https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/lapack-ilp64/m-p/860405#M7447 Hi,<BR />I can only find a reference to em64t/libmkl_lapack.a<BR />and nothing that would be ilp64. <BR />I need to use routine dgesdd, for m=n=65536. However, the appropriate lwork value for this is approx <BR />1.7e10, so too large to fit into a 32 bit integer.<BR /><BR />If there is no ilp64 version, does this mean lapack dgesdd can't be used for large matrices?<BR /><BR />Thanks...<BR /> Wed, 09 Jul 2008 14:29:52 GMT Basden__Alastair 2008-07-09T14:29:52Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/lapack-ilp64/m-p/860405#M7447 Hi,<BR />I can only find a reference to em64t/libmkl_lapack.a<BR />and nothing that would be ilp64. <BR />I need to use routine dgesdd, for m=n=65536. However, the appropriate lwork value for this is approx <BR />1.7e10, so too large to fit into a 32 bit integer.<BR /><BR />If there is no ilp64 version, does this mean lapack dgesdd can't be used for large matrices?<BR /><BR />Thanks...<BR /> Wed, 09 Jul 2008 14:29:52 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/lapack-ilp64/m-p/860405#M7447 Basden__Alastair 2008-07-09T14:29:52Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/lapack-ilp64/m-p/860406#M7448 With MKL 10 or 11, rather than using the backwards compatibility script (which specified lp64, core, thread), you must specify the ilp64 library, core library, and your choice of thread or sequential. For MKL 9, there is a separate download for ilp64. Wed, 09 Jul 2008 16:04:05 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/lapack-ilp64/m-p/860406#M7448 TimP 2008-07-09T16:04:05Z