This directory src/contrib/spai contains code to interface
PETSc to the Sparse Approximate Inverse Preconditioner (SPAI)
implemented by Steven Bernard and available at 

     http://www.sam.math.ethz.ch/~grote/spai/
  
   To use this, you must first get and install the SPAI package.
Unfortunately, SPAI does not come ready to compile into a library
and is not portable to most Unix machines; though it does say it 
compiles on both the IBM SP and Cray T3D, you may have to hack it
slightly for other machines. 

  Once you have created the spai_3.0 directory from the tar file.

  1) Compile all the .o files in the spai_3.0 directory. You will 
     probably have to edit the Makefile and then run make spai
  2) Create a library with the command 
     ar cr libspai.a *.o
  3) On machines that require it, run ranlib on the library
     ranlib libspai.a
  4) Edit the PETSc file bmake/$PETSC_ARCH/base.site and indicate
     the location of the SPAI directory
  5) Cd to src/contrib/pc/spai/src and do make BOPT=g and make BOPT=O
  7) You are now ready to run an example, cd to src/contrib/pc/spai/examples/
     tutorials and make ex1 in the usual PETSc way. You can run it
     using any of the test matrices in src/mat/examples/matrices

  If you have problems compiling SPAI please contact Steven Bernard
directly. If you have problems linking PETSc with SPAI or running the 
examples then after checking the docs/troubleshooting.html and 
docs/bugreporting.html file contact petsc-maint@mcs.anl.gov

   This contribution has not been extensively tested or optimized for 
performance yet.