build — Builds a preconditioner

call prec%build(a, desc_a, info[,amold,vmold,imold])

Type:: Synchronous.
On Entry
a: the system sparse matrix. Scope: local
Type: required
Intent: in, target.
Specified as: a sparse matrix data structure psb_Tspmat_type.
prec: the preconditioner.
Scope: local
Type: required
Intent: inout.
Specified as: an already initialized precondtioner data structure psb_prec_type
desc_a: the problem communication descriptor. Scope: local
Type: required
Intent: in, target.
Specified as: a communication descriptor data structure psb_desc_type.
amold: The desired dynamic type for the internal matrix storage.
Scope: local.
Type: optional.
Intent: in.
Specified as: an object of a class derived from psb_T_base_sparse_mat.
vmold: The desired dynamic type for the internal vector storage.
Scope: local.
Type: optional.
Intent: in.
Specified as: an object of a class derived from psb_T_base_vect_type.
imold: The desired dynamic type for the internal integer vector storage.
Scope: local.
Type: optional.
Intent: in.
Specified as: an object of a class derived from (integer) psb_T_base_vect_type.

On Return
prec: the preconditioner.
Scope: local
Type: required
Intent: inout.
Specified as: a precondtioner data structure psb_prec_type
info: Error code.
Scope: local
Type: required
Intent: out.
An integer value; 0 means no error has been detected.

The amold, vmold and imold arguments may be employed to interface with special devices, such as GPUs and other accelerators.