PETSc version 3.15.5
PCAppendOptionsPrefix
Appends to the prefix used for searching for all PC options in the database. 
Synopsis
#include "petscksp.h" 
PetscErrorCode  PCAppendOptionsPrefix(PC pc,const char prefix[])
Logically Collective on PC
Input Parameters
|  | pc | - the preconditioner context | 
|  | prefix | - the prefix string to prepend to all PC option requests | 
Notes
A hyphen (-) must NOT be given at the beginning of the prefix name.
The first character of all runtime options is AUTOMATICALLY the
hyphen.
See Also
 PCSetOptionsPrefix(), PCGetOptionsPrefix()
Level
advanced
Location
src/ksp/pc/interface/precon.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages