https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/intel-mkl-Error-LNK2005/m-p/985954#M17754 I used a function named ZGEHRD of Intel MKL to solve a matrix's eigvalues, and I also added mkl_c.lib to my project, but the visual .net 2003 always says: mkl_ia32.lib(p4_zgemm_omp.obj) : error LNK2005: ___zgemm_259__par_loop1 has been already defined in mkl_ia32.lib(p3_zgemm_omp.obj). and so on. would anyone help me? Sun, 31 Aug 2003 10:49:00 GMT tnd 2003-08-31T10:49:00Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/intel-mkl-Error-LNK2005/m-p/985954#M17754 I used a function named ZGEHRD of Intel MKL to solve a matrix's eigvalues, and I also added mkl_c.lib to my project, but the visual .net 2003 always says: mkl_ia32.lib(p4_zgemm_omp.obj) : error LNK2005: ___zgemm_259__par_loop1 has been already defined in mkl_ia32.lib(p3_zgemm_omp.obj). and so on. would anyone help me? Sun, 31 Aug 2003 10:49:00 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/intel-mkl-Error-LNK2005/m-p/985954#M17754 tnd 2003-08-31T10:49:00Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/intel-mkl-Error-LNK2005/m-p/985955#M17755 I am not familiar with using MKL, but it sounds as if you have asked to link in two variations of MKL at the same time. I suggest you check the MKL documentation to see which libraries you're supposed to use. Steve Wed, 03 Sep 2003 03:12:07 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/intel-mkl-Error-LNK2005/m-p/985955#M17755 Steven_L_Intel1 2003-09-03T03:12:07Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/intel-mkl-Error-LNK2005/m-p/985956#M17756 I have used the beta MKL. There are at least three libraries: a static one for C; a static one for Fortran; a DLL for both, I guess; I know nothing about DLL's except their existence and general nature, which already about 10 times more than I desire to know :). You obviously need to link with the appropriate one. I think the name of the C version ends in (surprise) "_c" and that of the static fortran in "_s". Keith (Intentional flame bait provided upon request.) Wed, 03 Sep 2003 07:13:42 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/intel-mkl-Error-LNK2005/m-p/985956#M17756 kdkeefer 2003-09-03T07:13:42Z