Actual source code: ex16.c
2: static char help[] = "Tests calling PetscOptionsSetValue() before PetscInitialize()\n\n";
4: #include <petscsys.h>
5: int main(int argc, char **argv)
6: {
7: PetscMPIInt rank, size;
9: /*
10: Every PETSc routine should begin with the PetscInitialize() routine.
11: argc, argv - These command line arguments are taken to extract the options
12: supplied to PETSc and options supplied to MPI.
13: help - When PETSc executable is invoked with the option -help,
14: it prints the various options that can be applied at
15: runtime. The user can use the "help" variable place
16: additional help messages in this printout.
18: Since when PetscInitialize() returns with an error the PETSc data structures
19: may not be set up hence we cannot call PetscCall() hence directly return the error code.
21: Since PetscOptionsSetValue() is called before the PetscInitialize() we cannot call
22: PetscCall() on the error code and just return it directly.
23: */
24: PetscOptionsSetValue(NULL, "-no_signal_handler", "true");
26: PetscInitialize(&argc, &argv, (char *)0, help);
27: MPI_Comm_size(PETSC_COMM_WORLD, &size);
28: MPI_Comm_rank(PETSC_COMM_WORLD, &rank);
29: PetscPrintf(PETSC_COMM_WORLD, "Number of processors = %d, rank = %d\n", size, rank);
30: PetscFinalize();
31: return 0;
32: }
34: /*TEST
36: test:
37: requires: defined(PETSC_USE_LOG)
38: nsize: 2
39: args: -options_view -get_total_flops
40: filter: grep -E -v "(cuda_initialize|Total flops|options_left)"
42: TEST*/