Greased Lightning: ATLAS

[Keith Goodman]

Now that I can compile Octave, thanks to the Octave help mailing list,
how do I customize the compile to use atlas that has been tuned for my
processor?

Also, from my configure log below it looks like I'm using fortran
libraries that are optimized for i486. Is that a concern (speedwise)
if my processor is an i868?

My configure log:

Octave is now configured for i686-pc-linux-gnu

  Source directory:     .
  Installation prefix:  /usr/local
  C compiler:           gcc  -mieee-fp  -Wall -W -Wshadow -g -O2
  C++ compiler:         g++  -mieee-fp  -Wall -W -Wshadow -g -O2
  Fortran compiler:     g77 -O -mieee-fp
  Fortran libraries:     -L/usr/lib/gcc-lib/i486-linux/3.3.5
-L/usr/lib/gcc-lib/i486-linux/3.3.5/../../.. -lhdf5 -lz -lfrtbegin
-lg2c -lm -lgcc_s
  BLAS libraries:       -llapack -lcblas -lf77blas -latlas
  FFTW libraries:       -lfftw3
  GLPK libraries:       -lglpk
  UMFPACK libraries:    -lumfpack -lamd
  HDF5 libraries:       -lhdf5
  MPI libraries:
  LIBS:                 -lreadline  -lncurses -ldl -lhdf5 -lz -lm
  Default pager:        less
  gnuplot:              gnuplot

  Do internal array bounds checking:  false
  Build static libraries:             false
  Build shared libraries:             true
  Dynamic Linking:                    true (dlopen)
  Include support for GNU readline:   true
  64-bit array dims and indexing:     false



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