# PetscOptionsSetAlias
Makes a key and alias for another key 
## Synopsis
```
#include "petscsys.h"   
PetscErrorCode PetscOptionsSetAlias(PetscOptions options, const char newname[], const char oldname[])
```
Logically Collective


## Input Parameters

- ***options -*** options database, or NULL for default global database
- ***newname -*** the alias
- ***oldname -*** the name that alias will refer to




The collectivity of this routine is complex; only the MPI ranks that call this routine will
have the affect of these options. If some processes that create objects call this routine and others do
not the code may fail in complicated ways because the same parallel solvers may incorrectly use different options
on different ranks.


## See Also
 `PetscOptionsGetInt()`, `PetscOptionsGetReal()`, `OptionsHasName()`,
`PetscOptionsGetString()`, `PetscOptionsGetIntArray()`, `PetscOptionsGetRealArray()`, `PetscOptionsBool()`,
`PetscOptionsName()`, `PetscOptionsBegin()`, `PetscOptionsEnd()`, `PetscOptionsHeadBegin()`,
`PetscOptionsStringArray()`, `PetscOptionsRealArray()`, `PetscOptionsScalar()`,
`PetscOptionsBoolGroupBegin()`, `PetscOptionsBoolGroup()`, `PetscOptionsBoolGroupEnd()`,
`PetscOptionsFList()`, `PetscOptionsEList()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/objects/options.c.html#PetscOptionsSetAlias">src/sys/objects/options.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/objects/options.c)


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