Move all of NixOS to nixos/ in preparation of the repository merge

1 files changed, 21 insertions, 0 deletions

diff --git a/nixos/tests/mpich-example.c b/nixos/tests/mpich-example.c
new file mode 100644
index 00000000000..c48e3c45b72
--- /dev/null
+++ b/nixos/tests/mpich-example.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <mpi.h>
+
+int
+main (int argc, char *argv[])
+{
+  int rank, size, length;
+  char name[BUFSIZ];
+
+  MPI_Init (&argc, &argv);
+  MPI_Comm_rank (MPI_COMM_WORLD, &rank);
+  MPI_Comm_size (MPI_COMM_WORLD, &size);
+  MPI_Get_processor_name (name, &length);
+
+  printf ("%s: hello world from process %d of %d\n", name, rank, size);
+
+  MPI_Finalize ();
+
+  return EXIT_SUCCESS;
+}