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<h2>
<a name="1222776"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">8.3 C++ improvements</font>
</h2><hr>
<p>
<a name="1222905"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">There have been significant improvements to the C++ system since R1.9.6. The sections below detail the areas that have changed.</font>
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<h3>
<a name="1222913"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">8.3.1 Footprint reduction</font>
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<p>
<a name="1222914"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Some users may experience a reduction in the footprint size of a binary built from C++ sources. A significant reduction in the size of the BSS section has been observed in some applications.</font>
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<h3>
<a name="1220798"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">8.3.2 Template support </font>
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<a name="1220799"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Templates are enabled by default. </font>
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<p>
<a name="1221036"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><em>Note: When a C++ template file is compiled, <strong>st20cc</strong> creates a temporary <font size=2 face=Courier><strong>.ti</strong></font> (template information) file, containing object names. This is used internally to link with libraries having the same instantiated objects. <font size=2 face=Courier><strong>.ti</strong></font> files should be ignored, and may safely be deleted after compilation.</em></font>
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<h3>
<a name="1220800"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">8.3.3 Exception handling support</font>
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<p>
<a name="1220801"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Exception handling is enabled by using the <font size=2 face=Courier><strong>-exceptions</strong></font> options for <strong>st20cc</strong>. If exception handling is required this should be applied for the compilation phase and the link phase.</font>
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<p>
<a name="1220803"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><b>Important</b></font>
<br>
<dl><dl> <dl>
<dt> <a name="1221074"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Code for interrupt handlers and high priority tasks must be placed in a compilation unit that is compiled without exception handling enabled.</font>
</dl>
</dl></dl>
<h3>
<a name="1220806"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">8.3.4 C++ Standard Libraries (supported with and without exceptions enabled)</font>
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<p>
<a name="1220807"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">The C++ libraries, which include the Standard Template Library (STL) and iostreams, are shipped with this release.</font>
</p>
<p>
<a name="1220809"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">An embedded version of the C++ libraries, which is aimed at the EC++ specification, and is considerably smaller and simpler than the full version, is also shipped. This may be used instead of the ISO/IEC 14882 default version by supplying the <font size=2 face=Courier><strong>-ec++stl</strong></font> option to <strong>st20cc</strong>. As with the full version, this embedded version may be used with or without exceptions enabled. </font>
</p>
<p>
<a name="1220810"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">New directories have been added under the include area of the release to contain headers for the C++ libraries.</font>
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<h3>
<a name="1220811"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">8.3.5 Compiler-generated section names</font>
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<p>
<a name="1220812"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">For implementation reasons, the compiler provides unique section names for some template code and external inline candidates (these names will be prefixed with <font size=2 face=Courier><strong>_ _template_ _</strong></font> or <font size=2 face=Courier><strong>_ _ei_ _</strong></font> followed by a mangled version of the symbol name the section contains). Regular expression notation may be used for placement of these sections if manual placement is required. </font>
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<p>
<a name="1220815"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">See <a href="main43.htm#1220938"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Section⌨️ 快捷键说明
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