### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: batch/org/eclipse/jdt/internal/compiler/batch/Main.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/batch/org/eclipse/jdt/internal/compiler/batch/Main.java,v
retrieving revision 1.365
diff -u -r1.365 Main.java
--- batch/org/eclipse/jdt/internal/compiler/batch/Main.java	28 Jul 2011 17:07:36 -0000	1.365
+++ batch/org/eclipse/jdt/internal/compiler/batch/Main.java	18 Aug 2011 17:20:33 -0000
@@ -2199,6 +2199,10 @@
 						disableWarnings();
 						continue;
 					}
+					if (length == 9 && warningOption.equals("-warn:all")) { //$NON-NLS-1$
+						enableAllWarnings();
+						continue;
+					}
 					if (length <= 6) {
 						throw new IllegalArgumentException(
 							this.bind("configure.invalidWarningConfiguration", warningOption)); //$NON-NLS-1$
@@ -2838,6 +2842,20 @@
 	}
 	this.options.put(CompilerOptions.OPTION_TaskTags, Util.EMPTY_STRING);
 }
+protected void enableAllWarnings() {
+	Object[] entries = this.options.entrySet().toArray();
+	for (int i = 0, max = entries.length; i < max; i++) {
+		Map.Entry entry = (Map.Entry) entries[i];
+		if (!(entry.getKey() instanceof String))
+			continue;
+		if (!(entry.getValue() instanceof String))
+			continue;
+		if (((String) entry.getValue()).equals(CompilerOptions.IGNORE)) {
+			this.options.put(entry.getKey(), CompilerOptions.WARNING);
+		}
+	}
+	this.options.put(CompilerOptions.OPTION_TaskTags, Util.EMPTY_STRING);
+}
 protected void disableErrors() {
 	Object[] entries = this.options.entrySet().toArray();
 	for (int i = 0, max = entries.length; i < max; i++) {