Hello,
I have a base version of my code that uses FFTW3, which works when linking against MKL.
I then wrote an MPI version of the code that uses the FFTW3 MPI interface. MKL does not support this right out of the box, you have to compile the fftw3_cdft folder to link the FFTW MPI calls to the MKL cluster library. I was able to successfully do this, and the MPI version of the code works as well.
The problem arises when I try to go back to the base (non-MPI) version of the code. I get errors during compile on the same code that previously worked:
/usr/bin/ld: /opt/intel/oneapi/mkl/2024.0/lib/intel64/libmkl_core.a(mkl_get_mpi_wrappers_static.o): in function `mkl_serv_get_mpi_wrappers':
mkl_get_mpi_wrappers.c:(.text+0x4b): undefined reference to `MKLMPI_Get_wrappers'
Once I compiled the MPI FFTW wrappers, it seems that MKL must be linked against the cluster library (even though no MPI routines are used). If I reinstall MKL, it works again. Is there a way to link my project against only the base MKL library after building the MPI FFTW3 wrappers?
