### Eclipse Workspace Patch 1.0
#P org.eclipse.pde.build
Index: src/org/eclipse/pde/internal/build/IBuildPropertiesConstants.java
===================================================================
RCS file: /cvsroot/eclipse/pde/build/org.eclipse.pde.build/src/org/eclipse/pde/internal/build/IBuildPropertiesConstants.java,v
retrieving revision 1.56
diff -u -r1.56 IBuildPropertiesConstants.java
--- src/org/eclipse/pde/internal/build/IBuildPropertiesConstants.java	7 Apr 2010 20:06:10 -0000	1.56
+++ src/org/eclipse/pde/internal/build/IBuildPropertiesConstants.java	20 Apr 2010 20:03:53 -0000
@@ -62,6 +62,7 @@
 	public static final String PROPERTY_JAVAC_CUSTOM_ENCODINGS_PREFIX = "javacCustomEncodings."; //$NON-NLS-1$
 	public static final String PROPERTY_JAVAC_WARNINGS_PREFIX = "javacWarnings."; //$NON-NLS-1$
 	public static final String PROPERTY_JAVAC_ERRORS_PREFIX = "javacErrors."; //$NON-NLS-1$
+	public static final String PROPERTY_USE_PROJECT_WARNINGS = "javacWarnings.projectSettings"; //$NON-NLS-1$
 
 	public static final String DEFAULT_MATCH_ALL = "*"; //$NON-NLS-1$
 	public static final String DEFAULT_FINAL_SHAPE = "*"; //$NON-NLS-1$
@@ -141,4 +142,5 @@
 
 	public static final String PROPERTY_PACKAGER_MODE = "packagerMode"; //$NON-NLS-1$
 	public static final String PROPERTY_PACKAGER_AS_NORMALIZER = "packagerAsNormalizer"; //$NON-NLS-1$
+
 }
Index: src/org/eclipse/pde/internal/build/IPDEBuildConstants.java
===================================================================
RCS file: /cvsroot/eclipse/pde/build/org.eclipse.pde.build/src/org/eclipse/pde/internal/build/IPDEBuildConstants.java,v
retrieving revision 1.53
diff -u -r1.53 IPDEBuildConstants.java
--- src/org/eclipse/pde/internal/build/IPDEBuildConstants.java	1 Mar 2010 23:19:26 -0000	1.53
+++ src/org/eclipse/pde/internal/build/IPDEBuildConstants.java	20 Apr 2010 20:03:53 -0000
@@ -146,4 +146,7 @@
 	//container feature used in building .product files
 	public final static String CONTAINER_FEATURE = "org.eclipse.pde.build.container.feature"; //$NON-NLS-1$
 	public final static String UI_CONTAINER_FEATURE = "org.eclipse.pde.container.feature"; //$NON-NLS-1$
+
+	public final static String JDT_CORE_PREFS = ".settings/org.eclipse.jdt.core.prefs"; //$NON-NLS-1$
+	public final static String TOKEN_BASEDIR = "%BASEDIR%"; //$NON-NLS-1$
 }
Index: src/org/eclipse/pde/internal/build/ant/AntScript.java
===================================================================
RCS file: /cvsroot/eclipse/pde/build/org.eclipse.pde.build/src/org/eclipse/pde/internal/build/ant/AntScript.java,v
retrieving revision 1.70
diff -u -r1.70 AntScript.java
--- src/org/eclipse/pde/internal/build/ant/AntScript.java	21 Jan 2010 16:41:31 -0000	1.70
+++ src/org/eclipse/pde/internal/build/ant/AntScript.java	20 Apr 2010 20:03:53 -0000
@@ -1068,4 +1068,12 @@
 				return String.valueOf(c);
 		}
 	}
+
+	public void printReplaceTask(String file, String token, String value) {
+		Map arguments = new HashMap();
+		arguments.put("file", file); //$NON-NLS-1$
+		arguments.put("token", token); //$NON-NLS-1$
+		arguments.put("value", value); //$NON-NLS-1$
+		printElement("replace", arguments); //$NON-NLS-1$
+	}
 }
Index: src/org/eclipse/pde/internal/build/builder/ModelBuildScriptGenerator.java
===================================================================
RCS file: /cvsroot/eclipse/pde/build/org.eclipse.pde.build/src/org/eclipse/pde/internal/build/builder/ModelBuildScriptGenerator.java,v
retrieving revision 1.141
diff -u -r1.141 ModelBuildScriptGenerator.java
--- src/org/eclipse/pde/internal/build/builder/ModelBuildScriptGenerator.java	7 Apr 2010 20:06:10 -0000	1.141
+++ src/org/eclipse/pde/internal/build/builder/ModelBuildScriptGenerator.java	20 Apr 2010 20:03:53 -0000
@@ -1302,7 +1302,7 @@
 	 * @param javac
 	 * @param entry
 	 */
-	private void generateCompilerSettings(JavacTask javac, CompiledEntry entry, List classpath) {
+	private File generateCompilerSettings(JavacTask javac, CompiledEntry entry, List classpath) {
 		final String ADAPTER_ENCODING = "#ADAPTER#ENCODING#"; //$NON-NLS-1$
 		final String ADAPTER_ACCESS = "#ADAPTER#ACCESS#"; //$NON-NLS-1$
 
@@ -1310,10 +1310,10 @@
 		try {
 			properties = getBuildProperties();
 		} catch (CoreException e) {
-			return;
+			return null;
 		}
 		if (properties == null && classpath.size() == 0)
-			return;
+			return null;
 
 		String name = entry.getName(false);
 
@@ -1345,8 +1345,19 @@
 		String warningLevels = properties.getProperty(PROPERTY_JAVAC_WARNINGS_PREFIX + name);
 		String errorLevels = properties.getProperty(PROPERTY_JAVAC_ERRORS_PREFIX + name);
 
-		if (customEncodingsVal == null && warningLevels == null && errorLevels == null && classpath.size() == 0) {
-			return;
+		String projectWarningSettings = properties.getProperty(PROPERTY_USE_PROJECT_WARNINGS);
+		String warningPrefs = null;
+		if (Boolean.valueOf(projectWarningSettings).booleanValue()) {
+			//find default prefs file
+			if (new File(model.getLocation(), JDT_CORE_PREFS).exists())
+				warningPrefs = JDT_CORE_PREFS;
+		} else if (projectWarningSettings != null && !FALSE.equalsIgnoreCase(projectWarningSettings)) {
+			if (new File(model.getLocation(), projectWarningSettings).exists())
+				warningPrefs = projectWarningSettings;
+		}
+
+		if (customEncodingsVal == null && warningLevels == null && errorLevels == null && classpath.size() == 0 && warningPrefs == null) {
+			return null;
 		}
 
 		String root = getLocation(model);
@@ -1358,7 +1369,7 @@
 		try {
 			try {
 				//only create the file if we are going to write something in it
-				if (warningLevels != null || customEncodingsVal != null || errorLevels != null)
+				if (warningLevels != null || customEncodingsVal != null || errorLevels != null || warningPrefs != null)
 					writer = new BufferedWriter(new FileWriter(file));
 
 				if (warningLevels != null) {
@@ -1369,6 +1380,9 @@
 					writer.write("-err:" + errorLevels + "\n"); //$NON-NLS-1$ //$NON-NLS-2$
 				}
 
+				if (warningPrefs != null)
+					writer.write("-properties \"" + TOKEN_BASEDIR + '/' + warningPrefs + "\"\n"); //$NON-NLS-1$ //$NON-NLS-2$
+
 				if (customEncodingsVal != null) {
 					String[] encodings = customEncodingsVal.split(","); //$NON-NLS-1$
 					if (encodings.length > 0) {
@@ -1407,6 +1421,7 @@
 		} catch (IOException e1) {
 			//ignore
 		}
+		return file;
 	}
 
 	/**
@@ -1461,7 +1476,6 @@
 				}
 			}
 		} else {
-			script.printComment("compile the source code"); //$NON-NLS-1$
 			JavacTask javac = new JavacTask();
 			javac.setClasspathId(name + PROPERTY_CLASSPATH);
 			javac.setBootClasspath(Utils.getPropertyFormat(PROPERTY_BUNDLE_BOOTCLASSPATH));
@@ -1477,8 +1491,12 @@
 			javac.setLogExtension(Utils.getPropertyFormat(PROPERTY_LOG_EXTENSION));
 			if (generateErrorPropertyAttribute)
 				javac.setErrorProperty(PROPERTY_COMPILATION_ERROR);
-			generateCompilerSettings(javac, entry, classpath);
 
+			File argFile = generateCompilerSettings(javac, entry, classpath);
+			if (argFile != null)
+				script.printReplaceTask(Utils.getPropertyFormat(PROPERTY_BASEDIR) + '/' + argFile.getName(), TOKEN_BASEDIR, Utils.getPropertyFormat(PROPERTY_BASEDIR));
+
+			script.printComment("compile the source code"); //$NON-NLS-1$
 			script.print(javac);
 		}