UFconfig contains configuration settings for all many of the software packages
  that I develop or co-author.  Note that older versions of some of these packages
  do not require UFconfig.
  
    Package  Description
    -------  -----------
    AMD	   approximate minimum degree ordering
    CAMD	   constrained AMD
    COLAMD   column approximate minimum degree ordering
    CCOLAMD  constrained approximate minimum degree ordering
    UMFPACK  sparse LU factorization, with the BLAS
    CXSparse int/long/real/complex version of CSparse
    CHOLMOD  sparse Cholesky factorization, update/downdate
    KLU	   sparse LU factorization, BLAS-free
    BTF	   permutation to block triangular form
    LDL	   concise sparse LDL'
    LPDASA   LP Dual Active Set Algorithm
  
  UFconfig is not required by:
  
    CSparse		    a Concise Sparse matrix package
    RBio			    read/write files in Rutherford/Boeing format
    UFcollection		    tools for managing the UF Sparse Matrix Collection
  
  In addition, the xerbla/ directory contains Fortan and C versions of the
  BLAS/LAPACK xerbla routine, which is called when an invalid input is passed to
  the BLAS or LAPACK.  The xerbla provided here does not print any message, so
  the entire Fortran I/O library does not need to be linked into a C application.
  Most versions of the BLAS contain xerbla, but those from K. Goto do not.  Use
  this if you need too.