/mingw/outils/binaries/static/debug/itk-3.4.0-MinGW/Utilities/itkjpeg/8/jpeglib.h:99: 
> > 
> > parse error before "boolean"
> > G:/OTB-DART-NIGHTLY/nightly/mingw/outils/binaries/static/debug/itk-3.4.0-MinGW/Utilities/itkjpeg/8/jpeglib.h:115: 
> > 
> > parse error before "boolean"
> > G:/OTB-DART-NIGHTLY/nightly/mingw/outils/binaries/static/debug/itk-3.4.0-MinGW/Utilities/itkjpeg/8/jpeglib.h:167: 
> > 
> > parse error before "boolean"
> > G:/OTB-DART-NIGHTLY/nightly/mingw/outils/binaries/static/debug/itk-3.4.0-MinGW/Utilities/itkjpeg/8/jpeglib.h:182: 
> > 
> > parse error before '*' token
> > :
> > :
> > (with CMake v 2.4.6)
> > 
> > Could you help me, How can I solve my problem ?
> > 
> > Thanks,
> > Thomas
> > 
> > ------------------------------------------------------------------------
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> > 
> > 
> > ------------------------------------------------------------------------
> > 
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