1 2 static char help[] = "Tests calling PetscOptionsSetValue() before PetscInitialize()\n\n"; 3 4 #include <petscsys.h> 5 int main(int argc, char **argv) { 6 PetscMPIInt rank, size; 7 8 /* 9 Every PETSc routine should begin with the PetscInitialize() routine. 10 argc, argv - These command line arguments are taken to extract the options 11 supplied to PETSc and options supplied to MPI. 12 help - When PETSc executable is invoked with the option -help, 13 it prints the various options that can be applied at 14 runtime. The user can use the "help" variable place 15 additional help messages in this printout. 16 17 Since when PetscInitialize() returns with an error the PETSc data structures 18 may not be set up hence we cannot call PetscCall() hence directly return the error code. 19 20 Since PetscOptionsSetValue() is called before the PetscInitialize() we cannot call 21 PetscCall() on the error code and just return it directly. 22 */ 23 PetscCall(PetscOptionsSetValue(NULL, "-no_signal_handler", "true")); 24 PetscFunctionBeginUser; 25 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 26 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size)); 27 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank)); 28 PetscCall(PetscPrintf(PETSC_COMM_WORLD, "Number of processors = %d, rank = %d\n", size, rank)); 29 PetscCall(PetscFinalize()); 30 return 0; 31 } 32 33 /*TEST 34 35 test: 36 requires: defined(PETSC_USE_LOG) 37 nsize: 2 38 args: -options_view -get_total_flops 39 filter: egrep -v "(cuda_initialize|Total flops|options_left)" 40 41 TEST*/ 42