!>
!> DCHKAB is the test program for the DOUBLE PRECISION LAPACK
!> DSGESV/DSPOSV routine
!>
!> The program must be driven by a short data file. The first 5 records
!> specify problem dimensions and program options using list-directed
!> input. The remaining lines specify the LAPACK test paths and the
!> number of matrix types to use in testing.  An annotated example of a
!> data file can be obtained by deleting the first 3 characters from the
!> following 10 lines:
!> Data file for testing DOUBLE PRECISION LAPACK DSGESV
!> 7                      Number of values of M
!> 0 1 2 3 5 10 16        Values of M (row dimension)
!> 1                      Number of values of NRHS
!> 2                      Values of NRHS (number of right hand sides)
!> 20.0                   Threshold value of test ratio
!> T                      Put T to test the LAPACK routines
!> T                      Put T to test the error exits
!> DGE    11              List types on next line if 0 < NTYPES < 11
!> DPO    9               List types on next line if 0 < NTYPES <  9
!> 

!>  NMAX    INTEGER
!>          The maximum allowable value for N
!>
!>  MAXIN   INTEGER
!>          The number of different values that can be used for each of
!>          M, N, NRHS, NB, and NX
!>
!>  MAXRHS  INTEGER
!>          The maximum number of right hand sides
!>
!>  NIN     INTEGER
!>          The unit number for input
!>
!>  NOUT    INTEGER
!>          The unit number for output
!> 

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