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# PetscOptionsDeprecated

mark an option as deprecated, optionally replacing it with `newname` Prints a deprecation warning, unless an option is supplied to suppress.

Logically Collective

## Input Parameters

- oldname - the old, deprecated option

- newname - the new option, or `NULL` if option is purely removed

- version - a string describing the version of first deprecation, e.g. “3.9”

- info - additional information string, or `NULL`.

## Options Database Key

- -options_suppress_deprecated_warnings - do not print deprecation warnings

## Notes

If `newname` is provided then the options database will automatically check the database for `oldname`.

The old call `PetscOptionsXXX`(`oldname`) should be removed from the source code when both (1) the call to `PetscOptionsDeprecated()` occurs before the new call to `PetscOptionsXXX`(`newname`) and (2) the argument handling of the new call to `PetscOptionsXXX`(`newname`) is identical to the previous call. See `PTScotch_PartGraph_Seq()` for an example of when (1) fails and `SNESTestJacobian()` where an example of (2) fails.

Must be called between `PetscOptionsBegin()` (or `PetscObjectOptionsBegin()`) and `PetscOptionsEnd()`. Only the process of MPI rank zero that owns the `PetscOptionsItems` are argument (managed by `PetscOptionsBegin()` or `PetscObjectOptionsBegin()` prints the information If newname is provided, the old option is replaced. Otherwise, it remains in the options database. If an option is not replaced, the info argument should be used to advise the user on how to proceed. There is a limit on the length of the warning printed, so very long strings provided as info may be truncated.

## See Also

`PetscOptionsBegin()`, `PetscOptionsEnd()`, `PetscOptionsScalar()`, `PetscOptionsBool()`, `PetscOptionsString()`, `PetscOptionsSetValue()`

## Level

developer

## Location

include/petscoptions.h

Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages