1: ! Tests calling PetscOptionsSetValue() before PetscInitialize(): Fortran Example
  2: #include <petsc/finclude/petscsys.h>
  3: program main
  4:   use petscsys

  6:   implicit none
  7:   PetscErrorCode :: ierr
  8:   PetscMPIInt  ::  rank, size
  9:   character(len=80) :: outputString

 11:   ! Every PETSc routine should begin with the PetscInitialize() routine.

 13:   PetscCallA(PetscOptionsSetValue(PETSC_NULL_OPTIONS, '-no_signal_handler', 'true', ierr))
 14:   PetscCallA(PetscInitialize(ierr))

 16:   ! We can now change the communicator universe for PETSc

 18:   PetscCallMPIA(MPI_Comm_size(MPI_COMM_WORLD, size, ierr))
 19:   PetscCallMPIA(MPI_Comm_rank(MPI_COMM_WORLD, rank, ierr))
 20:   write (outputString, *) 'Number of processors =', size, 'rank =', rank, '\n'
 21:   PetscCallA(PetscPrintf(PETSC_COMM_WORLD, outputString, ierr))
 22:   PetscCallA(PetscFinalize(ierr))
 23: end program main

 25: !/*TEST
 26: !
 27: !   test:
 28: !      requires: defined(PETSC_USE_LOG)
 29: !      nsize: 2
 30: !      args: -options_view -get_total_flops
 31: !      filter: grep -E -v "(Total flops)"
 32: !
 33: !TEST*/