| author | fturovic <frank.turovich@nokia.com> |
| Fri, 16 Apr 2010 09:51:37 -0500 | |
| branch | RCL_2_4 |
| changeset 1225 | a546534a48de |
| parent 939 | 47d3ca29d054 |
| permissions | -rw-r--r-- |
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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 <e32def.h><br /> |
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#pragma precompile_target "pch_test.mch"<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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int i, j, k, l, m;<br /> |
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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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<div id="footer">Copyright © 2010 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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DP tools release version Revision: 200912
Deepak Modgil <Deepak.Modgil@Nokia.com>
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</html> |