LAPACK 3.1
October 2006

Purpose: To build out of tree. Very useful for testing the same versions of
LAPACK on different machines or with different compiler or with different
compiler flags etc.

Contribution from Edward Smyth, NAG, Ltd..

Usage: In the LAPACK directory type:
	 "tar xvf INSTALL/lpk_gnumake.tar" then "make"

   The make.inc included is for Linux with g77.

   Some of the new features are:

* make.inc has a variable USE_BLAS. If this is "reference" it will compile
  the reference BLAS included with LAPACK. Otherwise it will use the blas
  library specified in make.inc as OPTBLASLIB. make.inc currently has
  the default setting as "reference". This is probably not the best choice,
  but useful now for testing.

* Everything is generated in the directory called $(BUILDDIR), which by
  default will be BUILD$(PLAT)/ref for reference BLAS, or BUILD$(PLAT)/opt
  if using $(OPTBLASLIB) for BLAS. This can of course be overridden at
  runtime, even going to a different filesystem, e.g. make all BUILDDIR=/tmp/foo

* OPT0OBJ lists LAPACK SRC files to be compiled without optimization. dlamch and
  slamch are included here, but more could be added if needed on different platforms.
  Note that:
      - This could be extended to be a multi-level option, instead of just unoptimized
      and optimized.
      - This is only for LAPACK SRC. A similar scheme could be added for e.g. the
      TIMING/LIN/LINSRC and TIMING/EIG/EIGSRC files if needed.

* Doing a subset of LAPACK (eg just "complex16") is handled a bit differently. It uses
  make variables
  do_single    := yes
  do_complex   := yes
  do_double    := yes
  do_complex16 := yes


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