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<h2>
<a name="1205191"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">global</font>
</h2><hr>
<p>
<a name="1242557"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Define symbol as global</font>
</p>
<h3>
<a name="1205192"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Syntax</font>
</h3>
<a name="1205193"> </a><font size=2 face=Courier><strong>global <font size=2 face=Courier><strong><em>symbol</em></strong></font> [realname <font size=2 face=Courier><strong><em>string</em></strong></font>] [origin <font size=2 face=Courier><strong><em>string</em></strong></font>] [datausage]<br>牋牋牋牋牋牋牋燵routineusage] [notypeusage] [commonusage]<br></strong></font>
<h3>
<a name="1205194"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
</h3>
<p>
<a name="1205195"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The <font size=2 face=Courier><strong>global</strong></font> directive is used to cause a <font size=2 face=Courier><strong><em>symbol</em></strong></font> to become available outside the current module. It causes the <font size=2 face=Courier><strong><em>symbol</em></strong></font> to become globally visible so that it can be accessed by the linker. The operand to a <font size=2 face=Courier><strong>global</strong></font> directive, that is the <font size=2 face=Courier><strong><em>symbol</em></strong></font>, may be a code or data symbol, but it <strong>must not</strong> be a symbol defined by the <font size=2 face=Courier><strong>defsym</strong></font> directive. The <font size=2 face=Courier><strong>global</strong></font> directive can appear before the definition of its operand.</font>
</p>
<p>
<a name="1205196"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The name used for the symbol in the object file is the same as the name of the symbol in the assembly source file, unless <font size=2 face=Courier><strong>realname</strong></font> is specified. In this case the name used for the symbol in the object file is the name specified by the string argument to <font size=2 face=Courier><strong>realname</strong></font>.</font>
</p>
<p>
<a name="1205197"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><font size=2 face=Courier><strong>origin</strong></font> enables an origin to be specified for the symbol in the object file. This allows the linker to ensure that only a reference to a symbol with the same name and the same origin matches this symbol. If <font size=2 face=Courier><strong>origin</strong></font> is not specified, then the symbol in the object file is not given a specific origin. The linker can match this symbol to a symbol with the same name and any origin.</font>
</p>
<p>
<a name="1205198"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The four optional arguments <font size=2 face=Courier><strong>datausage</strong></font>, <font size=2 face=Courier><strong>routineusage</strong></font>, <font size=2 face=Courier><strong>notypeusage </strong></font>and <font size=2 face=Courier><strong>commonusage</strong></font> generate extra symbol information in the object file which can be incorporated by the linker into a symbol table. This may be used by tools such as a debugger or profiler, when reading symbol information.</font>
</p>
<p>
<a name="1205199"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><b><font size=2 face=Courier><strong>datausage</strong></font></b></font>
<br>
<dl><dl> <dl>
<dt> <a name="1240495"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Indicates that the symbol is associated with a data object.</font>
</dl>
</dl></dl>
<p>
<a name="1229439"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><b><font size=2 face=Courier><strong>routineusage</strong></font></b></font>
<br>
<dl><dl> <dl>
<dt> <a name="1240496"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Indicates that the symbol is associated with a routine.</font>
</dl>
</dl></dl>
<p>
<a name="1229441"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><b><font size=2 face=Courier><strong>notypeusage</strong></font></b></font>
<br>
<dl><dl> <dl>
<dt> <a name="1240497"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Indicates that the symbol type (data or routine) is not specified.</font>
</dl>
</dl></dl>
<p>
<a name="1205202"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><b><font size=2 face=Courier><strong>commonusage</strong></font></b></font>
<br>
<dl><dl> <dl>
<dt> <a name="1240498"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Indicates to the linker that the symbol is a tentative definition; see <a href="impdet6.htm#1204986"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Section⌨️ 快捷键说明
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