FFTW

Intel MKL

We recommend using the Intel MKL implementation of FFTW. To use MKL implementation of FFTW, first load the corresponding module and, second, export the following path to correct include folder:

Option 1: Full Intel suite

module load intel/oneapi-all
export CPATH=$MKLROOT/include/fftw:$CPATH

Option 2: Intel MKL only

module load 2022r2
module load intel-mkl
export CPATH=/apps/arch/2022r2/software/linux-rhel8-skylake_avx512/gcc-8.5.0/intel-mkl-2020.4.304-562z3j76h4zy26bjp5r2mrimud6fshrc/compilers_and_libraries_2020.4.304/linux/mkl/include/fftw:$CPATH