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<a name="1204938"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">12.3.2 Predefinitions</font>
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<a name="1204939"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Certain macros which identify global information, and some function names, are automatically recognized by <strong>st20cc</strong>. Generally, these items can be referenced directly in C programs and do not need to be declared.</font>
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<a name="1204946"> </a><i><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Macro names</font></i>
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<a name="1204947"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">All predefined macro names defined by the ISO (ANSI) standard are present; they are:
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<caption><b><i><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1209944"> </a><font face="Helvetica">Table 39: ISO (ANSI) predefined macros</font></font></i></b></caption>
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<th><font face="Verdana, Arial, Helvetica, sans-serif" color="#003366"><a name="1209948"> </a><font face="Verdana, Arial, Helvetica, sans-serif">Macro name</font></font></th>
<th><font face="Verdana, Arial, Helvetica, sans-serif" color="#003366"><a name="1209950"> </a><font face="Verdana, Arial, Helvetica, sans-serif">Description</font></font></th>
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<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204950"> </a><div ><font size=2><font size=2 face=Courier><strong>_ _DATE_ _</strong></font></font></div></font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204952"> </a><div ><font size=2>The date of compilation of the source file</font></div></font></td>
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<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204954"> </a><div ><font size=2><font size=2 face=Courier><strong>_ _FILE_ _</strong></font></font></div></font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204956"> </a><div ><font size=2>The name of the current source file</font></div></font></td>
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<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204958"> </a><div ><font size=2><font size=2 face=Courier><strong>_ _LINE_ _</strong></font></font></div></font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204960"> </a><div ><font size=2>The line number of the current line of source</font></div></font></td>
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<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204962"> </a><div ><font size=2><font size=2 face=Courier><strong>_ _STDC_ _</strong></font></font></div></font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204964"> </a><div ><font size=2>The decimal constant "1" showing the implementation conforms to ISO (ANSI) C</font></div></font></td>
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<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204966"> </a><div ><font size=2><font size=2 face=Courier><strong>_ _TIME_ _</strong></font></font></div></font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204968"> </a><div ><font size=2>The time of compilation of the source file</font></div></font></td>
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<a name="1205011"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The following STMicroelectronics macro names are also defined:
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<caption><b><i><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1205008"> </a><font face="Helvetica">Table 40: st20cc STMicroelectronics predefined macros</font></font></i></b></caption>
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<th><font face="Verdana, Arial, Helvetica, sans-serif" color="#003366"><a name="1207491"> </a><font face="Verdana, Arial, Helvetica, sans-serif">Macro constant</font></font></th>
<th><font face="Verdana, Arial, Helvetica, sans-serif" color="#003366"><a name="1207493"> </a><font face="Verdana, Arial, Helvetica, sans-serif">Description</font></font></th>
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<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204975"> </a><div ><font size=2><font size=2 face=Courier><strong>_ICC</strong></font></font></div></font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204977"> </a><div ><font size=2>STMicroelectronics ISO (ANSI) C compiler.</font></div><a name="1204978"> </a><div ><font size=2>Set to decimal constant <font size=2 face=Courier><strong>1</strong></font>.</font></div></font></td>
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<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204980"> </a><div ><font size=2><font size=2 face=Courier><strong>_ _CC_NORCROFT</strong></font></font></div></font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204982"> </a><div ><font size=2>Derived from the Norcroft C compiler. Set to decimal constant <font size=2 face=Courier><strong>1</strong></font>.</font></div></font></td>
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<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204984"> </a><div ><font size=2><font size=2 face=Courier><strong>_ _CORE_ _</strong></font></font></div></font></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif"><a name="1204986"> </a><div ><font size=2>Indicates the target processor. Takes the following values:</font></div><a name="1204987"> </a><div ><font size=2><font size=2 face=Courier><strong>-1</strong></font> No meaning, dummy value</font></div><a name="1204988"> </a><div ><font size=2><font size=2 face=Courier><strong>⌨️ 快捷键说明
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