I'm using the MKL version distributed with composer_xe_2013.1.117 for Linux, and I cannot link to the F77 interface to FFTW. The functions I'm looking for are documented here: http://software.intel.com/sites/products/documentation/doclib/stdxe/2013/composerxe/mkl/mklman/GUID-... but none of the references to the f77 functions can be resolved. For example:
FFT.f90:(.text+0x799): undefined reference to `rfftw_f77_create_plan_'
The fftw_f77 functions seem to be missing entirely:
> nm * | grep -i fftw | grep -i f77
000000000012f770 T fftw_plan_dft_c2r_1d
000000000012f770 T fftw_execute_split_dft_c2r
Should I look for these functions in a different directory? Please help.
The FFTW2 wrappers are provided as source code and you have to compile and build the wrapper library before you can use them. Instructions on how to build the FFTW2 wrappers can be found here.
Note: If you use FFTW3 then you don't need this step. FFTW3 wrappers are already integrated inMKL.