topic hpcc + mkl/fftw linking error in Intel® oneAPI Math Kernel Library

hpcc + mkl/fftw linking error

sonicato — Sun, 26 Oct 2008 23:17:23 GMT

Hello,

I get two undefined reference while linking the hpcc benchmark with the mkl 10.0.5 and the new beta release, which was delivered with 11.0.044 Compiler Suite:

/opt/intel/Compiler/11.0/044/mkl/lib/em64t/libmkl_intel_lp64.a(_DftiFreeDescriptorDM_lp64.o): In function `dftifreedescriptordm_':
_DftiFreeDescriptorDM_iface.c:(.text+0x2): undefined reference to `mkl_cdft_DftiFreeDescriptorDM'
/opt/intel/Compiler/11.0/044/mkl/lib/em64t/libmkl_intel_lp64.a(_DftiCommitDescriptorDM_lp64.o): In function `dfticommitdescriptordm_':
_DftiCommitDescriptorDM_iface.c:(.text+0x2): undefined reference to `mkl_cdft_DftiCommitDescriptorDM'

My linker flags:

I compiled the hpcc with the -DUSING_FFTW, also complied the fftw2c wrapper and mpi mkl fftw library.

Any help would be appreciated.
Thanks in advance,
Jens

Re: hpcc + mkl/fftw linking error

Andrey_G_Intel2 — Mon, 27 Oct 2008 06:44:15 GMT

Quoting - sonicato

Hello,

I get two undefined reference while linking the hpcc benchmark with the mkl 10.0.5 and the new beta release, which was delivered with 11.0.044 Compiler Suite:

/opt/intel/Compiler/11.0/044/mkl/lib/em64t/libmkl_intel_lp64.a(_DftiFreeDescriptorDM_lp64.o): In function `dftifreedescriptordm_':
_DftiFreeDescriptorDM_iface.c:(.text+0x2): undefined reference to `mkl_cdft_DftiFreeDescriptorDM'
/opt/intel/Compiler/11.0/044/mkl/lib/em64t/libmkl_intel_lp64.a(_DftiCommitDescriptorDM_lp64.o): In function `dfticommitdescriptordm_':
_DftiCommitDescriptorDM_iface.c:(.text+0x2): undefined reference to `mkl_cdft_DftiCommitDescriptorDM'

My linker flags:

-L/opt/intel/Compiler/11.0/044/mkl/lib/em64t /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libfftw2xc_intel.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libfftw2xf_intel.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libfftw2x_cdft_DOUBLE.a -lmkl_cdft_core -lmkl_blacs_openmpi_lp64 -lmkl_em64t -lguide -lmpi -lm

I compiled the hpcc with the -DUSING_FFTW, also complied the fftw2c wrapper and mpi mkl fftw library.

Any help would be appreciated.
Thanks in advance,
Jens

sonicato,

the linker in Linux-like OSes is sequential dependent. Try to change your link line to "L/opt/intel/Compiler/11.0/044/mkl/lib/em64t /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libfftw2xc_intel.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libfftw2xf_intel.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libfftw2x_cdft_DOUBLE.a -Wl,--start-group -lmkl_blacs_openmpi_lp64 -lmkl_em64t -lmkl_cdft_core -Wl,--end-group -lguide -lmpi -lm"

Andrey

Re: hpcc + mkl/fftw linking error

Vladimir_Petrov__Int — Mon, 27 Oct 2008 08:37:49 GMT

Quoting - sonicato

Hello Jens,

What you need to do is to change the linker flags as follows:

-L/opt/intel/Compiler/11.0/044/mkl/lib/em64t /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libfftw2xc_intel.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libfftw2xf_intel.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libfftw2x_cdft_DOUBLE.a -Wl,--start-group /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libmkl_cdft_core.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libmkl_intel_lp64.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libmkl_intel_thread.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libmkl_core.a /opt/intel/Compiler/11.0/044/mkl/lib/em64t/libmkl_blacs_openmpi_lp64.a -Wl,--end-group -lguide -lmpi -lm

This should resolve the dependency.

By the way, keep in mind that HPCC uses MPI FFTW interface in a modified manner. Namely the following functions must be altered to work with 64-bit integers (e.g. size_t instead of int's): fftw_mpi_create_plan and fftw_mpi_local_sizes.

Best regards,

-Vladimir

Re: hpcc + mkl/fftw linking error

sonicato — Mon, 27 Oct 2008 13:40:38 GMT

Thx for the fast answers!

These two replies solved my problem.

Regards,

Jens