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core/com.nokia.carbide.cpp.doc.user/html/concepts/precompiled_headers.htm
author fturovic <frank.turovich@nokia.com>
Wed, 17 Jun 2009 12:03:14 -0500
changeset 259 53dc199caef8
parent 0 fb279309251b
child 939 47d3ca29d054
child 1207 e265bbe56eb0
permissions -rw-r--r--
updated release notes and bug fixes for 2.1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
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<meta http-equiv="Content-Style-Type" content="text/css" />
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<meta name="LASTUPDATED" content="06/17/05 11:09:43" />
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<title>Precompiled Headers </title>
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<link rel="StyleSheet" href="../../book.css" type="text/css"/>
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</head>
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<body bgcolor="#FFFFFF">
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<h2>Precompiled Headers </h2>
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<p>Precompiled header support is available for Symbian OS projects that use the Nokia x86
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compiler. Precompiled header files use the <span class="code">.pch++ </span>extension and are only supported by emulator targets. </p>
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<p>By default, the x86 compiler compiles the <span class="code">.pch++</span> file before compiling any <span class="code">.cpp</span> files in a project. </p>
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<p>A precompiled header file (<span class="code">.pch++</span>) outputs to a new identically named file with the <span class="code">.mch</span> extension. For example, <span class="code">HelloWorld.pch++</span> outputs as <span class="code">HelloWorld.mch</span>. C++ source files must use the <span class="code">.pch++</span> extension.</p>
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<p>Listing 1 shows an example of a precompiled header source file called
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<span class="code">pch_test.pch++</span>.</p>
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<div class="listing">
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  <h4>Listing 1 .pch Precompiled Header example</h4>
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  <p class="listing">#include &lt;e32def.h&gt;<br />
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  #pragma precompile_target &quot;pch_test.mch&quot;<br />
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  <br />
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  #define FOO 1<br />
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  #define LATIDA 345</p>
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  <p class="listing">typedef struct foo<br />
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    {<br />
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&nbsp;&nbsp;&nbsp;&nbsp;int i, j, k, l, m;<br />
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&nbsp;&nbsp;&nbsp;&nbsp;char foobar[256];<br />
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} foo;</p>
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</div>
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<p>The resultant output file, <span class="code">pch_test.mch</span> can be included in other source or prefix files as:</p>
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<p class="listing"> #include pch_test.mch</p>
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<p>&nbsp;</p>
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<div id="footer">Copyright &copy; 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. <br>License: <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div>
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</body>













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</html>














FCL/sftools/dev/ide/carbidecpp