Hello, I have downloaded binding of boost from http://news.tiker.net/dl/software/boost-bindings and copied them under the boost/numeric. In my code, I am using 'gesvd' function of lapack. There is no compilation error, but while linking following undefined reference to '_dgesvd' error occurs: ../../lib/libTemp.a(MatrixOperationsDefault.o): In function `_ZN16MatrixOperations6MO_svdERN5boost7numeric5ublas6matrixIdNS2_15basic_row_majorIjiEENS2_15unbounded_arrayIdSaIdEEEEESA_SA_SA_': /cygdrive/e/workspace3_2/Locomotion/BOUN/Locomotion/src/MatrixOperations.cc:159: undefined reference to `_dgesvd_' ../../lib/libTemp.a(MatrixOperationsDefault.o): In function `_ZN16MatrixOperations6MO_svdERN5boost7numeric5ublas6matrixIdNS2_15basic_row_majorIjiEENS2_15unbounded_arrayIdSaIdEEEEESA_SA_SA_': /cygdrive/c/boost/boost/numeric/ublas/exception.hpp:127: undefined reference to `_dgesvd_' collect2: ld returned 1 exit status make: *** [test.exe] Error 1 Do I have to compile boost with added binding files again? If yes, how? Best Regards...