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build/apache-ant-1.10.4/manual/sysclasspath.html

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+<html>
+
+<head>
+<meta http-equiv="Content-Language" content="en-us">
+<link rel="stylesheet" type="text/css" href="stylesheets/style.css">
+<title>build.sysclasspath</title>
+</head>
+
+<body>
+
+<h2 id="sysclasspath">build.sysclasspath</h2>
+<p>The value of the <code>build.sysclasspath</code> property
+controls how the system classpath, i.e. the classpath in effect when
+Apache Ant is run, affects the behavior of classpaths in Ant.
+The default behavior varies from task to task.</p>
+
+The values and their meanings are:
+
+<table>
+<tr><th scope="col">value</th><th scope="col">meaning</th></tr>
+<tr>
+<td>only</td>
+<td>Only the system classpath is used and classpaths specified in build files,
+etc are ignored. This situation could be considered as the person running
+the build file knows more about the environment than the person writing the
+build file.
+</td>
+</tr>
+
+<tr>
+<td>ignore</td>
+<td>
+The system classpath is ignored. This situation is the reverse of the
+above. The person running the build trusts the build file writer to get the
+build file right. This mode is recommended for portable scripts.
+</td>
+</tr>
+
+<tr>
+<td>last</td>
+<td>
+The classpath is concatenated to any specified classpaths at the end. This
+is a compromise, where the build file writer has priority.
+</td>
+</tr>
+
+<tr>
+<td>first</td>
+<td>
+Any specified classpaths are concatenated to the system classpath. This is
+the other form of compromise where the build runner has priority.
+</td>
+</tr>
+</table>
+
+<p><em>Since Ant 1.7</em> the value of this property also affects the
+bootclasspath settings&mdash;it combines the bootclasspath that has been
+specified for a task with the bootclasspath of the JVM running
+Ant.  If the property has not been set, it defaults to <q>ignore</q> in
+this case.</p>
+
+</body>
+</html>