[ITK-dev] FFTWForwardFFTImageFilter and FFTWInverseFFTImageFilter

[Tim Jackson]

Hello,

I am currently writing a C++ program that I've called FTTC using VS2012 to
compile.  I'm having problems including the FFTW libraries, which I
downloaded v3.3.4 of the precompiled libraries for Windows, into ITK.  I
reconfigured and rebuilt ITK v4.6.1, changing the variables in CMake to
turn on ITK_USE_FFTWF and set the path for both FFTWF_LIB and
FFTWF_THREADS_LIB to the downloaded version of libfftw3-3.lib.  I also set
FFTW_INCLUDE_PATH to where all of the downloaded files for the FFTW are
located.

ITK built without a problem, but when I now compile my program that uses
the FFTWForwardFFTImageFilter and FFTWInverseFFTImageFilter, I get a whole
host of linker error messages:

fttc.obj : error LNK2019: unresolved external symbol __imp__fftwf_execute
referenced in function "protected: virtual void __thiscall
itk::FFTWInverseFFTImageFilter<class itk::Image<float,2>,class
itk::Image<float,2> >::BeforeThreadedGenerateData(void)"
(?BeforeThreadedGenerateData@?$FFTWInverseFFTImageFilter at V?$Image at M$01 at itk
@@V12@@itk@@MAEXXZ)

fttc.obj : error LNK2019: unresolved external symbol
__imp__fftwf_plan_dft_r2c referenced in function "public: static struct
fftwf_plan_s * __cdecl itk::fftw::Proxy<float>::Plan_dft_r2c(int,int const
*,float *,float (*)[2],unsigned int,int,bool)" (?Plan_dft_r2c@?$Proxy at M
@fftw at itk@@SAPAUfftwf_plan_s@@HPBHPAMPAY01MIH_N at Z)

fttc.obj : error LNK2019: unresolved external symbol
__imp__fftwf_plan_dft_c2r referenced in function "public: static struct
fftwf_plan_s * __cdecl itk::fftw::Proxy<float>::Plan_dft_c2r(int,int const
*,float (*)[2],float *,unsigned int,int,bool)" (?Plan_dft_c2r@?$Proxy at M
@fftw at itk@@SAPAUfftwf_plan_s@@HPBHPAY01MPAMIH_N at Z)

fttc.obj : error LNK2019: unresolved external symbol
__imp__fftwf_destroy_plan referenced in function "protected: virtual void
__thiscall itk::FFTWInverseFFTImageFilter<class itk::Image<float,2>,class
itk::Image<float,2> >::BeforeThreadedGenerateData(void)"
(?BeforeThreadedGenerateData@?$FFTWInverseFFTImageFilter at V?$Image at M$01 at itk
@@V12@@itk@@MAEXXZ)

fttc.obj : error LNK2019: unresolved external symbol
__imp__fftwf_plan_with_nthreads referenced in function "public: static
struct fftwf_plan_s * __cdecl itk::fftw::Proxy<float>::Plan_dft_c2r(int,int
const *,float (*)[2],float *,unsigned int,int,bool)" (?Plan_dft_c2r@
?$Proxy at M@fftw at itk@@SAPAUfftwf_plan_s@@HPBHPAY01MPAMIH_N at Z)

ITKFFT-4.6.lib(itkFFTWGlobalConfiguration.obj) : error LNK2019: unresolved
external symbol __imp__fftwf_cleanup referenced in function "private:
virtual __thiscall
itk::FFTWGlobalConfiguration::~FFTWGlobalConfiguration(void)"
(??1FFTWGlobalConfiguration at itk@@EAE at XZ)

ITKFFT-4.6.lib(itkFFTWGlobalConfiguration.obj) : error LNK2019: unresolved
external symbol __imp__fftwf_init_threads referenced in function
__catch$??0FFTWGlobalConfiguration at itk@@AAE at XZ$0

ITKFFT-4.6.lib(itkFFTWGlobalConfiguration.obj) : error LNK2019: unresolved
external symbol __imp__fftwf_cleanup_threads referenced in function
"private: virtual __thiscall
itk::FFTWGlobalConfiguration::~FFTWGlobalConfiguration(void)"
(??1FFTWGlobalConfiguration at itk@@EAE at XZ)

ITKFFT-4.6.lib(itkFFTWGlobalConfiguration.obj) : error LNK2019: unresolved
external symbol __imp__fftwf_import_system_wisdom referenced in function
__catch$??0FFTWGlobalConfiguration at itk@@AAE at XZ$0

ITKFFT-4.6.lib(itkFFTWGlobalConfiguration.obj) : error LNK2019: unresolved
external symbol __imp__fftwf_import_wisdom_from_file referenced in function
"public: static bool __cdecl
itk::FFTWGlobalConfiguration::ExportWisdomFileFloat(class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char> > const &)"
(?ExportWisdomFileFloat at FFTWGlobalConfiguration@itk@
@SA_NABV?$basic_string at DU?$char_traits at D@std@@V?$allocator at D@2@@std@@@Z)

C:\MIIA\FTTCBin\Release\FTTC.exe : fatal error LNK1120: 10 unresolved
externals


I've spent a long time searching the help forums and looked for ways to
resolve this, but to no avail.  Does anyone know what I may be doing
wrong?  I'm guessing I did something wrong when setting variables in CMake,
but haven't been able to find any information on how to set them correctly.

Thanks for your time and assistance!

Best,
Tim
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