diff --git a/MozillaThunderbird.changes b/MozillaThunderbird.changes
index b3a6ca5..26a5a1a 100644
--- a/MozillaThunderbird.changes
+++ b/MozillaThunderbird.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Fri Mar 25 08:50:30 UTC 2011 - idoenmez@novell.com
+
+- Add mozilla-gcc46.patch: fix compilation with gcc 4.6
+  See the following bug reports:
+    https://bugzilla.mozilla.org/show_bug.cgi?id=623116
+    https://bugzilla.mozilla.org/show_bug.cgi?id=623123
+    https://bugzilla.mozilla.org/show_bug.cgi?id=623126
+    https://bugzilla.mozilla.org/show_bug.cgi?id=628371 
+
 -------------------------------------------------------------------
 Tue Feb 22 08:51:12 UTC 2011 - wr@rosenauer.org
 
diff --git a/MozillaThunderbird.spec b/MozillaThunderbird.spec
index 26e36cb..139a2ba 100644
--- a/MozillaThunderbird.spec
+++ b/MozillaThunderbird.spec
@@ -52,6 +52,7 @@ Patch9:         mozilla-shared-nss-db.patch
 Patch10:        mozilla-gdk-pixbuf.patch
 Patch11:        thunderbird-shared-nss-db.patch
 Patch13:        mozilla-xsmp.patch
+Patch14:        mozilla-gcc46.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 PreReq:         coreutils fileutils textutils /bin/sh
 ### build options
@@ -166,6 +167,7 @@ pushd mozilla
 %patch9 -p1
 %patch10 -p1
 %patch13 -p1
+%patch14 -p1
 popd
 # comm-central patches
 %patch2 -p1
diff --git a/mozilla-gcc46.patch b/mozilla-gcc46.patch
new file mode 100644
index 0000000..425dfb7
--- /dev/null
+++ b/mozilla-gcc46.patch
@@ -0,0 +1,105 @@
+See the following bug reports;
+
+https://bugzilla.mozilla.org/show_bug.cgi?id=623116
+https://bugzilla.mozilla.org/show_bug.cgi?id=623123
+https://bugzilla.mozilla.org/show_bug.cgi?id=623126
+https://bugzilla.mozilla.org/show_bug.cgi?id=628371
+
+diff --git a/xpcom/base/nsDebugImpl.h b/xpcom/base/nsDebugImpl.h
+--- a/xpcom/base/nsDebugImpl.h
++++ b/xpcom/base/nsDebugImpl.h
+@@ -40,6 +40,7 @@
+ class nsDebugImpl : public nsIDebug2
+ {
+ public:
++    nsDebugImpl() {}
+     NS_DECL_ISUPPORTS
+     NS_DECL_NSIDEBUG
+     NS_DECL_NSIDEBUG2
+diff --git a/xpcom/base/nsTraceRefcntImpl.h b/xpcom/base/nsTraceRefcntImpl.h
+--- a/xpcom/base/nsTraceRefcntImpl.h
++++ b/xpcom/base/nsTraceRefcntImpl.h
+@@ -44,6 +44,7 @@
+ class nsTraceRefcntImpl : public nsITraceRefcnt
+ {
+ public:
++  nsTraceRefcntImpl() {}
+   NS_DECL_ISUPPORTS
+   NS_DECL_NSITRACEREFCNT
+ 
+diff --git a/xpcom/glue/nsEnumeratorUtils.cpp b/xpcom/glue/nsEnumeratorUtils.cpp
+--- a/xpcom/glue/nsEnumeratorUtils.cpp
++++ b/xpcom/glue/nsEnumeratorUtils.cpp
+@@ -52,6 +52,7 @@ class EmptyEnumeratorImpl : public nsISi
+                             public nsIStringEnumerator
+ {
+ public:
++    EmptyEnumeratorImpl() {}
+     // nsISupports interface
+     NS_DECL_ISUPPORTS_INHERITED  // not really inherited, but no mRefCnt
+ 
+diff --git a/xpcom/io/nsUnicharInputStream.h b/xpcom/io/nsUnicharInputStream.h
+--- a/xpcom/io/nsUnicharInputStream.h
++++ b/xpcom/io/nsUnicharInputStream.h
+@@ -51,6 +51,7 @@ class nsSimpleUnicharStreamFactory :
+   private nsISimpleUnicharStreamFactory
+ {
+ public:
++  nsSimpleUnicharStreamFactory() {}
+   NS_DECL_ISUPPORTS_INHERITED
+   NS_DECL_NSIFACTORY
+   NS_DECL_NSISIMPLEUNICHARSTREAMFACTORY
+diff --git a/intl/unicharutil/util/nsUnicharUtils.h b/intl/unicharutil/util/nsUnicharUtils.h
+--- a/intl/unicharutil/util/nsUnicharUtils.h
++++ b/intl/unicharutil/util/nsUnicharUtils.h
+@@ -103,6 +103,7 @@ public:
+ class nsCaseInsensitiveStringComparator : public nsStringComparator
+ {
+ public:
++  nsCaseInsensitiveStringComparator() {}
+   virtual int operator() (const PRUnichar*,
+                           const PRUnichar*,
+                           PRUint32 aLength) const;
+diff --git a/toolkit/xre/nsAppRunner.cpp b/toolkit/xre/nsAppRunner.cpp
+--- a/toolkit/xre/nsAppRunner.cpp
++++ b/toolkit/xre/nsAppRunner.cpp
+@@ -616,6 +616,7 @@ class nsXULAppInfo : public nsIXULAppInf
+ 
+ {
+ public:
++  nsXULAppInfo() {}
+   NS_DECL_ISUPPORTS_INHERITED
+   NS_DECL_NSIXULAPPINFO
+   NS_DECL_NSIXULRUNTIME
+diff --git a/embedding/browser/gtk/src/EmbedPrivate.cpp b/embedding/browser/gtk/src/EmbedPrivate.cpp
+index 57fd9b1..0052ca7 100644
+--- a/embedding/browser/gtk/src/EmbedPrivate.cpp
++++ b/embedding/browser/gtk/src/EmbedPrivate.cpp
+@@ -99,6 +99,7 @@ nsIDirectoryServiceProvider *EmbedPrivate::sAppFileLocProvider = nsnull;
+ class GTKEmbedDirectoryProvider : public nsIDirectoryServiceProvider2
+ {
+ public:
++  GTKEmbedDirectoryProvider() {}
+   NS_DECL_ISUPPORTS_INHERITED
+   NS_DECL_NSIDIRECTORYSERVICEPROVIDER
+   NS_DECL_NSIDIRECTORYSERVICEPROVIDER2
+--- a/gfx/ots/src/os2.cc	2011-02-22 09:34:58.000000000 +0100
++++ b/gfx/ots/src/os2.cc	2011-03-25 10:08:02.183485823 +0100
+@@ -5,6 +5,7 @@
+ #include "os2.h"
+ 
+ #include "head.h"
++#include <stddef.h>
+ 
+ // OS/2 - OS/2 and Windows Metrics
+ // http://www.microsoft.com/opentype/otspec/os2.htm
+--- a/toolkit/crashreporter/google-breakpad/src/common/linux/language.cc	2011-02-22 09:35:48.000000000 +0100
++++ b/toolkit/crashreporter/google-breakpad/src/common/linux/language.cc	2011-03-25 10:33:34.367485573 +0100
+@@ -39,6 +39,7 @@
+ // C++ language-specific operations.
+ class CPPLanguage: public Language {
+  public:
++  CPPLanguage() {};
+   string MakeQualifiedName(const string &parent_name,
+                            const string &name) const {
+     if (parent_name.empty())