digraph G {
  size="8,6"; ratio=fill; node[fontsize=24];

  ciafan->computefan; fan->increment; computefan->fan; stringdup->fatal;
  main->exit; main->interp_err; main->ciafan; main->fatal; main->malloc;
  main->strcpy; main->getopt; main->init_index; main->strlen; fan->fatal;
  fan->ref; fan->interp_err; ciafan->def; fan->free; computefan->stdprintf;
  computefan->get_sym_fields; fan->exit; fan->malloc; increment->strcmp;
  computefan->malloc; fan->stdsprintf; fan->strlen; computefan->strcmp;
  computefan->realloc; computefan->strlen; debug->sfprintf; debug->strcat;
  stringdup->malloc; fatal->sfprintf; stringdup->strcpy; stringdup->strlen;
  fatal->exit;

  subgraph "cluster_error.h" { label="error.h"; interp_err; }

  subgraph "cluster_sfio.h" { label="sfio.h"; sfprintf; }

  subgraph "cluster_ciafan.c" { label="ciafan.c"; ciafan; computefan;
  increment; }

  subgraph "cluster_util.c" { label="util.c"; stringdup; fatal; debug; }

  subgraph "cluster_query.h" { label="query.h"; ref; def; }

  subgraph "cluster_field.h" { get_sym_fields; }

  subgraph "cluster_stdio.h" { label="stdio.h"; stdprintf; stdsprintf; }

  subgraph "cluster_<libc.a>" { getopt; }

  subgraph "cluster_stdlib.h" { label="stdlib.h"; exit; malloc; free; realloc; }

  subgraph "cluster_main.c" { main; }

  subgraph "cluster_index.h" { init_index; }

  subgraph "cluster_string.h" { label="string.h"; strcpy; strlen; strcmp; strcat; }
}