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# PetscDLLibraryOpen
Opens a PETSc dynamic link library 
## Synopsis
```
PetscErrorCode PetscDLLibraryOpen(MPI_Comm comm, const char path[], PetscDLLibrary *entry)
```
Collective


## Input Parameters

- ***comm -*** MPI processes that are opening the library
- ***path -*** name of the library, can be a relative or absolute path



## Output Parameter

- ***entry -*** a PETSc dynamic link library entry





## Notes
[[<http,ftp>://hostname]/directoryname/]libbasename[.so.1.0]

If the library has the symbol `PetscDLLibraryRegister_basename()` in it then that function is automatically run
when the library is opened.

${PETSC_ARCH} occurring in directoryname and filename
will be replaced with the appropriate value.


## See Also
 `PetscDLLibrary`, `PetscLoadDynamicLibrary()`, `PetscDLLibraryAppend()`, `PetscDLLibraryRetrieve()`, `PetscDLLibrarySym()`, `PetscDLLibraryClose()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/dll/dl.c.html#PetscDLLibraryOpen">src/sys/dll/dl.c</A>


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