From: Iain Sandoe <iain@sandoe.co.uk>
Date: Thu, 12 Nov 2020 13:11:11 +0000 (+0000)
Subject: Objective-C [2/3] : Implement Wobjc-root-class [PR77404].
X-Git-Tag: basepoints/gcc-12~3287
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d35fbf7f7673b5c72ee61720f1a209d4e798152f;p=thirdparty%2Fgcc.git

Objective-C [2/3] : Implement Wobjc-root-class [PR77404].

Add "Wno-objc-root-class" to tests in the Objective-C suite where
needed.

gcc/testsuite/ChangeLog:

	PR objc/77404
	* objc.dg/anon-1.m: Add Wno-objc-root-class.
	* objc.dg/attributes/class-attribute-1.m: Likewise.
	* objc.dg/attributes/class-attribute-2.m: Likewise.
	* objc.dg/attributes/class-attribute-3.m: Likewise.
	* objc.dg/attributes/method-deprecated-1.m: Likewise.
	* objc.dg/attributes/method-deprecated-2.m: Likewise.
	* objc.dg/attributes/method-deprecated-3.m: Likewise.
	* objc.dg/attributes/method-format-1.m: Likewise.
	* objc.dg/attributes/method-nonnull-1.m: Likewise.
	* objc.dg/attributes/method-noreturn-1.m: Likewise.
	* objc.dg/attributes/method-sentinel-1.m: Likewise.
	* objc.dg/attributes/nsobject-01.m: Likewise.
	* objc.dg/attributes/objc-exception-1.m: Likewise.
	* objc.dg/attributes/parameter-attribute-1.m: Likewise.
	* objc.dg/attributes/parameter-attribute-2.m: Likewise.
	* objc.dg/attributes/proto-attribute-1.m: Likewise.
	* objc.dg/attributes/proto-attribute-2.m: Likewise.
	* objc.dg/attributes/proto-attribute-3.m: Likewise.
	* objc.dg/attributes/proto-attribute-4.m: Likewise.
	* objc.dg/bitfield-2.m: Likewise.
	* objc.dg/break-in-ifstmt.m: Likewise.
	* objc.dg/class-1.m: Likewise.
	* objc.dg/class-extension-1.m: Likewise.
	* objc.dg/class-extension-2.m: Likewise.
	* objc.dg/class-extension-3.m: Likewise.
	* objc.dg/class-extension-4.m: Likewise.
	* objc.dg/class-protocol-1.m: Likewise.
	* objc.dg/comp-types-7.m: Likewise.
	* objc.dg/demangle-1.m: Likewise.
	* objc.dg/duplicate-class-1.m: Likewise.
	* objc.dg/encode-6-next.m: Likewise.
	* objc.dg/encode-6.m: Likewise.
	* objc.dg/enhanced-proto-2.m: Likewise.
	* objc.dg/exceptions-1.m: Likewise.
	* objc.dg/exceptions-3.m: Likewise.
	* objc.dg/exceptions-4.m: Likewise.
	* objc.dg/exceptions-5.m: Likewise.
	* objc.dg/fobjc-std-1.m: Likewise.
	* objc.dg/foreach-2.m: Likewise.
	* objc.dg/foreach-4.m: Likewise.
	* objc.dg/foreach-5.m: Likewise.
	* objc.dg/fsyntax-only.m: Likewise.
	* objc.dg/gnu-api-2-class-meta.m: Likewise.
	* objc.dg/gnu-api-2-class.m: Likewise.
	* objc.dg/gnu-api-2-ivar.m: Likewise.
	* objc.dg/gnu-api-2-method.m: Likewise.
	* objc.dg/gnu-api-2-objc.m: Likewise.
	* objc.dg/gnu-api-2-objc_msg_lookup.m: Likewise.
	* objc.dg/gnu-api-2-object.m: Likewise.
	* objc.dg/gnu-api-2-property.m: Likewise.
	* objc.dg/gnu-api-2-protocol.m: Likewise.
	* objc.dg/gnu-api-2-resolve-method.m: Likewise.
	* objc.dg/gnu-api-2-sel.m: Likewise.
	* objc.dg/incomplete-type-1.m: Likewise.
	* objc.dg/instancetype-0.m: Likewise.
	* objc.dg/invalid-method-2.m: Likewise.
	* objc.dg/ivar-invalid-type-1.m: Likewise.
	* objc.dg/ivar-problem-1.m: Likewise.
	* objc.dg/ivar-scope-1.m: Likewise.
	* objc.dg/ivar-scope-2.m: Likewise.
	* objc.dg/ivar-scope-4.m: Likewise.
	* objc.dg/ivar-visibility-1.m: Likewise.
	* objc.dg/ivar-visibility-2.m: Likewise.
	* objc.dg/ivar-visibility-3.m: Likewise.
	* objc.dg/ivar-visibility-4.m: Likewise.
	* objc.dg/local-decl-1.m: Likewise.
	* objc.dg/lto/lto.exp: Likewise.
	* objc.dg/lto/trivial-1_0.m: Likewise.
	* objc.dg/method-1.m: Likewise.
	* objc.dg/method-12.m: Likewise.
	* objc.dg/method-13.m: Likewise.
	* objc.dg/method-14.m: Likewise.
	* objc.dg/missing-proto-3.m: Likewise.
	* objc.dg/next-runtime-1.m: Likewise.
	* objc.dg/objc-foreach-1.m: Likewise.
	* objc.dg/objc-foreach-2.m: Likewise.
	* objc.dg/objc-foreach-3.m: Likewise.
	* objc.dg/objc-nofilename-1.m: Likewise.
	* objc.dg/param-1.m: Likewise.
	* objc.dg/pch/pch.exp: Likewise.
	* objc.dg/plugin/diagnostic-test-expressions-1.m: Likewise.
	* objc.dg/pr23709.m: Likewise.
	* objc.dg/private-1.m: Likewise.
	* objc.dg/private-2.m: Likewise.
	* objc.dg/property/property.exp: Likewise.
	* objc.dg/proto-hier-1.m: Likewise.
	* objc.dg/proto-hier-2.m: Likewise.
	* objc.dg/proto-lossage-1.m: Likewise.
	* objc.dg/proto-lossage-5.m: Likewise.
	* objc.dg/proto-qual-1.m: Likewise.
	* objc.dg/protocol-inheritance-1.m: Likewise.
	* objc.dg/protocol-inheritance-2.m: Likewise.
	* objc.dg/protocol-optional-1.m: Likewise.
	* objc.dg/selector-1.m: Likewise.
	* objc.dg/selector-2.m: Likewise.
	* objc.dg/selector-3.m: Likewise.
	* objc.dg/selector-4.m: Likewise.
	* objc.dg/shadow-1.m: Likewise.
	* objc.dg/shadow-2.m: Likewise.
	* objc.dg/special/load-category-1.m: Likewise.
	* objc.dg/special/load-category-2.m: Likewise.
	* objc.dg/special/load-category-3.m: Likewise.
	* objc.dg/special/special.exp: Likewise.
	* objc.dg/special/unclaimed-category-1.h: Likewise.
	* objc.dg/special/unclaimed-category-1.m: Likewise.
	* objc.dg/stabs-1.m: Likewise.
	* objc.dg/strings/strings.exp: Likewise.
	* objc.dg/stubify-1.m: Likewise.
	* objc.dg/stubify-2.m: Likewise.
	* objc.dg/super-class-2.m: Likewise.
	* objc.dg/super-dealloc-1.m: Likewise.
	* objc.dg/super-dealloc-2.m: Likewise.
	* objc.dg/sync-3.m: Likewise.
	* objc.dg/threedotthree-abi-1.m: Likewise.
	* objc.dg/torture/dg-torture.exp: Likewise.
	* objc.dg/torture/strings/strings.exp: Likewise.
	* objc.dg/try-catch-11.m: Likewise.
	* objc.dg/try-catch-12.m: Likewise.
	* objc.dg/type-size-2.m: Likewise.
	* objc.dg/type-size-3.m: Likewise.
	* objc.dg/type-size-4.m: Likewise.
	* objc.dg/type-size-5.m: Likewise.
	* objc.dg/undeclared-selector.m: Likewise.
	* objc.dg/volatile-1.m: Likewise.
---

diff --git a/gcc/testsuite/objc.dg/anon-1.m b/gcc/testsuite/objc.dg/anon-1.m
index 5f10f7d60261..5dab3fa142d6 100644
--- a/gcc/testsuite/objc.dg/anon-1.m
+++ b/gcc/testsuite/objc.dg/anon-1.m
@@ -1,5 +1,6 @@
 /* Test for graceful handling of anonymous ivars.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface Foo {
    unsigned char : 1;
diff --git a/gcc/testsuite/objc.dg/attributes/class-attribute-1.m b/gcc/testsuite/objc.dg/attributes/class-attribute-1.m
index 3444760bc3d3..93e5d7f40aeb 100644
--- a/gcc/testsuite/objc.dg/attributes/class-attribute-1.m
+++ b/gcc/testsuite/objc.dg/attributes/class-attribute-1.m
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test deprecate attribute with an @interface declaration.  */
 
diff --git a/gcc/testsuite/objc.dg/attributes/class-attribute-2.m b/gcc/testsuite/objc.dg/attributes/class-attribute-2.m
index 2e1bacb3fa01..f8137ffb4c4b 100644
--- a/gcc/testsuite/objc.dg/attributes/class-attribute-2.m
+++ b/gcc/testsuite/objc.dg/attributes/class-attribute-2.m
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/attributes/class-attribute-3.m b/gcc/testsuite/objc.dg/attributes/class-attribute-3.m
index 6cc5d4e26810..7c3b3b0e0062 100644
--- a/gcc/testsuite/objc.dg/attributes/class-attribute-3.m
+++ b/gcc/testsuite/objc.dg/attributes/class-attribute-3.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test that you get a warning when an unknown class attribute is ignored.  */
 
diff --git a/gcc/testsuite/objc.dg/attributes/method-deprecated-1.m b/gcc/testsuite/objc.dg/attributes/method-deprecated-1.m
index 8343856a5c6f..68e8373920da 100644
--- a/gcc/testsuite/objc.dg/attributes/method-deprecated-1.m
+++ b/gcc/testsuite/objc.dg/attributes/method-deprecated-1.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, October 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/attributes/method-deprecated-2.m b/gcc/testsuite/objc.dg/attributes/method-deprecated-2.m
index 1e5d87f3e632..8fb0e1510d00 100644
--- a/gcc/testsuite/objc.dg/attributes/method-deprecated-2.m
+++ b/gcc/testsuite/objc.dg/attributes/method-deprecated-2.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, October 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/attributes/method-deprecated-3.m b/gcc/testsuite/objc.dg/attributes/method-deprecated-3.m
index 5c715a20b683..efa2d349557b 100644
--- a/gcc/testsuite/objc.dg/attributes/method-deprecated-3.m
+++ b/gcc/testsuite/objc.dg/attributes/method-deprecated-3.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, October 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/attributes/method-format-1.m b/gcc/testsuite/objc.dg/attributes/method-format-1.m
index 9ff34f92fb17..d3bb997b2aaf 100644
--- a/gcc/testsuite/objc.dg/attributes/method-format-1.m
+++ b/gcc/testsuite/objc.dg/attributes/method-format-1.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, October 2010.  */
 /* { dg-do compile } */
 /* { dg-options "-Wall" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 #include <stdlib.h>
diff --git a/gcc/testsuite/objc.dg/attributes/method-nonnull-1.m b/gcc/testsuite/objc.dg/attributes/method-nonnull-1.m
index fe5f885b2d46..a3bfd9bc3c69 100644
--- a/gcc/testsuite/objc.dg/attributes/method-nonnull-1.m
+++ b/gcc/testsuite/objc.dg/attributes/method-nonnull-1.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, May 2011.  */
 /* { dg-do compile } */
 /* { dg-options "-Wall" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 #include <stdlib.h>
diff --git a/gcc/testsuite/objc.dg/attributes/method-noreturn-1.m b/gcc/testsuite/objc.dg/attributes/method-noreturn-1.m
index a83048bb7ed7..413a0be4b2bd 100644
--- a/gcc/testsuite/objc.dg/attributes/method-noreturn-1.m
+++ b/gcc/testsuite/objc.dg/attributes/method-noreturn-1.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, October 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 #include <stdlib.h>
diff --git a/gcc/testsuite/objc.dg/attributes/method-sentinel-1.m b/gcc/testsuite/objc.dg/attributes/method-sentinel-1.m
index e2abb1e8a1d5..f89c98121b9d 100644
--- a/gcc/testsuite/objc.dg/attributes/method-sentinel-1.m
+++ b/gcc/testsuite/objc.dg/attributes/method-sentinel-1.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, October 2010.  */
 /* { dg-do compile } */
 /* { dg-options "-Wall" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 #include <stdlib.h>
diff --git a/gcc/testsuite/objc.dg/attributes/nsobject-01.m b/gcc/testsuite/objc.dg/attributes/nsobject-01.m
index 5b5684903910..1f331508a89f 100644
--- a/gcc/testsuite/objc.dg/attributes/nsobject-01.m
+++ b/gcc/testsuite/objc.dg/attributes/nsobject-01.m
@@ -1,5 +1,6 @@
 /* Test handling of the NSObject attribute.  */
 /*  { dg-additional-options "-fsyntax-only " } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct AnObj * __attribute__ ((NSObject)) AnObjRef;
 typedef struct AnObj * __attribute__ ((__NSObject__)) AnotherObjRef;
diff --git a/gcc/testsuite/objc.dg/attributes/objc-exception-1.m b/gcc/testsuite/objc.dg/attributes/objc-exception-1.m
index e7f6f856f8fa..19e5ade8bcd1 100644
--- a/gcc/testsuite/objc.dg/attributes/objc-exception-1.m
+++ b/gcc/testsuite/objc.dg/attributes/objc-exception-1.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, February 2011.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test that the 'objc_exception' attribute is accepted for
    @interfaces, but not for anything else.  */
diff --git a/gcc/testsuite/objc.dg/attributes/parameter-attribute-1.m b/gcc/testsuite/objc.dg/attributes/parameter-attribute-1.m
index 8263df66db97..d6ebaf227f3b 100644
--- a/gcc/testsuite/objc.dg/attributes/parameter-attribute-1.m
+++ b/gcc/testsuite/objc.dg/attributes/parameter-attribute-1.m
@@ -1,6 +1,7 @@
 /* Test __attribute__((unused)) for an Objective-C method parameter.  */
 /* { dg-do compile } */
 /* { dg-options "-Wunused-parameter" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/attributes/parameter-attribute-2.m b/gcc/testsuite/objc.dg/attributes/parameter-attribute-2.m
index 99c5a308b8cb..637846d4a089 100644
--- a/gcc/testsuite/objc.dg/attributes/parameter-attribute-2.m
+++ b/gcc/testsuite/objc.dg/attributes/parameter-attribute-2.m
@@ -1,5 +1,6 @@
 /* Test that we get warnings for unrecognized attributes.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/attributes/proto-attribute-1.m b/gcc/testsuite/objc.dg/attributes/proto-attribute-1.m
index a852a7a6c2fd..03726dc7bed7 100644
--- a/gcc/testsuite/objc.dg/attributes/proto-attribute-1.m
+++ b/gcc/testsuite/objc.dg/attributes/proto-attribute-1.m
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/attributes/proto-attribute-2.m b/gcc/testsuite/objc.dg/attributes/proto-attribute-2.m
index b23b81de20c2..6a73d248ee8f 100644
--- a/gcc/testsuite/objc.dg/attributes/proto-attribute-2.m
+++ b/gcc/testsuite/objc.dg/attributes/proto-attribute-2.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test deprecate attribute with a forward declarations of
    @protocol.  */
diff --git a/gcc/testsuite/objc.dg/attributes/proto-attribute-3.m b/gcc/testsuite/objc.dg/attributes/proto-attribute-3.m
index 2be286ecfb70..ad6d0c804b1b 100644
--- a/gcc/testsuite/objc.dg/attributes/proto-attribute-3.m
+++ b/gcc/testsuite/objc.dg/attributes/proto-attribute-3.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test deprecate attribute with normal @protocol declarations.  */
 
diff --git a/gcc/testsuite/objc.dg/attributes/proto-attribute-4.m b/gcc/testsuite/objc.dg/attributes/proto-attribute-4.m
index 226fd68b3f2a..8d34ebdcc2fe 100644
--- a/gcc/testsuite/objc.dg/attributes/proto-attribute-4.m
+++ b/gcc/testsuite/objc.dg/attributes/proto-attribute-4.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test that you get a warning when an unknown protocol attribute is ignored.  */
 
diff --git a/gcc/testsuite/objc.dg/bitfield-2.m b/gcc/testsuite/objc.dg/bitfield-2.m
index 7e8147a7008d..b28c81e05695 100644
--- a/gcc/testsuite/objc.dg/bitfield-2.m
+++ b/gcc/testsuite/objc.dg/bitfield-2.m
@@ -4,6 +4,7 @@
 /* { dg-options "-fsigned-char" } */
 /* { dg-do run { target *-*-darwin* } } */
 /* { dg-skip-if "" { *-*-* } { "-fgnu-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_object { struct objc_class *class_pointer; } *id;
 
diff --git a/gcc/testsuite/objc.dg/break-in-ifstmt.m b/gcc/testsuite/objc.dg/break-in-ifstmt.m
index 896849472a71..6176832ed1c5 100644
--- a/gcc/testsuite/objc.dg/break-in-ifstmt.m
+++ b/gcc/testsuite/objc.dg/break-in-ifstmt.m
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface foo
 - (void) test;
diff --git a/gcc/testsuite/objc.dg/class-1.m b/gcc/testsuite/objc.dg/class-1.m
index 05049373fa4f..64383f22d99e 100644
--- a/gcc/testsuite/objc.dg/class-1.m
+++ b/gcc/testsuite/objc.dg/class-1.m
@@ -1,5 +1,6 @@
 /* Redeclarations of class names.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef int foo; /* { dg-line foo_def } */
 
@@ -8,6 +9,9 @@ typedef int foo; /* { dg-line foo_def } */
 
 typedef int bar; /* { dg-line bar_def } */
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface bar
 @end  /* { dg-error "redeclared as different kind of symbol" } */
 /* { dg-error "previous declaration of" "" { target *-*-* } bar_def } */
diff --git a/gcc/testsuite/objc.dg/class-extension-1.m b/gcc/testsuite/objc.dg/class-extension-1.m
index 5c89a9838cfb..9d6658a63993 100644
--- a/gcc/testsuite/objc.dg/class-extension-1.m
+++ b/gcc/testsuite/objc.dg/class-extension-1.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* This test tests the basic of class extensions.  */
 
diff --git a/gcc/testsuite/objc.dg/class-extension-2.m b/gcc/testsuite/objc.dg/class-extension-2.m
index 7f55b601fb3b..293facb189f8 100644
--- a/gcc/testsuite/objc.dg/class-extension-2.m
+++ b/gcc/testsuite/objc.dg/class-extension-2.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* This test tests class extensions and protocols.  */
 
diff --git a/gcc/testsuite/objc.dg/class-extension-3.m b/gcc/testsuite/objc.dg/class-extension-3.m
index 69e570539698..51fe5eef0836 100644
--- a/gcc/testsuite/objc.dg/class-extension-3.m
+++ b/gcc/testsuite/objc.dg/class-extension-3.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* This test tests warnings on class extensions.  */
 
diff --git a/gcc/testsuite/objc.dg/class-extension-4.m b/gcc/testsuite/objc.dg/class-extension-4.m
index 692a0fcbd0a8..5d367d40bd53 100644
--- a/gcc/testsuite/objc.dg/class-extension-4.m
+++ b/gcc/testsuite/objc.dg/class-extension-4.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* This test tests you can not declare a class extension after the class @implementation.  */
 
diff --git a/gcc/testsuite/objc.dg/class-protocol-1.m b/gcc/testsuite/objc.dg/class-protocol-1.m
index 59c8f8276159..34680c2ef3a8 100644
--- a/gcc/testsuite/objc.dg/class-protocol-1.m
+++ b/gcc/testsuite/objc.dg/class-protocol-1.m
@@ -1,6 +1,7 @@
 /* Check Class <protocol> types */
 /* Author: David Ayers <d.ayers@inode.at> */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 #include "../objc-obj-c++-shared/runtime.h"
diff --git a/gcc/testsuite/objc.dg/comp-types-7.m b/gcc/testsuite/objc.dg/comp-types-7.m
index 526934fbb821..6b796f09b296 100644
--- a/gcc/testsuite/objc.dg/comp-types-7.m
+++ b/gcc/testsuite/objc.dg/comp-types-7.m
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 /* We used to ICE because we removed the cast to List_linked*
    in -[ListIndex_linked next]. */
 
diff --git a/gcc/testsuite/objc.dg/demangle-1.m b/gcc/testsuite/objc.dg/demangle-1.m
index 42b79a9eb0a4..61e79a699766 100644
--- a/gcc/testsuite/objc.dg/demangle-1.m
+++ b/gcc/testsuite/objc.dg/demangle-1.m
@@ -1,6 +1,7 @@
 /* Test demangling an Objective-C method.  */
 /* { dg-do run } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <string.h>
 #include <stdlib.h>
diff --git a/gcc/testsuite/objc.dg/duplicate-class-1.m b/gcc/testsuite/objc.dg/duplicate-class-1.m
index 30a18ffa5a68..7992ebf978c5 100644
--- a/gcc/testsuite/objc.dg/duplicate-class-1.m
+++ b/gcc/testsuite/objc.dg/duplicate-class-1.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test that a duplicated @implementation for the same class does not
    crash the compiler.  */
diff --git a/gcc/testsuite/objc.dg/encode-6-next.m b/gcc/testsuite/objc.dg/encode-6-next.m
index c3d922659aa8..18ee15db446c 100644
--- a/gcc/testsuite/objc.dg/encode-6-next.m
+++ b/gcc/testsuite/objc.dg/encode-6-next.m
@@ -2,6 +2,7 @@
 /* Author: Ziemowit Laski  <zlaski@apple.com>  */
 /* { dg-do compile } */
 /* { dg-skip-if "" { *-*-* } { "-fgnu-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 struct Cxx {
   const struct Cxx *next;
diff --git a/gcc/testsuite/objc.dg/encode-6.m b/gcc/testsuite/objc.dg/encode-6.m
index 291a41e96a0a..9e9e4925c5ea 100644
--- a/gcc/testsuite/objc.dg/encode-6.m
+++ b/gcc/testsuite/objc.dg/encode-6.m
@@ -2,6 +2,7 @@
 /* Author: Ziemowit Laski  <zlaski@apple.com>  */
 /* { dg-do compile } */
 /* { dg-skip-if "" { *-*-* } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 struct Cxx {
   const struct Cxx *next;
diff --git a/gcc/testsuite/objc.dg/enhanced-proto-2.m b/gcc/testsuite/objc.dg/enhanced-proto-2.m
index c196b5151c9d..ca99445df409 100644
--- a/gcc/testsuite/objc.dg/enhanced-proto-2.m
+++ b/gcc/testsuite/objc.dg/enhanced-proto-2.m
@@ -1,5 +1,6 @@
 /* Test use of @optional/@required keywords in @protocol class. */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @protocol MyProto1 
 @optional
diff --git a/gcc/testsuite/objc.dg/exceptions-1.m b/gcc/testsuite/objc.dg/exceptions-1.m
index 0f3b7e8ae147..1e861773b966 100644
--- a/gcc/testsuite/objc.dg/exceptions-1.m
+++ b/gcc/testsuite/objc.dg/exceptions-1.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-options "-fobjc-exceptions" } */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* This test checks the syntax @catch (...) which catches any
    exceptions.  At the moment, @catch (...) is identical to @catch (id
diff --git a/gcc/testsuite/objc.dg/exceptions-3.m b/gcc/testsuite/objc.dg/exceptions-3.m
index 69a6494e0482..bedaf53ee839 100644
--- a/gcc/testsuite/objc.dg/exceptions-3.m
+++ b/gcc/testsuite/objc.dg/exceptions-3.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-options "-fobjc-exceptions" } */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test that the compiler is checking the argument of @catch(), and
    produce errors when invalid types are used.  */
diff --git a/gcc/testsuite/objc.dg/exceptions-4.m b/gcc/testsuite/objc.dg/exceptions-4.m
index bbdb741f40b5..5d77ffa61d25 100644
--- a/gcc/testsuite/objc.dg/exceptions-4.m
+++ b/gcc/testsuite/objc.dg/exceptions-4.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-options "-fobjc-exceptions" } */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test warnings when parsing syntax errors in @catch().  */
 
diff --git a/gcc/testsuite/objc.dg/exceptions-5.m b/gcc/testsuite/objc.dg/exceptions-5.m
index 55ef0f340e69..31796bc4c5cd 100644
--- a/gcc/testsuite/objc.dg/exceptions-5.m
+++ b/gcc/testsuite/objc.dg/exceptions-5.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-options "-fobjc-exceptions" } */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test that you can use an unnamed argument with @catch.  This test is the same
    as exceptions-3.m, but with no name for @catch arguments.  */
diff --git a/gcc/testsuite/objc.dg/fobjc-std-1.m b/gcc/testsuite/objc.dg/fobjc-std-1.m
index 9a15b8af5da9..729f65c5ea61 100644
--- a/gcc/testsuite/objc.dg/fobjc-std-1.m
+++ b/gcc/testsuite/objc.dg/fobjc-std-1.m
@@ -1,6 +1,7 @@
 /* Test warnings when using -fobjc-std=objc1.  */
 /* { dg-do compile } */
 /* { dg-options "-fobjc-std=objc1" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
@@ -29,8 +30,8 @@
 @end
 
 __attribute__ ((deprecated))
-@interface MyRootClass2
-{  /* { dg-error "class attributes are not available in Objective.C 1.0" } */
+@interface MyRootClass2 /* { dg-error "class attributes are not available in Objective.C 1.0" } */
+{  
   Class isa;
 }
 @end
diff --git a/gcc/testsuite/objc.dg/foreach-2.m b/gcc/testsuite/objc.dg/foreach-2.m
index 93bc9028463f..ccce557482fb 100644
--- a/gcc/testsuite/objc.dg/foreach-2.m
+++ b/gcc/testsuite/objc.dg/foreach-2.m
@@ -6,6 +6,7 @@
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
 /* { dg-options "-mno-constant-cfstrings" { target *-*-darwin* } } */
 /* { dg-additional-sources "../objc-obj-c++-shared/nsconstantstring-class-impl.m" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include "../objc-obj-c++-shared/TestsuiteObject.m"
 #ifndef __NEXT_RUNTIME__
diff --git a/gcc/testsuite/objc.dg/foreach-4.m b/gcc/testsuite/objc.dg/foreach-4.m
index faee73b82234..23656090c3cc 100644
--- a/gcc/testsuite/objc.dg/foreach-4.m
+++ b/gcc/testsuite/objc.dg/foreach-4.m
@@ -6,6 +6,7 @@
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
 /* { dg-options "-mno-constant-cfstrings" { target *-*-darwin* } } */
 /* { dg-additional-sources "../objc-obj-c++-shared/nsconstantstring-class-impl.m" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #import "../objc-obj-c++-shared/TestsuiteObject.m"
 #ifndef __NEXT_RUNTIME__
diff --git a/gcc/testsuite/objc.dg/foreach-5.m b/gcc/testsuite/objc.dg/foreach-5.m
index dce26fa3e939..1bcb10b6fafb 100644
--- a/gcc/testsuite/objc.dg/foreach-5.m
+++ b/gcc/testsuite/objc.dg/foreach-5.m
@@ -6,6 +6,7 @@
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
 /* { dg-options "-mno-constant-cfstrings" { target *-*-darwin* } } */
 /* { dg-additional-sources "../objc-obj-c++-shared/nsconstantstring-class-impl.m" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #import "../objc-obj-c++-shared/TestsuiteObject.m"
 #ifndef __NEXT_RUNTIME__
diff --git a/gcc/testsuite/objc.dg/fsyntax-only.m b/gcc/testsuite/objc.dg/fsyntax-only.m
index 54a879e22c5b..70ea8ace43de 100644
--- a/gcc/testsuite/objc.dg/fsyntax-only.m
+++ b/gcc/testsuite/objc.dg/fsyntax-only.m
@@ -2,6 +2,9 @@
 /* { dg-do compile } */
 /* { dg-options "-fsyntax-only" } */
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface foo
 -(void) my_method:(int) i with:(int) j;
 @end
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-class-meta.m b/gcc/testsuite/objc.dg/gnu-api-2-class-meta.m
index 3a85b163c913..6c1c76a87a31 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-class-meta.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-class-meta.m
@@ -20,6 +20,7 @@
 /* { dg-do run } */
 /* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 /* { dg-additional-options "-DOBJC_OLD_DISPATCH_PROTOTYPES" { target { *-*-darwin* } } } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
@@ -29,9 +30,6 @@
 #include <stdio.h>
 #include <string.h>
 
-#if __has_attribute(objc_root_class)
-__attribute__((objc_root_class))
-#endif
 @interface MyRootClass
 { Class isa; }
 + alloc;
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-class.m b/gcc/testsuite/objc.dg/gnu-api-2-class.m
index eade0dcbbfa1..d11dae0e6dc1 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-class.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-class.m
@@ -7,6 +7,7 @@
 /* { dg-do run } */
 /* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 /* { dg-additional-options "-DOBJC_OLD_DISPATCH_PROTOTYPES" { target { *-*-darwin* } } } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-ivar.m b/gcc/testsuite/objc.dg/gnu-api-2-ivar.m
index 19ac004e7b16..072d2655bb8b 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-ivar.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-ivar.m
@@ -5,6 +5,7 @@
 /* { dg-do run } */
 /* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
    objc/runtime.h.  */
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-method.m b/gcc/testsuite/objc.dg/gnu-api-2-method.m
index 0c4fe4f0c5e1..ea1da8d138f5 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-method.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-method.m
@@ -5,6 +5,7 @@
 /* { dg-do run } */
 /* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
    objc/runtime.h.  */
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-objc.m b/gcc/testsuite/objc.dg/gnu-api-2-objc.m
index 1b4ce8e47993..e9ec5d7ab940 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-objc.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-objc.m
@@ -9,6 +9,7 @@
    systems that don't have the V2 APis).  XFAILing the run is not useful
    since it will XPASS on the sub-set that works.  */
 /* { dg-skip-if "Incompatible" { *-*-darwin* } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
    objc/runtime.h.  */
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-objc_msg_lookup.m b/gcc/testsuite/objc.dg/gnu-api-2-objc_msg_lookup.m
index 5751f3fd298b..d417225cdfb0 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-objc_msg_lookup.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-objc_msg_lookup.m
@@ -5,6 +5,7 @@
 
 /* { dg-do run } */
 /* { dg-skip-if "" { *-*-* } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
    objc/runtime.h.  */
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-object.m b/gcc/testsuite/objc.dg/gnu-api-2-object.m
index 3d4d444fe27e..20c4342d2670 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-object.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-object.m
@@ -5,6 +5,7 @@
 /* { dg-do run } */
 /* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
    objc/runtime.h.  */
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-property.m b/gcc/testsuite/objc.dg/gnu-api-2-property.m
index 12c0d8b98e33..0ef4d79f9b35 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-property.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-property.m
@@ -4,6 +4,7 @@
 
 /* { dg-do run } */
 /* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
    objc/runtime.h.  */
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-protocol.m b/gcc/testsuite/objc.dg/gnu-api-2-protocol.m
index a34d74ce90dd..682adcd716e9 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-protocol.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-protocol.m
@@ -5,6 +5,7 @@
 /* { dg-do run } */
 /* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
    objc/runtime.h.  */
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-resolve-method.m b/gcc/testsuite/objc.dg/gnu-api-2-resolve-method.m
index a387709908cf..6eaa3dd72a31 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-resolve-method.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-resolve-method.m
@@ -5,6 +5,7 @@
 
 /* { dg-do run } */
 /* { dg-skip-if "" { *-*-* } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
    objc/runtime.h.  */
diff --git a/gcc/testsuite/objc.dg/gnu-api-2-sel.m b/gcc/testsuite/objc.dg/gnu-api-2-sel.m
index b71fdfab48cb..bc581bec2f74 100644
--- a/gcc/testsuite/objc.dg/gnu-api-2-sel.m
+++ b/gcc/testsuite/objc.dg/gnu-api-2-sel.m
@@ -4,6 +4,7 @@
 
 /* { dg-do run } */
 /* { dg-skip-if "No API#2 pre-Darwin9" { *-*-darwin[5-8]* } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* To get the modern GNU Objective-C Runtime API, you include
    objc/runtime.h.  */
diff --git a/gcc/testsuite/objc.dg/incomplete-type-1.m b/gcc/testsuite/objc.dg/incomplete-type-1.m
index f1e875f9aaea..60d0d8a11331 100644
--- a/gcc/testsuite/objc.dg/incomplete-type-1.m
+++ b/gcc/testsuite/objc.dg/incomplete-type-1.m
@@ -6,6 +6,9 @@
 enum type1;
 struct type2;
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface MyObject
 - (void) method1: (enum type1)argument;
 - (void) method2: (struct type2)argument;
diff --git a/gcc/testsuite/objc.dg/instancetype-0.m b/gcc/testsuite/objc.dg/instancetype-0.m
index 32cafdf314c3..dc279269d242 100644
--- a/gcc/testsuite/objc.dg/instancetype-0.m
+++ b/gcc/testsuite/objc.dg/instancetype-0.m
@@ -6,6 +6,9 @@
 extern id class_createInstance (id, int);
 extern id class_getSuperclass (id);
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface MyObject
 {
   Class isa;
diff --git a/gcc/testsuite/objc.dg/invalid-method-2.m b/gcc/testsuite/objc.dg/invalid-method-2.m
index cb18de957402..0a4bd6390fcd 100644
--- a/gcc/testsuite/objc.dg/invalid-method-2.m
+++ b/gcc/testsuite/objc.dg/invalid-method-2.m
@@ -3,6 +3,9 @@
 /* Test that using an invalid type in a method declaration produces a
    friendly error without a compiler crash.  */
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface MyClass
 @end
 
diff --git a/gcc/testsuite/objc.dg/ivar-invalid-type-1.m b/gcc/testsuite/objc.dg/ivar-invalid-type-1.m
index 3e7785db86f8..98bf36e17c9e 100644
--- a/gcc/testsuite/objc.dg/ivar-invalid-type-1.m
+++ b/gcc/testsuite/objc.dg/ivar-invalid-type-1.m
@@ -1,6 +1,9 @@
 /* { dg-do compile } */
 #include <objc/objc.h>
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface MyRootClass
 {
   Class isa;
diff --git a/gcc/testsuite/objc.dg/ivar-problem-1.m b/gcc/testsuite/objc.dg/ivar-problem-1.m
index 4a877680549a..0d5bb66ea324 100644
--- a/gcc/testsuite/objc.dg/ivar-problem-1.m
+++ b/gcc/testsuite/objc.dg/ivar-problem-1.m
@@ -10,6 +10,9 @@
 #include <stdlib.h>
 #include <objc/objc.h>
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface MyRootClass1
 {
   Class isa;
@@ -36,6 +39,9 @@
 @end
 
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface MyRootClass2
 {
   Class isa;
diff --git a/gcc/testsuite/objc.dg/ivar-scope-1.m b/gcc/testsuite/objc.dg/ivar-scope-1.m
index 34443a442fe0..64d275b44bd1 100644
--- a/gcc/testsuite/objc.dg/ivar-scope-1.m
+++ b/gcc/testsuite/objc.dg/ivar-scope-1.m
@@ -3,6 +3,9 @@
 /* { dg-do compile } */
 #include <objc/objc.h>
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface MyClass
 {
   int someivar;
diff --git a/gcc/testsuite/objc.dg/ivar-scope-2.m b/gcc/testsuite/objc.dg/ivar-scope-2.m
index ff795d08d6a3..1149d735d127 100644
--- a/gcc/testsuite/objc.dg/ivar-scope-2.m
+++ b/gcc/testsuite/objc.dg/ivar-scope-2.m
@@ -4,6 +4,9 @@
 /* { dg-additional-options "-fno-local-ivars" } */
 #include <objc/objc.h>
 
+#if defined(__has_attribute) && __has_attribute(objc_root_class)
+__attribute__((objc_root_class))
+#endif
 @interface MyClass
 {
   int someivar;
diff --git a/gcc/testsuite/objc.dg/ivar-scope-4.m b/gcc/testsuite/objc.dg/ivar-scope-4.m
index 5fc29f90bdcb..df1c8927586e 100644
--- a/gcc/testsuite/objc.dg/ivar-scope-4.m
+++ b/gcc/testsuite/objc.dg/ivar-scope-4.m
@@ -1,7 +1,8 @@
 /* Test instance variable scope.  */
 /* Author: Dimitris Papavasiliou <dpapavas@gmail.com>.  */
 /* { dg-do run } */
-/* { dg-additional-options "-Wno-shadow-ivar -fno-local-ivars" } */
+/* { dg-additional-options "-Wno-shadow-ivar -fno-local-ivars -Wno-objc-root-class" } */
+
 #include "../objc-obj-c++-shared/runtime.h"
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/ivar-visibility-1.m b/gcc/testsuite/objc.dg/ivar-visibility-1.m
index 5a222591d19a..79d791ec7aba 100644
--- a/gcc/testsuite/objc.dg/ivar-visibility-1.m
+++ b/gcc/testsuite/objc.dg/ivar-visibility-1.m
@@ -1,6 +1,7 @@
 /* Test instance variable visibility.  */
 /* Author: Dimitris Papavasiliou <dpapavas@gmail.com>.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 #include <objc/objc.h>
 
 @interface MySuperClass
diff --git a/gcc/testsuite/objc.dg/ivar-visibility-2.m b/gcc/testsuite/objc.dg/ivar-visibility-2.m
index eb41c8f4db02..6ddcb5b46652 100644
--- a/gcc/testsuite/objc.dg/ivar-visibility-2.m
+++ b/gcc/testsuite/objc.dg/ivar-visibility-2.m
@@ -1,7 +1,7 @@
 /* Test instance variable visibility.  */
 /* Author: Dimitris Papavasiliou <dpapavas@gmail.com>.  */
 /* { dg-do compile } */
-/* { dg-additional-options "-fivar-visibility=protected" } */
+/* { dg-additional-options "-fivar-visibility=protected -Wno-objc-root-class" } */
 #include <objc/objc.h>
 
 @interface MySuperClass
diff --git a/gcc/testsuite/objc.dg/ivar-visibility-3.m b/gcc/testsuite/objc.dg/ivar-visibility-3.m
index ecc6f99c7605..64035037a25d 100644
--- a/gcc/testsuite/objc.dg/ivar-visibility-3.m
+++ b/gcc/testsuite/objc.dg/ivar-visibility-3.m
@@ -1,7 +1,7 @@
 /* Test instance variable visibility.  */
 /* Author: Dimitris Papavasiliou <dpapavas@gmail.com>.  */
 /* { dg-do compile } */
-/* { dg-additional-options "-fivar-visibility=private" } */
+/* { dg-additional-options "-fivar-visibility=private -Wno-objc-root-class" } */
 #include <objc/objc.h>
 
 @interface MySuperClass
diff --git a/gcc/testsuite/objc.dg/ivar-visibility-4.m b/gcc/testsuite/objc.dg/ivar-visibility-4.m
index adfeb449e55b..abd802b5423d 100644
--- a/gcc/testsuite/objc.dg/ivar-visibility-4.m
+++ b/gcc/testsuite/objc.dg/ivar-visibility-4.m
@@ -1,7 +1,7 @@
 /* Test instance variable visibility.  */
 /* Author: Dimitris Papavasiliou <dpapavas@gmail.com>.  */
 /* { dg-do compile } */
-/* { dg-additional-options "-fivar-visibility=public" } */
+/* { dg-additional-options "-fivar-visibility=public -Wno-objc-root-class" } */
 #include <objc/objc.h>
 
 @interface MySuperClass
diff --git a/gcc/testsuite/objc.dg/local-decl-1.m b/gcc/testsuite/objc.dg/local-decl-1.m
index 4a4bfdffe7e5..8356a8ca2489 100644
--- a/gcc/testsuite/objc.dg/local-decl-1.m
+++ b/gcc/testsuite/objc.dg/local-decl-1.m
@@ -1,6 +1,7 @@
 /* Test for hiding of ivars by local variables.  */
 /* Author: Ziemowit Laski <zlaski@apple.com>.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface Sprite {
   int a;
diff --git a/gcc/testsuite/objc.dg/lto/lto.exp b/gcc/testsuite/objc.dg/lto/lto.exp
index e563ecbc3c24..8a362d672887 100644
--- a/gcc/testsuite/objc.dg/lto/lto.exp
+++ b/gcc/testsuite/objc.dg/lto/lto.exp
@@ -41,10 +41,10 @@ if { ![check_effective_target_lto] } {
 global LTO_OPTIONS
 
 set LTO_OPTIONS [list	\
-  {-O0 -flto -fgnu-runtime}	\
-  {-O2 -flto -fgnu-runtime}	\
-  {-O0 -flto -flto-partition=none -fgnu-runtime} 	\
-  {-O2 -flto -flto-partition=none -fgnu-runtime}	\
+  {-O0 -flto -fgnu-runtime -Wno-objc-root-class}	\
+  {-O2 -flto -fgnu-runtime -Wno-objc-root-class }	\
+  {-O0 -flto -flto-partition=none -fgnu-runtime -Wno-objc-root-class} 	\
+  {-O2 -flto -flto-partition=none -fgnu-runtime -Wno-objc-root-class}	\
 ]
 
 objc_init
@@ -67,10 +67,10 @@ foreach src $tests {
 # darwin targets can also run code with the NeXT runtime.
 if [istarget "*-*-darwin*" ] {
 set LTO_OPTIONS [list	\
-  {-O0 -flto -fnext-runtime}	\
-  {-O2 -flto -fnext-runtime}	\
-  {-O0 -flto -flto-partition=none -fnext-runtime} 	\
-  {-O2 -flto -flto-partition=none -fnext-runtime}	\
+  {-O0 -flto -fnext-runtime -Wno-objc-root-class}	\
+  {-O2 -flto -fnext-runtime -Wno-objc-root-class}	\
+  {-O0 -flto -flto-partition=none -fnext-runtime -Wno-objc-root-class} 	\
+  {-O2 -flto -flto-partition=none -fnext-runtime -Wno-objc-root-class}	\
 ]
   foreach src $tests {
     # If we're only testing specific files and this isn't one of them, skip it.
diff --git a/gcc/testsuite/objc.dg/lto/trivial-1_0.m b/gcc/testsuite/objc.dg/lto/trivial-1_0.m
index ba1b1aa8b359..ca07fa4bdb2a 100644
--- a/gcc/testsuite/objc.dg/lto/trivial-1_0.m
+++ b/gcc/testsuite/objc.dg/lto/trivial-1_0.m
@@ -1,5 +1,5 @@
 /* { dg-lto-do run } */
-/* { dg-skip-if "" { "*-*-darwin*" && lp64 } } */
+
 extern int printf (char *,...) ;
 
 typedef struct objc_class *Class;
@@ -7,7 +7,7 @@ typedef struct objc_class *Class;
 struct objc_class {
     Class isa;
     /* other stuff... */
-}  ;
+};
 
 @interface myRootObject {
 @public
diff --git a/gcc/testsuite/objc.dg/method-1.m b/gcc/testsuite/objc.dg/method-1.m
index 194c64fac4e0..bd23493988ce 100644
--- a/gcc/testsuite/objc.dg/method-1.m
+++ b/gcc/testsuite/objc.dg/method-1.m
@@ -1,5 +1,6 @@
 /* Tests of duplication.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface class1
 - (int) meth1;   /* { dg-message "previous declaration" } */
diff --git a/gcc/testsuite/objc.dg/method-12.m b/gcc/testsuite/objc.dg/method-12.m
index 411caac111ad..b69a84f300be 100644
--- a/gcc/testsuite/objc.dg/method-12.m
+++ b/gcc/testsuite/objc.dg/method-12.m
@@ -1,5 +1,6 @@
 /* Contributed by Igor Seleznev <selez@mail.ru>.  */
 /* This used to be broken.  */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/method-13.m b/gcc/testsuite/objc.dg/method-13.m
index 592038b9d936..3e0fde5f5bab 100644
--- a/gcc/testsuite/objc.dg/method-13.m
+++ b/gcc/testsuite/objc.dg/method-13.m
@@ -4,6 +4,7 @@
 /* Author: Ziemowit Laski <zlaski@apple.com>.  */
 /* { dg-do run } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 #include "../objc-obj-c++-shared/runtime.h"
diff --git a/gcc/testsuite/objc.dg/method-14.m b/gcc/testsuite/objc.dg/method-14.m
index 96982254aa9f..bc3ee12f20b2 100644
--- a/gcc/testsuite/objc.dg/method-14.m
+++ b/gcc/testsuite/objc.dg/method-14.m
@@ -2,6 +2,7 @@
    used as method selectors.  */
 /* Author: Ziemowit Laski <zlaski@apple.com>.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface Foo
 - (void)insertNewButtonImage:(Foo *)newButtonImage in:(Foo *)buttonCell;
diff --git a/gcc/testsuite/objc.dg/missing-proto-3.m b/gcc/testsuite/objc.dg/missing-proto-3.m
index 05e1a258183c..77aa3a39446b 100644
--- a/gcc/testsuite/objc.dg/missing-proto-3.m
+++ b/gcc/testsuite/objc.dg/missing-proto-3.m
@@ -2,7 +2,8 @@
    In addition to not crashing :-), the compiler should properly handle
    valid protocol references, even when they're mixed with invalid ones.  */
 /* { dg-do compile } */
- 
+/* { dg-additional-options "-Wno-objc-root-class" } */
+
 #include <objc/objc.h>
 
 @protocol DefinedProtocol
diff --git a/gcc/testsuite/objc.dg/next-runtime-1.m b/gcc/testsuite/objc.dg/next-runtime-1.m
index c76b6166d2ef..2ce798bc94f2 100644
--- a/gcc/testsuite/objc.dg/next-runtime-1.m
+++ b/gcc/testsuite/objc.dg/next-runtime-1.m
@@ -7,6 +7,7 @@
 /* { dg-skip-if "" { *-*-* } { "-fgnu-runtime" } { "" } } */
 /* { dg-skip-if "" { *-*-* } { "-fobjc-abi-version=1" } { "" } } */
 /* { dg-options "-fobjc-abi-version=0" { target { *-*-darwin* && { ! lp64 } } } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface FooBar
 - (void)boo;
diff --git a/gcc/testsuite/objc.dg/objc-foreach-1.m b/gcc/testsuite/objc.dg/objc-foreach-1.m
index 81f5dae0c2f2..e4c958ced72b 100644
--- a/gcc/testsuite/objc.dg/objc-foreach-1.m
+++ b/gcc/testsuite/objc.dg/objc-foreach-1.m
@@ -1,5 +1,6 @@
 /* Syntax check for the new foreach statement. */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_class *Class;
 
diff --git a/gcc/testsuite/objc.dg/objc-foreach-2.m b/gcc/testsuite/objc.dg/objc-foreach-2.m
index a01f004fec6c..0f79089f2784 100644
--- a/gcc/testsuite/objc.dg/objc-foreach-2.m
+++ b/gcc/testsuite/objc.dg/objc-foreach-2.m
@@ -1,5 +1,6 @@
 /* Syntax check for the new foreach statement. */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_class *Class;
 
diff --git a/gcc/testsuite/objc.dg/objc-foreach-3.m b/gcc/testsuite/objc.dg/objc-foreach-3.m
index 922db39e7481..b551ae394361 100644
--- a/gcc/testsuite/objc.dg/objc-foreach-3.m
+++ b/gcc/testsuite/objc.dg/objc-foreach-3.m
@@ -1,6 +1,7 @@
 /* Syntax check for the new foreach statement. 
    Use of declaration in loop-header without requiring c99 mode. */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_class *Class;
 
diff --git a/gcc/testsuite/objc.dg/objc-nofilename-1.m b/gcc/testsuite/objc.dg/objc-nofilename-1.m
index 21e0c53b70e9..3ddaa6431ec0 100644
--- a/gcc/testsuite/objc.dg/objc-nofilename-1.m
+++ b/gcc/testsuite/objc.dg/objc-nofilename-1.m
@@ -1,5 +1,6 @@
 /* Test to make sure that file name does not appear in the binary. */
 /* { dg-do compile { target *-*-darwin* } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/param-1.m b/gcc/testsuite/objc.dg/param-1.m
index 9dbf6e3fcd94..8e7781169acb 100644
--- a/gcc/testsuite/objc.dg/param-1.m
+++ b/gcc/testsuite/objc.dg/param-1.m
@@ -1,6 +1,7 @@
 /* Test if compiler detects object as an parameter to a method
    or not. It is not valid.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface foo
 @end
diff --git a/gcc/testsuite/objc.dg/pch/pch.exp b/gcc/testsuite/objc.dg/pch/pch.exp
index 2da3d96d4fe3..54c3e429efed 100644
--- a/gcc/testsuite/objc.dg/pch/pch.exp
+++ b/gcc/testsuite/objc.dg/pch/pch.exp
@@ -41,7 +41,7 @@ foreach test [lsort [glob -nocomplain $srcdir/$subdir/*.m]] {
     # unlikely to make any difference to PCH.  However, we do want to
     # add -O0 -g, since users who want PCH usually want debugging and quick
     # compiles.
-    dg-flags-pch $subdir $test "-fgnu-runtime" $mytorture ".h"
+    dg-flags-pch $subdir $test "-fgnu-runtime -Wno-objc-root-class" $mytorture ".h"
 }
 
 if [istarget "*-*-darwin*" ] {
@@ -52,7 +52,7 @@ if [istarget "*-*-darwin*" ] {
     # unlikely to make any difference to PCH.  However, we do want to
     # add -O0 -g, since users who want PCH usually want debugging and quick
     # compiles.
-    dg-flags-pch $subdir $test "-fnext-runtime" $mytorture ".h"
+    dg-flags-pch $subdir $test "-fnext-runtime -Wno-objc-root-class" $mytorture ".h"
   }
 }
 
diff --git a/gcc/testsuite/objc.dg/plugin/diagnostic-test-expressions-1.m b/gcc/testsuite/objc.dg/plugin/diagnostic-test-expressions-1.m
index 23a93021e839..7070b37b38c7 100644
--- a/gcc/testsuite/objc.dg/plugin/diagnostic-test-expressions-1.m
+++ b/gcc/testsuite/objc.dg/plugin/diagnostic-test-expressions-1.m
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O -fdiagnostics-show-caret" } */
+/* { dg-options "-O -fdiagnostics-show-caret -Wno-objc-root-class" } */
 
 /* This file is similar to diagnostic-test-expressions-1.c
    (see the notes in that file); this file adds test
diff --git a/gcc/testsuite/objc.dg/pr23709.m b/gcc/testsuite/objc.dg/pr23709.m
index 7ff9b6052398..2bdcca56d364 100644
--- a/gcc/testsuite/objc.dg/pr23709.m
+++ b/gcc/testsuite/objc.dg/pr23709.m
@@ -1,4 +1,5 @@
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface A
 +(void)method: (int)parameter {} /* { dg-error "expected" } */
diff --git a/gcc/testsuite/objc.dg/private-1.m b/gcc/testsuite/objc.dg/private-1.m
index 7540fc5800c5..5bd29e5939b1 100644
--- a/gcc/testsuite/objc.dg/private-1.m
+++ b/gcc/testsuite/objc.dg/private-1.m
@@ -1,6 +1,7 @@
 /* Test errors for accessing @private and @protected variables.  */
 /* Author: Nicola Pero <nicola@brainstorm.co.uk>.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 #include <objc/objc.h>
 
 @interface MySuperClass
diff --git a/gcc/testsuite/objc.dg/private-2.m b/gcc/testsuite/objc.dg/private-2.m
index eff376a0c84b..d0646f5ca68f 100644
--- a/gcc/testsuite/objc.dg/private-2.m
+++ b/gcc/testsuite/objc.dg/private-2.m
@@ -1,6 +1,7 @@
 /* Test warnings for shadowing instance variables.  */
 /* Author: Nicola Pero <nicola@brainstorm.co.uk>.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 #include <objc/objc.h>
 
 @interface MySuperClass
diff --git a/gcc/testsuite/objc.dg/property/property.exp b/gcc/testsuite/objc.dg/property/property.exp
index 47ffcdf27db8..1c203dbcbf0a 100644
--- a/gcc/testsuite/objc.dg/property/property.exp
+++ b/gcc/testsuite/objc.dg/property/property.exp
@@ -31,12 +31,12 @@ dg-init
 set tests [lsort [glob -nocomplain $srcdir/$subdir/*.m]]
 
 # Main loop.
-dg-runtest $tests "-fgnu-runtime" $DEFAULT_CFLAGS
+dg-runtest $tests "-fgnu-runtime -Wno-objc-root-class" $DEFAULT_CFLAGS
 
 # Darwin targets can also run code with the NeXT runtime.
 # but Properties are not supported by the runtime lib before Darwin 9.
 if [istarget "*-*-darwin\[9123\]*" ] {
-  dg-runtest $tests "-fnext-runtime" $DEFAULT_CFLAGS
+  dg-runtest $tests "-fnext-runtime -Wno-objc-root-class" $DEFAULT_CFLAGS
 }
 
 # All done.
diff --git a/gcc/testsuite/objc.dg/proto-hier-1.m b/gcc/testsuite/objc.dg/proto-hier-1.m
index 0f409fc69ed4..648a4d45cc39 100644
--- a/gcc/testsuite/objc.dg/proto-hier-1.m
+++ b/gcc/testsuite/objc.dg/proto-hier-1.m
@@ -1,6 +1,7 @@
 /* Test for handling of protocol hierarchies.  */
 /* Author: Ziemowit Laski <zlaski@apple.com>.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* One-line substitute for objc/objc.h */
 typedef struct objc_object { struct objc_class *class_pointer; } *id;
diff --git a/gcc/testsuite/objc.dg/proto-hier-2.m b/gcc/testsuite/objc.dg/proto-hier-2.m
index 819cf4a5089b..6b3f803d5cba 100644
--- a/gcc/testsuite/objc.dg/proto-hier-2.m
+++ b/gcc/testsuite/objc.dg/proto-hier-2.m
@@ -1,6 +1,7 @@
 /* Test protocol warning.  */
 /* Contributed by Devang Patel <dpatel@apple.com>.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_object { struct objc_class *class_pointer; } *id;
 
diff --git a/gcc/testsuite/objc.dg/proto-lossage-1.m b/gcc/testsuite/objc.dg/proto-lossage-1.m
index 2f7eb9861400..4564a9432f12 100644
--- a/gcc/testsuite/objc.dg/proto-lossage-1.m
+++ b/gcc/testsuite/objc.dg/proto-lossage-1.m
@@ -2,6 +2,7 @@
    may be lost, leading to superfluous warnings.  */
 /* Author: Ziemowit Laski <zlaski@apple.com>.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* One-line substitute for objc/objc.h */
 typedef struct objc_object { struct objc_class *class_pointer; } *id;
diff --git a/gcc/testsuite/objc.dg/proto-lossage-5.m b/gcc/testsuite/objc.dg/proto-lossage-5.m
index 35c0956ed8ec..a18b3578cbce 100644
--- a/gcc/testsuite/objc.dg/proto-lossage-5.m
+++ b/gcc/testsuite/objc.dg/proto-lossage-5.m
@@ -1,5 +1,6 @@
 /* Do not lose references to forward-declared protocols.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 @class MyBaseClass;
 @class MyClassThatFails;
 @protocol _MyProtocol;
diff --git a/gcc/testsuite/objc.dg/proto-qual-1.m b/gcc/testsuite/objc.dg/proto-qual-1.m
index 40eb0f9f5c5a..6e908727678a 100644
--- a/gcc/testsuite/objc.dg/proto-qual-1.m
+++ b/gcc/testsuite/objc.dg/proto-qual-1.m
@@ -3,6 +3,7 @@
 
 /* { dg-do run } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include "../objc-obj-c++-shared/runtime.h"
 #include <objc/Protocol.h>
diff --git a/gcc/testsuite/objc.dg/protocol-inheritance-1.m b/gcc/testsuite/objc.dg/protocol-inheritance-1.m
index 5241b29abbd4..5367a9870be6 100644
--- a/gcc/testsuite/objc.dg/protocol-inheritance-1.m
+++ b/gcc/testsuite/objc.dg/protocol-inheritance-1.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-do compile } */
 /* { dg-options "-Wno-protocol" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/protocol-inheritance-2.m b/gcc/testsuite/objc.dg/protocol-inheritance-2.m
index 74c9174b5de7..9776a40f1da6 100644
--- a/gcc/testsuite/objc.dg/protocol-inheritance-2.m
+++ b/gcc/testsuite/objc.dg/protocol-inheritance-2.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/protocol-optional-1.m b/gcc/testsuite/objc.dg/protocol-optional-1.m
index bc4a3d07e978..29fe72ea00ff 100644
--- a/gcc/testsuite/objc.dg/protocol-optional-1.m
+++ b/gcc/testsuite/objc.dg/protocol-optional-1.m
@@ -1,5 +1,6 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010.  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/selector-1.m b/gcc/testsuite/objc.dg/selector-1.m
index f0781b68c63f..5ff15a2e0a72 100644
--- a/gcc/testsuite/objc.dg/selector-1.m
+++ b/gcc/testsuite/objc.dg/selector-1.m
@@ -3,6 +3,7 @@
 /* { dg-options "-Wselector" } */
 /* { dg-do compile } */
 /* { dg-skip-if "" { *-*-* } { "-fgnu-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_object { struct objc_class *class_pointer; } *id;
 typedef struct objc_selector    *SEL;
diff --git a/gcc/testsuite/objc.dg/selector-2.m b/gcc/testsuite/objc.dg/selector-2.m
index 6cad2ffb092e..5042104ed3ed 100644
--- a/gcc/testsuite/objc.dg/selector-2.m
+++ b/gcc/testsuite/objc.dg/selector-2.m
@@ -1,6 +1,7 @@
 /* Test that we don't ICE when issuing a -Wselector warning.  */
 /* { dg-options "-Wselector" } */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/selector-3.m b/gcc/testsuite/objc.dg/selector-3.m
index c0c5f3d8fba7..94838cd3803b 100644
--- a/gcc/testsuite/objc.dg/selector-3.m
+++ b/gcc/testsuite/objc.dg/selector-3.m
@@ -3,6 +3,7 @@
 /* { dg-options "-Wselector" } */
 /* { dg-do compile } */
 /* { dg-skip-if "" { *-*-* } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_object { struct objc_class *class_pointer; } *id;
 typedef const struct objc_selector    *SEL;
diff --git a/gcc/testsuite/objc.dg/selector-4.m b/gcc/testsuite/objc.dg/selector-4.m
index d34f8c89cd6f..2a4947e322a1 100644
--- a/gcc/testsuite/objc.dg/selector-4.m
+++ b/gcc/testsuite/objc.dg/selector-4.m
@@ -3,6 +3,7 @@
 /* Author: Ziemowit Laski <zlaski@apple.com>.  */
 
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface Int1 
 + (int)and_eq:(int)arg1 and:(int)arg2;
diff --git a/gcc/testsuite/objc.dg/shadow-1.m b/gcc/testsuite/objc.dg/shadow-1.m
index 739a0d0312e7..d18fd6e5f93c 100644
--- a/gcc/testsuite/objc.dg/shadow-1.m
+++ b/gcc/testsuite/objc.dg/shadow-1.m
@@ -2,6 +2,7 @@
 /* Author: Dimitris Papavasiliou <dpapavas@gmail.com>.  */
 /* { dg-do compile } */
 /* { dg-additional-options "-Wno-shadow-ivar" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 #include <objc/objc.h>
 
 @interface MyClass
diff --git a/gcc/testsuite/objc.dg/shadow-2.m b/gcc/testsuite/objc.dg/shadow-2.m
index 16261b94a217..26447fe10818 100644
--- a/gcc/testsuite/objc.dg/shadow-2.m
+++ b/gcc/testsuite/objc.dg/shadow-2.m
@@ -2,6 +2,7 @@
 /* Author: Dimitris Papavasiliou <dpapavas@gmail.com>.  */
 /* { dg-do compile } */
 /* { dg-additional-options "-Wno-shadow" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 #include <objc/objc.h>
 
 @interface MyClass
diff --git a/gcc/testsuite/objc.dg/special/load-category-1.m b/gcc/testsuite/objc.dg/special/load-category-1.m
index cb221436f02e..b72d0709044e 100644
--- a/gcc/testsuite/objc.dg/special/load-category-1.m
+++ b/gcc/testsuite/objc.dg/special/load-category-1.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-do run } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <stdlib.h>
 #include <objc/objc.h>
diff --git a/gcc/testsuite/objc.dg/special/load-category-2.m b/gcc/testsuite/objc.dg/special/load-category-2.m
index 7dc74595206e..2706351da223 100644
--- a/gcc/testsuite/objc.dg/special/load-category-2.m
+++ b/gcc/testsuite/objc.dg/special/load-category-2.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-do run } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/gcc/testsuite/objc.dg/special/load-category-3.m b/gcc/testsuite/objc.dg/special/load-category-3.m
index b89d8f152860..215e463fcbe1 100644
--- a/gcc/testsuite/objc.dg/special/load-category-3.m
+++ b/gcc/testsuite/objc.dg/special/load-category-3.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-do run } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* This test is identical to load-category-2, but the classes and
    categories are created in inverted order in the modules, to test
diff --git a/gcc/testsuite/objc.dg/special/special.exp b/gcc/testsuite/objc.dg/special/special.exp
index d770e2accb36..f561d3895d49 100644
--- a/gcc/testsuite/objc.dg/special/special.exp
+++ b/gcc/testsuite/objc.dg/special/special.exp
@@ -39,6 +39,7 @@ dg-init
 # for all systems we point to the libobjc includes and use the -fgnu-runtime
 set add_flags "additional_flags=-I${srcdir}/../../libobjc"
 lappend add_flags "additional_flags=-fgnu-runtime"
+lappend add_flags "additional_flags=-Wno-objc-root-class"
 set lines [objc_target_compile "$srcdir/$subdir/unclaimed-category-1a.m" "unclaimed-category-1a.o" object $add_flags ]
 if ![string match "" $lines] then {
     fail "unclaimed-category-1a.o"
@@ -50,6 +51,7 @@ if ![string match "" $lines] then {
 if [istarget "*-*-darwin*" ] {
 set add_flags ""
 lappend add_flags "additional_flags=-fnext-runtime"
+lappend add_flags "additional_flags=-Wno-objc-root-class"
 set lines [objc_target_compile "$srcdir/$subdir/unclaimed-category-1a.m" "unclaimed-category-1a.o" object $add_flags ]
 if ![string match "" $lines] then {
     fail "unclaimed-category-1a.o"
@@ -66,6 +68,7 @@ if ![string match "" $lines] then {
 # and load-category-1a.m, link them together, and execute the result.
 set add_flags "additional_flags=-I${srcdir}/../../libobjc"
 lappend add_flags "additional_flags=-fgnu-runtime"
+lappend add_flags "additional_flags=-Wno-objc-root-class"
 set lines [objc_target_compile "$srcdir/$subdir/load-category-1a.m" "load-category-1a.o" object $add_flags ]
 if ![string match "" $lines] then {
     fail "load-category-1a.o"
@@ -77,6 +80,7 @@ if ![string match "" $lines] then {
 if [istarget "*-*-darwin*" ] {
 set add_flags ""
 lappend add_flags "additional_flags=-fnext-runtime"
+lappend add_flags "additional_flags=-Wno-objc-root-class"
 set lines [objc_target_compile "$srcdir/$subdir/load-category-1a.m" "load-category-1a.o" object $add_flags ]
 if ![string match "" $lines] then {
     fail "load-category-1a.o"
@@ -93,6 +97,7 @@ if ![string match "" $lines] then {
 # and load-category-2a.m, link them together, and execute the result.
 set add_flags "additional_flags=-I${srcdir}/../../libobjc"
 lappend add_flags "additional_flags=-fgnu-runtime"
+lappend add_flags "additional_flags=-Wno-objc-root-class"
 set lines [objc_target_compile "$srcdir/$subdir/load-category-2a.m" "load-category-2a.o" object $add_flags ]
 if ![string match "" $lines] then {
     fail "load-category-2a.o"
@@ -104,6 +109,7 @@ if ![string match "" $lines] then {
 if [istarget "*-*-darwin*" ] {
 set add_flags ""
 lappend add_flags "additional_flags=-fnext-runtime"
+lappend add_flags "additional_flags=-Wno-objc-root-class"
 set lines [objc_target_compile "$srcdir/$subdir/load-category-2a.m" "load-category-2a.o" object $add_flags ]
 if ![string match "" $lines] then {
     fail "load-category-2a.o"
@@ -120,6 +126,7 @@ if ![string match "" $lines] then {
 # and load-category-3a.m, link them together, and execute the result.
 set add_flags "additional_flags=-I${srcdir}/../../libobjc"
 lappend add_flags "additional_flags=-fgnu-runtime"
+lappend add_flags "additional_flags=-Wno-objc-root-class"
 set lines [objc_target_compile "$srcdir/$subdir/load-category-3a.m" "load-category-3a.o" object $add_flags ]
 if ![string match "" $lines] then {
     fail "load-category-3a.o"
@@ -131,6 +138,7 @@ if ![string match "" $lines] then {
 if [istarget "*-*-darwin*" ] {
 set add_flags ""
 lappend add_flags "additional_flags=-fnext-runtime"
+lappend add_flags "additional_flags=-Wno-objc-root-class"
 set lines [objc_target_compile "$srcdir/$subdir/load-category-3a.m" "load-category-3a.o" object $add_flags ]
 if ![string match "" $lines] then {
     fail "load-category-3a.o"
diff --git a/gcc/testsuite/objc.dg/special/unclaimed-category-1.h b/gcc/testsuite/objc.dg/special/unclaimed-category-1.h
index a32024df59f3..cb5812ea3273 100644
--- a/gcc/testsuite/objc.dg/special/unclaimed-category-1.h
+++ b/gcc/testsuite/objc.dg/special/unclaimed-category-1.h
@@ -1,4 +1,5 @@
 /* Contributed by Nicola Pero - Fri Dec 14 08:36:00 GMT 2001 */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test loading unclaimed categories - categories of a class defined
    separately from the class itself.  */
diff --git a/gcc/testsuite/objc.dg/special/unclaimed-category-1.m b/gcc/testsuite/objc.dg/special/unclaimed-category-1.m
index 7b434b4db54b..a8e422d34e98 100644
--- a/gcc/testsuite/objc.dg/special/unclaimed-category-1.m
+++ b/gcc/testsuite/objc.dg/special/unclaimed-category-1.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero - Fri Dec 14 08:36:00 GMT 2001 */
 /* { dg-do run } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 #include "../../objc-obj-c++-shared/runtime.h"
diff --git a/gcc/testsuite/objc.dg/stabs-1.m b/gcc/testsuite/objc.dg/stabs-1.m
index 452993ed9165..b97e4d6a762b 100644
--- a/gcc/testsuite/objc.dg/stabs-1.m
+++ b/gcc/testsuite/objc.dg/stabs-1.m
@@ -3,6 +3,7 @@
 
 /* { dg-do compile { target stabs } } */
 /* { dg-options "-gstabs" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface MyClass
 + newWithArg: arg;
diff --git a/gcc/testsuite/objc.dg/strings/strings.exp b/gcc/testsuite/objc.dg/strings/strings.exp
index 41da5cb5fc29..6042d3c14dea 100644
--- a/gcc/testsuite/objc.dg/strings/strings.exp
+++ b/gcc/testsuite/objc.dg/strings/strings.exp
@@ -35,11 +35,11 @@ dg-init
 set tests [lsort [glob -nocomplain $srcdir/$subdir/*.m]]
 
 # Main loop.
-dg-runtest $tests "-fgnu-runtime" $DEFAULT_CFLAGS
+dg-runtest $tests "-fgnu-runtime -Wno-objc-root-class" $DEFAULT_CFLAGS
 
 # darwin targets can also run code with the NeXT runtime.
 if [istarget "*-*-darwin*" ] {
-  dg-runtest $tests "-fnext-runtime" $DEFAULT_CFLAGS
+  dg-runtest $tests "-fnext-runtime -Wno-objc-root-class" $DEFAULT_CFLAGS
 }
 
 # All done.
diff --git a/gcc/testsuite/objc.dg/stubify-1.m b/gcc/testsuite/objc.dg/stubify-1.m
index 641595ccfe4c..4043492e6b8a 100644
--- a/gcc/testsuite/objc.dg/stubify-1.m
+++ b/gcc/testsuite/objc.dg/stubify-1.m
@@ -5,6 +5,7 @@
 /* { dg-skip-if "" { *-*-* } { "-fgnu-runtime" } { "" } } */
 /* { dg-require-effective-target ilp32 } */
 /* { dg-options "-Os -mdynamic-no-pic -mmacosx-version-min=10.4 -msymbol-stubs" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_object { } *id ;
 int x = 41 ;
diff --git a/gcc/testsuite/objc.dg/stubify-2.m b/gcc/testsuite/objc.dg/stubify-2.m
index 904ac44b2526..3e9097e11aca 100644
--- a/gcc/testsuite/objc.dg/stubify-2.m
+++ b/gcc/testsuite/objc.dg/stubify-2.m
@@ -5,6 +5,7 @@
 /* { dg-skip-if "" { *-*-* } { "-fgnu-runtime" } { "" } } */
 /* { dg-require-effective-target ilp32 } */
 /* { dg-options "-mdynamic-no-pic -fdump-rtl-jump -mmacosx-version-min=10.4 -msymbol-stubs" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_object { } *id ;
 int x = 41 ;
diff --git a/gcc/testsuite/objc.dg/super-class-2.m b/gcc/testsuite/objc.dg/super-class-2.m
index 144ea81b5e68..63792fd1d889 100644
--- a/gcc/testsuite/objc.dg/super-class-2.m
+++ b/gcc/testsuite/objc.dg/super-class-2.m
@@ -1,6 +1,7 @@
 /* Test calling super from within a category class method.  */
 /* Author: Ziemowit Laski <zlaski@apple.com>  */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct objc_object { struct objc_class *isa; } *id;
 
diff --git a/gcc/testsuite/objc.dg/super-dealloc-1.m b/gcc/testsuite/objc.dg/super-dealloc-1.m
index 0ab177bb73c9..035de055b25f 100644
--- a/gcc/testsuite/objc.dg/super-dealloc-1.m
+++ b/gcc/testsuite/objc.dg/super-dealloc-1.m
@@ -2,6 +2,7 @@
 /* Author: Ziemowit Laski <zlaski@apple.com>  */
 
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface Foo {
   void *isa;
diff --git a/gcc/testsuite/objc.dg/super-dealloc-2.m b/gcc/testsuite/objc.dg/super-dealloc-2.m
index 80dcf495062d..5d588c50fa96 100644
--- a/gcc/testsuite/objc.dg/super-dealloc-2.m
+++ b/gcc/testsuite/objc.dg/super-dealloc-2.m
@@ -2,6 +2,7 @@
 /* Author: Ziemowit Laski <zlaski@apple.com>  */
 
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface Foo {
   void *isa;
diff --git a/gcc/testsuite/objc.dg/sync-3.m b/gcc/testsuite/objc.dg/sync-3.m
index 5cee890bba2e..6ef72a1a4c21 100644
--- a/gcc/testsuite/objc.dg/sync-3.m
+++ b/gcc/testsuite/objc.dg/sync-3.m
@@ -1,6 +1,7 @@
 /* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, December 2010.  */
 /* { dg-options "-fobjc-exceptions" } */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 /* Test that the compiler is checking the argument of @synchronized(),
    and produce errors when invalid types are used.  */
diff --git a/gcc/testsuite/objc.dg/threedotthree-abi-1.m b/gcc/testsuite/objc.dg/threedotthree-abi-1.m
index 53154d321baf..8c22850e094f 100644
--- a/gcc/testsuite/objc.dg/threedotthree-abi-1.m
+++ b/gcc/testsuite/objc.dg/threedotthree-abi-1.m
@@ -3,6 +3,7 @@
 /* { dg-do run { target *-*-darwin* } } */
 /* { dg-require-effective-target ilp32 } */
 /* { dg-skip-if "" { *-*-* } { "-fgnu-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <stdio.h>
 #include <string.h>
diff --git a/gcc/testsuite/objc.dg/torture/dg-torture.exp b/gcc/testsuite/objc.dg/torture/dg-torture.exp
index 28c2359392b3..11f50fc1dedb 100644
--- a/gcc/testsuite/objc.dg/torture/dg-torture.exp
+++ b/gcc/testsuite/objc.dg/torture/dg-torture.exp
@@ -7,11 +7,11 @@ dg-init
 # Gather a list of all tests.
 set tests [lsort [glob -nocomplain $srcdir/$subdir/*.m]]
 
-objc-dg-runtest $tests "" "-fgnu-runtime"
+objc-dg-runtest $tests "" "-fgnu-runtime -Wno-objc-root-class"
 
 # darwin targets can also run code with the NeXT runtime.
 if [istarget "*-*-darwin*" ] {
-  objc-dg-runtest $tests "" "-fnext-runtime"
+  objc-dg-runtest $tests "" "-fnext-runtime -Wno-objc-root-class"
 }
 
 dg-finish
diff --git a/gcc/testsuite/objc.dg/torture/strings/strings.exp b/gcc/testsuite/objc.dg/torture/strings/strings.exp
index 64e53c6c23f5..3e2b3b0bd03d 100644
--- a/gcc/testsuite/objc.dg/torture/strings/strings.exp
+++ b/gcc/testsuite/objc.dg/torture/strings/strings.exp
@@ -24,11 +24,11 @@ dg-init
 # Gather a list of all tests.
 set tests [lsort [glob -nocomplain $srcdir/$subdir/*.m]]
 
-objc-dg-runtest $tests "" "-fgnu-runtime"
+objc-dg-runtest $tests "" "-fgnu-runtime -Wno-objc-root-class"
 
 # Darwin targets also test with the NeXT runtime.
 if [istarget "*-*-darwin*" ] {
-  objc-dg-runtest $tests "" "-fnext-runtime"
+  objc-dg-runtest $tests "" "-fnext-runtime -Wno-objc-root-class"
 }
 
 dg-finish
diff --git a/gcc/testsuite/objc.dg/try-catch-11.m b/gcc/testsuite/objc.dg/try-catch-11.m
index e08f321e8c79..c792c83062f0 100644
--- a/gcc/testsuite/objc.dg/try-catch-11.m
+++ b/gcc/testsuite/objc.dg/try-catch-11.m
@@ -4,6 +4,7 @@
 
 /* { dg-options "-fobjc-exceptions" } */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef volatile int IOSharedLockData;
 
diff --git a/gcc/testsuite/objc.dg/try-catch-12.m b/gcc/testsuite/objc.dg/try-catch-12.m
index ce26b32d32bb..6c9afc26de7e 100644
--- a/gcc/testsuite/objc.dg/try-catch-12.m
+++ b/gcc/testsuite/objc.dg/try-catch-12.m
@@ -4,6 +4,7 @@
 
 /* { dg-options "-fobjc-exceptions" } */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface TestMyTests
 - (void) testSpoon;
diff --git a/gcc/testsuite/objc.dg/type-size-2.m b/gcc/testsuite/objc.dg/type-size-2.m
index d02a8af219e1..64444cfe2550 100644
--- a/gcc/testsuite/objc.dg/type-size-2.m
+++ b/gcc/testsuite/objc.dg/type-size-2.m
@@ -4,6 +4,7 @@
 /* Contributed by Ziemowit Laski <zlaski@apple.com>.  */
 /* { dg-do run } */
 /* { dg-xfail-run-if "Needs OBJC2 ABI" { *-*-darwin* && { lp64 && { ! objc2 } } } { "-fnext-runtime" } { "" } } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include "../objc-obj-c++-shared/runtime.h"
 #include <stdio.h>
diff --git a/gcc/testsuite/objc.dg/type-size-3.m b/gcc/testsuite/objc.dg/type-size-3.m
index bc66b0be67a0..3f65516e75e4 100644
--- a/gcc/testsuite/objc.dg/type-size-3.m
+++ b/gcc/testsuite/objc.dg/type-size-3.m
@@ -1,6 +1,7 @@
 /* Reject ivars that use flexible array members.  */
 /* Contributed by Nicola Pero  <nicola.pero@meta-innovation.com> */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct
 {
diff --git a/gcc/testsuite/objc.dg/type-size-4.m b/gcc/testsuite/objc.dg/type-size-4.m
index 7e26da34a43d..f10ed5b0118f 100644
--- a/gcc/testsuite/objc.dg/type-size-4.m
+++ b/gcc/testsuite/objc.dg/type-size-4.m
@@ -2,6 +2,7 @@
 /* Contributed by Nicola Pero  <nicola.pero@meta-innovation.com> */
 /* PR objc/47832 */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct
 {
diff --git a/gcc/testsuite/objc.dg/type-size-5.m b/gcc/testsuite/objc.dg/type-size-5.m
index d89af32b452e..e1b11f7eef54 100644
--- a/gcc/testsuite/objc.dg/type-size-5.m
+++ b/gcc/testsuite/objc.dg/type-size-5.m
@@ -1,6 +1,7 @@
 /* Reject ivars that use flexible array members.  */
 /* Contributed by Nicola Pero  <nicola.pero@meta-innovation.com> */
 /* { dg-do compile } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 typedef struct
 {
diff --git a/gcc/testsuite/objc.dg/undeclared-selector.m b/gcc/testsuite/objc.dg/undeclared-selector.m
index 1cfc6c834812..389b0321817b 100644
--- a/gcc/testsuite/objc.dg/undeclared-selector.m
+++ b/gcc/testsuite/objc.dg/undeclared-selector.m
@@ -2,6 +2,7 @@
 /* Author: Nicola Pero <nicola@brainstorm.co.uk>.  */
 /* { dg-do compile } */
 /* { dg-options "-Wundeclared-selector" } */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 #include <objc/objc.h>
 
diff --git a/gcc/testsuite/objc.dg/volatile-1.m b/gcc/testsuite/objc.dg/volatile-1.m
index 8b5381a9874c..a71363163924 100644
--- a/gcc/testsuite/objc.dg/volatile-1.m
+++ b/gcc/testsuite/objc.dg/volatile-1.m
@@ -1,7 +1,8 @@
 /* Test for proper handling of volatile parameters in ObjC methods.  */
+/* Contributed by Ziemowit Laski  <zlaski@apple.com>  */
 /* { dg-do compile } */
 /* { dg-options "-O2" } */
-/* Contributed by Ziemowit Laski  <zlaski@apple.com>  */
+/* { dg-additional-options "-Wno-objc-root-class" } */
 
 @interface Test
 -(void) test2: (volatile int) a;