program ex10f90

#include "petsc/finclude/petsc.h"
  use petsc
  implicit none

  PetscErrorCode                            :: ierr
  Character(len=256)                        :: filename
  PetscBool                                 :: flg
  PetscInt                                  :: n

  PetscCallA(PetscInitialize(ierr))
  PetscCallA(PetscOptionsGetString(PETSC_NULL_OPTIONS, PETSC_NULL_CHARACTER, '-f', filename, flg, ierr))
  if (flg) then
    PetscCallA(PetscOptionsInsertFileYAML(PETSC_COMM_WORLD, PETSC_NULL_OPTIONS, filename, PETSC_TRUE, ierr))
  end if
  PetscCallA(PetscOptionsView(PETSC_NULL_OPTIONS, PETSC_VIEWER_STDOUT_WORLD, ierr))
  PetscCallA(PetscOptionsAllUsed(PETSC_NULL_OPTIONS, n, ierr))
  PetscCallA(PetscFinalize(ierr))
end program ex10f90

!
!/*TEST
!
! testset:
!   test:
!      suffix: 1
!      args: -f petsc.yml -options_left 0
!      localrunfiles: petsc.yml
!
!   test:
!      suffix: 2
!      args: -options_file_yaml petsc.yml -options_left 0
!      localrunfiles: petsc.yml
!
!TEST*/
