topic everything works on my part: in Intel® oneAPI Math Kernel Library

FFTW2

YUZHONG__HUI — Mon, 18 Mar 2019 10:30:54 GMT

I use vs2013+ivf2013 program my fortran code, The FFTW2 wrappers to Intel MKL provide the following subroutines for calling from Fortran:
call fftw_f77_create_plan(plan, n, dir, flags)
call fftw_f77(plan, howmany, in, istride, idist, out, ostride, odist)
call fftw_f77_one(plan, in, out)
call fftw_f77_threads(nthreads, plan, howmany, in, istride, idist, out, ostride, odist)
call fftw_f77_threads_one(nthreads, plan, in, out)
call fftw_f77_destroy_plan(plan)
call fftwnd_f77_create_plan(plan, rank, n, dir, flags)
call fftw2d_f77_create_plan(plan, nx, ny, dir, flags)
call fftw3d_f77_create_plan(plan, nx, ny, nz, dir, flags)
call fftwnd_f77(plan, howmany, in, istride, idist, out, ostride, odist)
call fftwnd_f77_one(plan, in, out)
call fftwnd_f77_threads(nthreads, plan, howmany, in, istride, idist, out, ostride,odist)
call fftwnd_f77_threads_one(nthreads, plan, in, out)

According to the 'FFTW Interface to Intel® Math Kernel Library', just provide the method in Linux like this:make libintel64,,,Any one know how to do in windows? Anyone could tell me the detials of using above subroutines?

the similar with Windows. You

Gennady_F_Intel — Mon, 18 Mar 2019 11:55:40 GMT

the similar with Windows. You may look at mklroot/interfaces\fftw2xf\ makefile --

@type <<
Usage: nmake {libia32|libintel64}
[PRECISION=MKL_DOUBLE|MKL_SINGLE]
[compiler=compiler_name]

Quote:Gennady F. (Intel)

YUZHONG__HUI — Tue, 19 Mar 2019 01:09:52 GMT

Gennady F. (Intel) wrote:
the similar with Windows. You may look at mklroot/interfaces\fftw2xf\ makefile --
@type <<
Usage: nmake {libia32|libintel64}
[PRECISION=MKL_DOUBLE|MKL_SINGLE]
[compiler=compiler_name]

Thank you very much for you reply！I know the mklroot/interfaces\fftw2xf\ makefile --

@type <<
Usage: nmake {libia32|libintel64}
[PRECISION=MKL_DOUBLE|MKL_SINGLE]
[compiler=compiler_name]

But I don't know what should I input in the command window！According to other's command :nmake libia32 compiler=msvs ,After compiling, I can see that lib\intel64 under MKL directory has one more lib file: fftw2xf_double_msvs.lib. Unfortunately,the test still failed.Below is my test code:

program main

integer :: N

parameter (N=5)

real in, var

real out

dimension in(N), out(N)

dimension var(N)

integer :: plan,plan2

integer :: i

do i=1,N

in(i) = i + 1

end do

call rfftw_f77_create_plan(plan,N,FFTW_FORWARD,FFTW_ESTIMATE)

call rfftw_f77_one(plan,in,var)

call rfftw_f77_destroy_plan(plan)

call rfftw_f77_create_plan(plan2,N,FFTW_BACKWARD,FFTW_ESTIMATE)

call rfftw_f77_one(plan2,var,out)

call rfftw_f77_destroy_plan(plan2)

do i=1,N

write(*,*) i,real(in(i)),real(out(i))

end do

end program main

The error message is :

error    5   error LNK2001: An external symbol that cannot be resolved _fltused   Source1.obj
error    6   error LNK2001: An external symbol that cannot be resolved mainCRTStartup   LINK
error    4   error LNK2019: An external symbol that cannot be resolved _RTC_CheckStackVars，该符号在函数 MAIN__ 中被引用   Source1.obj
error    1   error LNK2019: An external symbol that cannot be resolved RFFTW_F77_CREATE_PLAN，该符号在函数 MAIN__ 中被引用   Source1.obj
error    3   error LNK2019: An external symbol that cannot be resolved RFFTW_F77_DESTROY_PLAN，该符号在函数 MAIN__ 中被引用   Source1.obj
error    2   error LNK2019:An external symbol that cannot be resolved RFFTW_F77_ONE，该符号在函数 MAIN__ 中被引用   Source1.obj
error    7   fatal error LNK1120: 6 个无法解析的外部命令   x64\Debug\tiaoshifftw2.exe

everything works on my part:

Gennady_F_Intel — Fri, 29 Mar 2019 05:29:00 GMT

everything works on my part:

1. Building fftw2 wrappers:

cd mkl2019_root\windows\mkl\interfaces\fftw2xf\

nmake libintel64

......

rfftwnd_threads_real_to_complex.c
lib -out:"..\..\lib\intel64\fftw2xf_double_intel.lib" obj_double_intel\*.obj
Microsoft (R) Library Manager Version 14.00.24215.1

2. linking you example like as follow:

ifort /w /Fo /I"mkl_install_directory\include" test_fftw2.f /Fe_test.exe mkl_core.lib mkl_intel_lp64.lib mkl_sequential.lib fftw2xf_double_intel.lib