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<title>4.15 External reference data: option -X</title>
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<a name="1213481"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">4.15 External reference data: option -X</font>
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<a name="1205093"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">This option displays a list of all the code and data symbols imported by the modules specified to the lister, that is it lists their external references. External references are references to separately compiled units. For C programs the option also displays any external references to globally visible data.</font>
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<a name="1205094"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The output from this option is in a tabular format. It consists of a list of external references and their associated modules. The following information is displayed:</font>
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<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1205095"> </a>external reference, that is, the name of the separately compiled unit,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1205096"> </a>the name of the module in which the external reference exists,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1209887"> </a>language used,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1209889"> </a>target processor,</font></p>
<p> <font size=2 face="Verdana, Arial, Helvetica, sans-serif"><li ><a name="1205099"> </a>error mode - this should always be "<font size=2 face=Courier><strong>X</strong></font>" for C programs.</font></p>
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<h3>
<a name="1205105"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Example external reference data display</font>
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