Setting option: help (no value) (source: file)
See https://petsc.org/release/changes for recent updates.
See https://petsc.org/release/faq for problems.
See https://petsc.org/release/manualpages for help.
 -version: prints PETSc version
 -help intro: prints example description and PETSc version, and exits
 -help: prints example description, PETSc version, and available options for used routines
-help # (source: file)