But do I need to build the the complex routines? Using your configure script (thanks!) with: --disable-single --disable-complex fails in "make check", there are unresolved references in the complex*16 routines. Maybe I should build the whole thing? When Gretl calls a Lapack routine, it has to specify s d c or z prefix, so if only the double real routines are used, I could build a smaller library. I don't need Lapack for anything else, at least for right now. Bob On Mon, Jan 3, 2011 at 4:46 AM, Allin Cottrell <cottrell(a)wfu.edu&gt; wrote: