In my old project, I just download the blas library and use it directly. Now I change my project to use the mkl blas. Since all my project subroutines are written in fortran 77 format, I want to use themkl_blas.fi for FORTRAN 77 interface instead of my downloaed blas library. Beacuse I am a starter, I can not set the configuration rightly to use the mkl blas library, error of unresolved subroutine always occurs. So anyone can give me the configuration of using mkl blas fortran 77 interface in details, I appreciate.