petsc-3.12.4 2020-02-04
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# PetscOptionsSetFromOptions

Sets options related to the handling of options in PETSc

### Synopsis

    #include "petscsys.h"
    PetscErrorCode PetscOptionsSetFromOptions(PetscOptions options)

Collective on PETSC_COMM_WORLD

### Input Parameter

options -options database, use NULL for default global database

### Options Database Keys

| -options_monitor <optional filename> | - prints the names and values of all runtime options as they are set. The monitor functionality is not available for options set through a file, environment variable, or on the command line. Only options set after PetscInitialize() completes will be monitored.
| -options_monitor_cancel | - cancel all options database monitors

### Notes

To see all options, run your program with the -help option

### Level

intermediate

### Location

src/sys/objects/options.c

### Examples

src/snes/examples/tutorials/ex22.c.html
Index of all Sys routines
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Index of all manual pages