topic Problem in Intel® Moderncode for Parallel Architectures

Problem

Martin_Fuchs — Tue, 20 Jul 2010 08:27:21 GMT

Hello I have following problem. I want to use mkl on a Intel core2 CPU (Vendor ID: GenuineIntel) using the ifort compiler. I get this error message:
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `__mth_i_dfloatuk'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_orders_chunk8'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_penter'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_lcpu2'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_orders_init8'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_ncpus'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_pexit'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `__fmth_i_dsincos'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `__c_mset4'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `__c_mcopy8'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_p'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_orders_beg'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_scheds8'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_scheds_dyn_init8'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_scheds'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_ncpus2'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `__c_mzero4'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_scheds_dyn_init'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `__c_mcopy8_bwd'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_v'
/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t/libmkl_pgi_thread.so: undefined reference to `_mp_penter_set'
...

I used this compiler settings:
/home/fuchs/intel/Compiler/11.1/072/bin/intel64/ifort -O3 /home/fuchs/workspace-f90/Schwerefeldbestimmung/*.o RefOrbit.f90 -o RefOrbit -I/home/fuchs/workspace-f90/Schwerefeldbestimmung/ -L/home/fuchs/intel/Compiler/11.1/072/mkl/lib/em64t -lmkl_pgi_thread -lmkl_core -lmkl_intel_ilp64 -lmkl_lapack95_ilp64 -openmp

Can someone help me please...

Problem

Michael_K_Intel2 — Tue, 20 Jul 2010 10:17:19 GMT

Hi Martin,

the unresolved symbols that you've seen come from the PGI threading library of MKL. As you're compiling and linking with ifort you should remove the PGI library from the command line and replace with either libmkl_gnu_thread.a or libmkl_intel_thread.a.

Does that work out for you?

Cheers,
-michael

Problem

Martin_Fuchs — Tue, 20 Jul 2010 10:41:07 GMT

Jep that worked... now I can compile without any errors but when I start the executable it says...
./RefOrbit: error while loading shared libraries: libmkl_intel_thread.so: cannot open shared object file: No such file or directory

Problem

Gennady_F_Intel — Tue, 20 Jul 2010 11:02:22 GMT

Martin,

my 2 cents regarding this issue: for the future it would be usefull if you will refer to the MKL Linker Adviser, which will provide thr proper linking line for all most important combinations.

--Gennady

Problem

Gennady_F_Intel — Tue, 20 Jul 2010 11:03:07 GMT

did you check LD_LIBRARY_PATH?

Problem

Martin_Fuchs — Tue, 20 Jul 2010 11:12:56 GMT

Jepped that worked... Now finally this error
./RefOrbit: error while loading shared libraries: libiomp5.so: cannot open shared object file: No such file or directory

this might be similar I guess...

Problem

Martin_Fuchs — Tue, 20 Jul 2010 11:23:03 GMT

LD_LIBRARY_PATH=/DGFI16/home/fuchs/intel/Compiler/11.1/072/lib/intel64:$LD_LIBRARY_PATH
^^ so finally I made it... Thanks so much to every one... !!! With this last line it compiled and worked...

Problem

Gennady_F_Intel — Tue, 20 Jul 2010 11:40:07 GMT

Well. Thats fine. Let me add one more comment regarding error while loading shared libraries: libiomp5.so

I noticed you uses MKL version which is bundled with Intel Compiler,

hence in this case all libiomp*.* binary objects are situated into /lib/intel64/ directory,

Where, as I guess in your case == /home/fuchs/intel/Compiler/11.1/072/

--Gennady