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95 lines
5.2 KiB
95 lines
5.2 KiB
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<title>The 10 minute guide to using qmake</title>
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<a href="index.html">
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<font color="#004faf">Home</font></a>
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<font color="#004faf">All Classes</font></a>
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<font color="#004faf">Main Classes</font></a>
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<font color="#004faf">Annotated</font></a>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><p align="right">[<a href="qmake-manual-2.html">Prev: Installing qmake</a>] [<a href="qmake-manual.html">Home</a>] [<a href="qmake-manual-4.html">Next: qmake Tutorial</a>]</p>
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<h2 align="center">The 10 minute guide to using qmake</h2>
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<h3><a name="1"></a>Creating a project file</h3>
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<p><em>qmake</em> uses information stored in project (.pro) files to determine what should go in the makefiles it generates.</p>
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<p>A basic project file contains information about the application, for example, which files are needed to compile the application, and which configuration settings to use.</p>
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<p>Here's a simple example project file:</p>
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<pre>
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SOURCES = hello.cpp
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HEADERS = hello.h
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CONFIG += qt warn_on release
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</pre>
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<p>We'll provide a brief line-by-line explanation, deferring the detail until later on in the manual.</p>
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<pre>
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SOURCES = hello.cpp
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</pre>
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<p>This line specifies the source files that implement the application. In this case there is just one file, <em>hello.cpp</em>. Most applications require multiple files; this situation is dealt with by listing all the files on the same line space separated, like this:</p>
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<pre>
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SOURCES = hello.cpp main.cpp
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</pre>
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<p>Alternatively, each file can be listed on a separate line, by escaping the newlines, like this:</p>
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<pre>
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SOURCES = hello.cpp \
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main.cpp
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</pre>
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<p>A more verbose approach is to list each file separately, like this:</p>
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<pre>
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SOURCES += hello.cpp
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SOURCES += main.cpp
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</pre>
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<p>This approach uses "+=" rather than "=" which is safer, because it always adds a new file to the existing list rather than replacing the list.</p>
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<p>The HEADERS line is used to specify the header files created for use by the application, e.g.</p>
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<pre>
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HEADERS += hello.h
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</pre>
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<p>Any of the approaches used to list source files may be used for header files.</p>
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<p>The CONFIG line is used to give <em>qmake</em> information about the application's configuration.</p>
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<pre>
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CONFIG += qt warn_on release
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</pre>
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<p>The "+=" is used here, because we add our configuration options to any that are already present. This is safer than using "=" which replaces all options with just those specified.</p>
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<p>The <em>qt</em> part of the CONFIG line tells <em>qmake</em> that the application is built using TQt. This means that <em>qmake</em> will link against the TQt libraries when linking and add in the neccesary include paths for compiling.</p>
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<p>The <em>warn_on</em> part of the CONFIG line tells <em>qmake</em> that it should set the compiler flags so that warnings are output.</p>
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<p>The <em>release</em> part of the CONFIG line tells <em>qmake</em> that the application must be built as a release application. During development, programmers may prefer to replace <em>release</em> with <em>debug</em>, which is discussed later.</p>
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<p>Project files are plain text (i.e. use an editor like notepad, vim or xemacs) and must be saved with a '.pro' extension. The name of the application's executable will be the same as the project file's name, but with an extension appropriate to the platform. For example, a project file called 'hello.pro' will produce 'hello.exe' on Windows and 'hello' on Unix.</p>
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<h3><a name="2"></a>Generating a makefile</h3>
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<p>When you have created your project file it is very easy to generate a makefile, all you need to do is go to where you have created your project file and type:</p>
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<p>Makefiles are generated from the '.pro' files like this:</p>
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<pre>
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qmake -o Makefile hello.pro
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</pre>
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<p>For Visual Studio users, <em>qmake</em> can also generate '.dsp' files, for example:</p>
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<pre>
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qmake -t vcapp -o hello.dsp hello.pro
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</pre>
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<!-- eof -->
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<p align="right">[<a href="qmake-manual-2.html">Prev: Installing qmake</a>] [<a href="qmake-manual.html">Home</a>] [<a href="qmake-manual-4.html">Next: qmake Tutorial</a>]</p>
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<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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