The last of the Watcom F77 compilers became a free resource (a least a few years ago), and it is not difficult to interface to J (Windows environment).
Comversion of LAPACK software into straight F77 is usually not hard, its only if you want some of the F99 goodies that you will have trouble. The only F99 compiler I know about ran on a local main-frame. When I looked at a version for Windows it was sort of a mess. There may well be some other F99 compilers around, I just haven't looked in the last 3 years. When I looked at the Micro-soft version (which may since have been taken over by others) interfacing to J was out of the question (required material being put in J.exe for every routine that was to iterface). Ralph S ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
