Dear All, I would like to ask about the lapack library used by alps: I have a following output: -- Using intel/mkl library: -L/opt/intel/composer_xe_2011_sp1.7.256/mkl MKL_PATH_WITH_PREFIX -L/opt/intel/composer_xe_2011_sp1.7.256/mkl -- Looking for intel/mkl library in /opt/intel/composer_xe_2011_sp1/mkl//lib/intel64;/opt/intel/composer_xe_2011_sp1/mkl//lib/emt;/opt/intel/composer_xe_2011_sp1/mkl//lib/;/opt/intel/composer_xe_2011_sp1/mkl//lib;/opt/intel/composer_xe_2011_sp1.7.256/mkl Falling back to CMake provied LAPACK/BLAS detection. -- A library with BLAS API found. -- A library with BLAS API found. -- A library with LAPACK API not found. Please specify library location. (i have uncommented debug messages) so my mkl is located in: /opt/intel/composer_xe_2011_sp1/mkl//lib/intel64 which is btw the default localtion of mkl library in newer versions of the compiler in the FindLapack.cmake the lines 61-65 are: STRING(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" MKL_VERSION "$ENV{MKL_HOME}") SET(LINK_LAPACK_DEFAULT 1) IF(${MKL_VERSION} MATCHES "10\\.0\\.[0-2]") SET(LINK_LAPACK_DEFAULT 0) ENDIF(${MKL_VERSION} MATCHES "10\\.0\\.[0-2]") I think (but I have never ever used cmake in my project) that this lines assume that mkl s installed in a directory that that contains specific version: /opt/intel/Compiler/11.5.6/mkl (then MKL_Version becomes 11.5.6) which is often not the case. I will try to fix this cmake file as well as I can... Regards, Mateusz Lacki