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<html>
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<head>
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<title>external.html</title>
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<body bgcolor=beige>
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<! End Style Sheet Header -----------Insert Text Here --------------------->
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<center>
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<h1>External Libraries</h1>
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<font color=red>S</font>oftware <font color=red>C</font>onfiguration,
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<font color=red>R</font>elease <font color=red>A</font>nd
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<font color=red>M</font>anagement
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</center>
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<hr>
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<ol>
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<h2>The <External> Tag</h2>
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Use<p>
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<font color="green">
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<External ref=<em>Tool_name</em> [use=<em>group name</em>]>
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</font><p>
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This tag is used to specify the dependency on an external tool, such as a
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library package etc. The name of the tool must refer to one of the tools defined
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in your areas configuration.
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<p>
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The optional <b>use=</b> element can be specified where the
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<a href=export.html><export></a> interface has been defined in another
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SCRAM managed project. i.e. It allows you to choose subsets of the libraries
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from other SCRAM projects as if you were using a <use> tag in your local
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project.
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<p>
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Note that if the used interface itself specifies an <External> tag then the
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specified tool still has to exist in the local configuration.
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<h2>Example 1</h2>
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You are working in your local project and wish to link against the X11 libraries
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<br>
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Assuming X11 is part of your project environment you can simply
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Edit your BuildFile and add the line
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<p>
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<font color="green">
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<External ref=X11>
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</font>
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<p>
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<h2>Example 2</h2>
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You now wish to work with another SCRAM based project called "foo".
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If you proceed as in the
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previous example you are likely to get all possible libraries.
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<p>
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You know however that you are only interested in the libraries for the subsystem
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"bar", then (again assuming your project configuration knows about "foo") add
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this to your BuildFile
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<p>
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<font color="green">
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<External ref=foo use=bar>
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</font>
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</ol>
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<! Style Sheet Footer ---------------Do not change anything after this line-->
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<hr>
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<table border=1 width=100%>
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<td align=left>
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<a href=mailto:Christopher.Williams@cern.ch
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>Chris Williams</a>
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</td>
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<td align=center>
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<script language="JavaScript">
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<!---//hide script from old browsers
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document.write( "<br>Last updated "+ document.lastModified
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</script>
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</td>
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<td align=right>Show <a href=/cgi-cmc/pagestat>Stats</a>
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</table>
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