topic lapack.f90 how to include correctly in Intel® oneAPI Math Kernel Library

lapack.f90 how to include correctly

DmitrySkachkov — Fri, 27 Dec 2024 03:18:04 GMT

Hello,

I included into the program

INCLUDE 'lapack.f90' Module myMKL include 'mkl_lapack.fi' end module myMKL

and also included "use" statements

use F95_PRECISION use LAPACK95 use myMKL call getrf(Gk1,ipvt,info)

in the subroutine which call getrf subroutine

However, during the compilation I got an error:

ifxKSN7m7.i90:(.text+0x5690c): undefined reference to `zgetrf_f95_' ifxKSN7m7.i90:(.text+0x569cc): undefined reference to `zgetri_f95_' make: *** [all] Error 1

Could you please help

Re: lapack.f90 how to include correctly

mecej4 — Sat, 28 Dec 2024 01:53:42 GMT

In addition to using the Lapack95 interfaces, you also need to link the Lapack-95 (and, if needed, the Blas95) libraries.

See the MKL Link Line Advisor for how to do this.

There is an older example code for ?GetRF in this forum. I built and ran that example code using the commands

ifx /Qmkl xgetrf.f90 mkl_lapack95_ilp64.lib xgetrf

Re: lapack.f90 how to include correctly

DmitrySkachkov — Sun, 29 Dec 2024 04:12:26 GMT

Thank you!

I used the suggested options for compiler

-I${MKLROOT}/include/mkl/intel64/ilp64 -i8 -qmkl-ilp64=sequential

and for linker

-qmkl-ilp64=sequential ${MKLROOT}/lib/libmkl_blas95_ilp64.a ${MKLROOT}/lib/libmkl_lapack95_ilp64.a

However I got an error in compilation:

ifx -o "./bin/"wtb.x wtb_main.o module_input.o module_hamiltonian.o module_bse.o module_pce.o module_coulomb.o module_math.o module_berry.o module_optics.o module_tools.o module_kmesh.o -qmkl-ilp64=s equential /opt/shared/intel-oneapi/2024.2.0.634/mkl/2024.2/lib/libmkl_blas95_ilp64.a /opt/shared/intel-oneapi/2024.2.0.634/mkl/2024.2/lib/libmkl_lapack95_ilp64.a /opt/shared/intel-oneapi/2024.0.1.46/compiler/2024.0/lib/libifcoremt.a(for_vm.o): In function `check_KMP': for_vm.c:(.text+0x694): undefined reference to `__kmpc_global_thread_num' for_vm.c:(.text+0x716): undefined reference to `__kmpc_global_thread_num' for_vm.c:(.text+0x738): undefined reference to `__kmpc_global_thread_num' module_bse.o: In function `module_bse_mp_dielbsep_': ifxUx8Fwo.i90:(.text+0x1043): undefined reference to `__kmpc_fork_call' module_bse.o: In function `module_bse_mp_dielbsev_': ifxUx8Fwo.i90:(.text+0x10b7): undefined reference to `__kmpc_fork_call' module_bse.o: In function `module_bse_mp_dielbseptemp_': ifxUx8Fwo.i90:(.text+0x6955): undefined reference to `__kmpc_fork_call' module_bse.o: In function `module_bse_mp_bsedielraw_': ifxUx8Fwo.i90:(.text+0x69a1): undefined reference to `__kmpc_global_thread_num' ifxUx8Fwo.i90:(.text+0x8af1): undefined reference to `__kmpc_for_static_init_8' ifxUx8Fwo.i90:(.text+0x91dd): undefined reference to `__kmpc_for_static_fini' ifxUx8Fwo.i90:(.text+0x91ee): undefined reference to `__kmpc_barrier'

I am using Intel-oneapi-mkl/2024

Re: lapack.f90 how to include correctly

mecej4 — Sun, 29 Dec 2024 15:35:46 GMT

Please check that you are specifying the correct openMP options when using the MKL Link Line advisor.

Re: lapack.f90 how to include correctly

DmitrySkachkov — Sun, 29 Dec 2024 19:26:03 GMT

This is exactly what I want.

I would like to compile my code with OpenMP options, but MKL library to link as sequential.

Is it possible?

Re: lapack.f90 how to include correctly

Ruqiu_C_Intel — Tue, 31 Dec 2024 05:26:28 GMT

Suppose it's the similar topic as this thread https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Using-MKL-with-MKL-NUM-THREADS-1/m-p/1652980#M36782

And the solution is:

For using oneMKL + OpenMP threading, we recommend you use intel OpenMP -liomp5 link option. For example,

${MKLROOT}/lib/libmkl_blas95_ilp64.a ${MKLROOT}/lib/libmkl_lapack95_ilp64.a -Wl,--start-group ${MKLROOT}/lib/libmkl_intel_ilp64.a ${MKLROOT}/lib/libmkl_intel_thread.a ${MKLROOT}/lib/libmkl_core.a -Wl,--end-group -liomp5 -lpthread -lm -ldl

More advisor, please check onemkl-link-line-advisor