Passed as flags parameter to: 
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#define  | CHART_PRINT_NAMES   0x1000 | 
|   | print labels for each block? 
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#define  | CHART_GEN_DOT   0x2000 | 
|   | generate .dot file (file extension is forced to .dot) 
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#define  | CHART_GEN_GDL   0x4000 | 
|   | generate .gdl file (file extension is forced to .gdl) 
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#define  | CHART_WINGRAPH   0x8000 | 
|   | call grapher to display the graph 
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