libitsol-dev 1.0.0-3 (s390x binary) in ubuntu bionic

 ITSOL is a library of iterative solvers for general sparse linear systems of
 equations. ITSOL can be viewed as an extension of the itsol module in SPARSKIT.
 It is written in C and offers a selection of recently developed
 preconditioners. The preconditioner suite includes:
 .
   * ILUK (ILU preconditioner with level of fill)
   * ILUT (ILU preconditioner with threshold)
   * ILUC (Crout version of ILUT)
   * VBILUK (variable block preconditioner with level of fill - with automatic
     block detection)
   * VBILUT (variable block preconditioner with threshold - with automatic
     block detection)
   * ARMS (Algebraic Recursive Multilevel Solvers -- includes actually several
     methods - In particular the standard ARMS and the ddPQ version which uses
     nonsymmetric permutations)
 .
 Note that ITSOL is a scalar package. You may find parallel implementations of
 some of the preconditioners listed above in pARMS.
 .
 This package provides the itsol header files required to compile C/C++ programs
 that use ITSOL.