obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 87 insertions, 0 deletions

diff --git a/gcc/testsuite/objc.dg/property/at-property-25.m b/gcc/testsuite/objc.dg/property/at-property-25.m
new file mode 100644
index 000000000..422a29e55
--- /dev/null
+++ b/gcc/testsuite/objc.dg/property/at-property-25.m
@@ -0,0 +1,87 @@
+/* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
+/* { dg-do compile } */
+
+/* Test warnings and non-warnings with @optional @properties.  */
+
+#include <stdlib.h>
+#include <objc/objc.h>
+#include <objc/runtime.h>
+
+@interface MyRootClass
+{
+  Class isa;
+}
++ (id) initialize;
++ (id) alloc;
+- (id) init;
+@end
+
+@implementation MyRootClass
++ (id) initialize { return self; }
++ (id) alloc { return class_createInstance (self, 0); }
+- (id) init { return self; }
+@end
+
+@protocol count
+@optional
+@property int count1;
+@property (readonly) int count2;
+@end
+
+
+/* A class that implements all the properties.  */
+@interface MySubClass1 : MyRootClass <count>
+{
+  int count1;
+  int count2;
+}
+@end
+
+@implementation MySubClass1
+@synthesize count1;
+@synthesize count2;
+@end
+
+
+/* A class that implements nothing; no warnings as the properties are
+   all optional.  */
+@interface MySubClass2 : MyRootClass <count>
+@end
+
+@implementation MySubClass2
+@end
+
+
+@protocol count2
+@required
+@property int count1;
+@property (readonly) int count2;
+@end
+
+/* A class that implements all the properties.  */
+@interface MySubClass3 : MyRootClass <count2>
+{
+  int count1;
+  int count2;
+}
+@end
+
+@implementation MySubClass3
+@synthesize count1;
+@synthesize count2;
+@end
+
+
+/* A class that implements nothing; warnings as the properties are
+   all required.  */
+@interface MySubClass4 : MyRootClass <count2>
+@end
+
+@implementation MySubClass4
+@end
+
+/* { dg-warning "incomplete implementation of class" "" { target *-*-* } 81 } */
+/* { dg-warning "method definition for ..setCount1:. not found" "" { target *-*-* } 81 } */
+/* { dg-warning "method definition for ..count1. not found" "" { target *-*-* } 81 } */
+/* { dg-warning "method definition for ..count2. not found" "" { target *-*-* } 81 } */
+/* { dg-warning "class .MySubClass4. does not fully implement the .count2. protocol" "" { target *-*-* } 81 } */