topic Re: simple example in Intel® oneAPI Math Kernel Library

simple example

joleho — Tue, 11 Mar 2008 16:44:54 GMT

Hi,

I am new in Blas and Lapack and have probably a very simple question. I installed the MKL library 10 and tried to run the example from the User Guide for C++ but I got the error:

g++ -o tmp testblas2.cc -L$MKLPATH -I$MKLINCLUDE -lmkl

testblas2.cc:4: error: declaration of C function `void zdotc(complex16*, int*, complex16*, int*, complex16*, int*)' conflicts with
/opt/intel/mkl/10.0/include/mkl_blas.h:297: error: previous declaration `void zdotc(MKL_Complex16*, int*, MKL_Complex16*, int*, MKL_Complex16*, int*)' here
testblas2.cc:9: error: `main' must return `int'
testblas2.cc: In function `int main(...)':

what is wrong?

Jojo

Re: simple example

TimP — Tue, 11 Mar 2008 16:59:54 GMT

You may have a more recent version of g++ than what testblas2 was written for, or the example may not be updated for consistency with MKL 10. It's better to rely entirely on the header file, and remove the conflicting declaration from the example source.

Re: simple example

joleho — Tue, 11 Mar 2008 17:08:34 GMT

Sorry, its not clear to me what to do?
May icc work for this example?

Re: simple example

TimP — Tue, 11 Mar 2008 18:33:18 GMT

icc may not be as strict in comparing syntax as the latest g++ is, so it may work.

Re: simple example

joleho — Tue, 11 Mar 2008 20:07:21 GMT

Forall bloody beginners (like me)having the same problem:

#include "mkl_typse.h"

MKL_Complex16* a;

compile with:

g++ -o tmp testblas.cc -L$MKLPATH -I$MKLINCLUDE -lmkl -lguide -lpthread

then its fine...