libjava/gnu/classpath/Configuration.java

   1 /* Configuration.java --
   2    Copyright (C) 1998, 2001, 2003, 2005, 2006, 2007, 2008
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GNU Classpath.
   6
   7 GNU Classpath is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU Classpath is distributed in the hope that it will be useful, but
  13 WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Classpath; see the file COPYING.  If not, write to the
  19 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20 02110-1301 USA.
  21
  22 Linking this library statically or dynamically with other modules is
  23 making a combined work based on this library.  Thus, the terms and
  24 conditions of the GNU General Public License cover the whole
  25 combination.
  26
  27 As a special exception, the copyright holders of this library give you
  28 permission to link this library with independent modules to produce an
  29 executable, regardless of the license terms of these independent
  30 modules, and to copy and distribute the resulting executable under
  31 terms of your choice, provided that you also meet, for each linked
  32 independent module, the terms and conditions of the license of that
  33 module.  An independent module is a module which is not derived from
  34 or based on this library.  If you modify this library, you may extend
  35 this exception to your version of the library, but you are not
  36 obligated to do so.  If you do not wish to do so, delete this
  37 exception statement from your version. */
  38
  39 package gnu.classpath;
  40
  41 /**
  42  * This file defines compile-time constants that can be accessed by
  43  * java code. It is pre-processed by configure.
  44  */
  45 public final class Configuration
  46 {
  47   private Configuration()
  48   {
  49   }
  50
  51   private static native String classpath_home();
  52   private static native boolean debug();
  53   private static native String toolkit();
  54   private static native String ecj();
  55
  56   /**
  57    * The value of CLASSPATH_HOME is the location that the classpath
  58    * libraries and support files where installed in. It is set according to
  59    * the argument for --prefix given to configure and used to set the
  60    * System property gnu.classpath.home.
  61    */
  62   public static final String CLASSPATH_HOME = classpath_home();
  63
  64   /**
  65    * The release version number of GNU Classpath.
  66    * It is set according to the value of 'version' in the configure[.in] file
  67    * and used to set the System property gnu.classpath.version.
  68    */
  69   public static final String CLASSPATH_VERSION = "0.99";
  70
  71   /**
  72    * The value of DEBUG is substituted according to whether the
  73    * "--enable-debug" argument was passed to configure. Code
  74    * which is made conditional based on the value of this flag - typically
  75    * code that generates debugging output - will be removed by the optimizer
  76    * in a non-debug build.
  77    */
  78   public static final boolean DEBUG = debug();
  79
  80   /**
  81    * The value of LOAD_LIBRARY is substituted according to whether the
  82    * "--enable-load-library" or "--disable-load-library" argument was passed
  83    * to configure.  By default, configure should define this is as true.
  84    * If set to false, loadLibrary() calls to load native function
  85    * implementations, typically found in static initializers of classes
  86    * which contain native functions, will be omitted.  This is useful for
  87    * runtimes which pre-link their native function implementations and do
  88    * not require additional shared libraries to be loaded.
  89    */
  90   public static final boolean INIT_LOAD_LIBRARY = false;
  91
  92   /**
  93    * Name of default AWT peer library.
  94    */
  95   public static final String default_awt_peer_toolkit = toolkit();
  96
  97   /**
  98    * Whether to automatically run the init* methods in java.lang.System
  99    * (the default) at class initialization time or whether to have the VM
 100    * explicitly invoke them.
 101    *
 102    * The default is false, meaning the VM does not explicitly run the
 103    * initializers.
 104    *
 105    */
 106   public static final boolean JAVA_LANG_SYSTEM_EXPLICIT_INITIALIZATION = false;
 107
 108   /**
 109    * The Eclipse Java Compiler jar file for use by the
 110    * com.sun.tools.javac implementation in tools.zip.
 111    */
 112   public static final String ECJ_JAR = ecj();
 113
 114   /**
 115    * Set to <code>true</code> if the config script found that (a) an
 116    * implementation of java.math.BigInteger, based on the GNU MP library, is
 117    * desired in preference to a pure Java one, and (b) the GNU MP library was
 118    * found on the platform where the JVM is to run. Otherwise, this field is
 119    * set to <code>false</code>.
 120    */
 121   public static final boolean WANT_NATIVE_BIG_INTEGER = true;
 122 }