topic Re:Problem with correct linking of lapack libraries for 64bits. in Intel® oneAPI Math Kernel Library

Problem with correct linking of lapack libraries for 64bits.

Cayo_G_ — Fri, 21 Aug 2020 16:06:53 GMT

Hello all,

I have a program in which I want to perform a diagonalization of a very large matrix using dsyevd subroutine routine. The dimension of my matrix is 80592, so I need to use integers of 11 digits.

For smaller matrices, I was compiling using the flags "-mkl -CB -heap-arrays -qopenmp -mkl -fpic -mcmodel=large" and everything was fine

But now that I need to use 64 bits integers, I am compiling with "-i8 -I${MKLROOT}/include/intel64/ilp64 -mkl=parallel -CB -heap-arrays -qopenmp -mkl -fpic -mcmodel=large -I${MKLROOT}/include/intel64/ilp64 ${MKLROOT}/lib/intel64/libmkl_blas95_ilp64.a ${ MKLROOT}/lib/intel64/libmkl_lapack95_ilp64.a -liomp5 -lpthread -lm -ldl", which I took from the Intel MKL Link Line advisor, using dynamic linking.

So, when I run my code and reach the part where I call dsyevd, I get the following error:

forrtl: severe (174): SIGSEGV, segmentation fault occurred

I am trying also with a simple small Identity matrix just to test the 64 bits linking. I get the same error.

Many thanks in advance,

Cayo Gonçalves

Re:Problem with correct linking of lapack libraries for 64bits.

Gennady_F_Intel — Mon, 24 Aug 2020 07:55:00 GMT

please remove -mkl=parallel option and link the example explicitly:

icc -DMKL_ILP64 -I${MKLROOT}/include -L${MKLROOT}/lib/intel64 -lmkl_intel_ilp64 -lmkl_intel_thread -lmkl_core -liomp5 -lpthread -lm -ldl

and declare all integer as MKL_INT into your example.

Re: Re:Problem with correct linking of lapack libraries for 64bits.

Cayo_G_ — Mon, 24 Aug 2020 09:38:30 GMT

Thank you for your answer Gennady. Sorry, I didn't realized that I didn't mentioned that I am using ifort, not icc. Does it make a difference for you solution?

Re:Problem with correct linking of lapack libraries for 64bits.

Gennady_F_Intel — Mon, 24 Aug 2020 10:48:34 GMT

it is the same for ifort or icc, icl ....

Re: Re:Problem with correct linking of lapack libraries for 64bits.

Cayo_G_ — Tue, 25 Aug 2020 19:38:58 GMT

Thank you very much, it worked

Re:Problem with correct linking of lapack libraries for 64bits.

Gennady_F_Intel — Wed, 26 Aug 2020 03:09:29 GMT

ok, thanks for the update

Re:Problem with correct linking of lapack libraries for 64bits.

Gennady_F_Intel — Wed, 26 Aug 2020 03:10:46 GMT

This issue has been resolved and we will no longer respond to this thread. If you require additional assistance from Intel, please start a new thread. Any further interaction in this thread will be considered community only