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, 224 insertions, 0 deletions

diff --git a/libstdc++-v3/libsupc++/eh_ptr.cc b/libstdc++-v3/libsupc++/eh_ptr.cc
new file mode 100644
index 000000000..94c28427d
--- /dev/null
+++ b/libstdc++-v3/libsupc++/eh_ptr.cc
@@ -0,0 +1,224 @@
+// -*- C++ -*- Implement the members of exception_ptr.
+// Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// GCC is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+#include <bits/c++config.h>
+
+#ifdef _GLIBCXX_ATOMIC_BUILTINS_4
+
+#define _GLIBCXX_EH_PTR_COMPAT
+
+#include <exception>
+#include <bits/exception_ptr.h>
+#include "unwind-cxx.h"
+
+using namespace __cxxabiv1;
+
+std::__exception_ptr::exception_ptr::exception_ptr() throw()
+: _M_exception_object(0) { }
+
+
+std::__exception_ptr::exception_ptr::exception_ptr(void* obj) throw()
+: _M_exception_object(obj)  { _M_addref(); }
+
+
+std::__exception_ptr::exception_ptr::exception_ptr(__safe_bool) throw()
+: _M_exception_object(0) { }
+
+
+std::__exception_ptr::
+exception_ptr::exception_ptr(const exception_ptr& other) throw()
+: _M_exception_object(other._M_exception_object)
+{ _M_addref(); }
+
+
+std::__exception_ptr::exception_ptr::~exception_ptr() throw()
+{ _M_release(); }
+
+
+std::__exception_ptr::exception_ptr&
+std::__exception_ptr::
+exception_ptr::operator=(const exception_ptr& other) throw()
+{
+  exception_ptr(other).swap(*this);
+  return *this;
+}
+
+
+void
+std::__exception_ptr::exception_ptr::_M_addref() throw()
+{
+  if (_M_exception_object)
+    {
+      __cxa_refcounted_exception *eh =
+	__get_refcounted_exception_header_from_obj (_M_exception_object);
+      __sync_add_and_fetch (&eh->referenceCount, 1);
+    }
+}
+
+
+void
+std::__exception_ptr::exception_ptr::_M_release() throw()
+{
+  if (_M_exception_object)
+    {
+      __cxa_refcounted_exception *eh =
+	__get_refcounted_exception_header_from_obj (_M_exception_object);
+      if (__sync_sub_and_fetch (&eh->referenceCount, 1) == 0)
+        {
+	  if (eh->exc.exceptionDestructor)
+	    eh->exc.exceptionDestructor (_M_exception_object);
+
+          __cxa_free_exception (_M_exception_object);
+          _M_exception_object = 0;
+        }
+    }
+}
+
+
+void*
+std::__exception_ptr::exception_ptr::_M_get() const throw()
+{ return _M_exception_object; }
+
+
+void
+std::__exception_ptr::exception_ptr::swap(exception_ptr &other) throw()
+{
+  void *tmp = _M_exception_object;
+  _M_exception_object = other._M_exception_object;
+  other._M_exception_object = tmp;
+}
+
+
+// Retained for compatibility with CXXABI_1.3.
+void
+std::__exception_ptr::exception_ptr::_M_safe_bool_dummy() throw () { }
+
+
+// Retained for compatibility with CXXABI_1.3.
+bool
+std::__exception_ptr::exception_ptr::operator!() const throw()
+{ return _M_exception_object == 0; }
+
+
+// Retained for compatibility with CXXABI_1.3.
+std::__exception_ptr::exception_ptr::operator __safe_bool() const throw()
+{
+  return _M_exception_object ? &exception_ptr::_M_safe_bool_dummy : 0;
+}
+
+
+const std::type_info*
+std::__exception_ptr::exception_ptr::__cxa_exception_type() const throw()
+{
+  __cxa_exception *eh = __get_exception_header_from_obj (_M_exception_object);
+  return eh->exceptionType;
+}
+
+
+bool std::__exception_ptr::operator==(const exception_ptr& lhs,
+				      const exception_ptr& rhs) throw()
+{ return lhs._M_exception_object == rhs._M_exception_object; }
+
+
+bool std::__exception_ptr::operator!=(const exception_ptr& lhs,
+				      const exception_ptr& rhs) throw()
+{ return !(lhs == rhs);}
+
+
+std::exception_ptr
+std::current_exception() throw()
+{
+  __cxa_eh_globals *globals = __cxa_get_globals ();
+  __cxa_exception *header = globals->caughtExceptions;
+
+  if (!header)
+    return std::exception_ptr();
+
+  // Since foreign exceptions can't be counted, we can't return them.
+  if (!__is_gxx_exception_class (header->unwindHeader.exception_class))
+    return std::exception_ptr();
+
+  return std::exception_ptr(
+    __get_object_from_ambiguous_exception (header));
+}
+
+
+static void
+__gxx_dependent_exception_cleanup(_Unwind_Reason_Code code,
+				  _Unwind_Exception *exc)
+{
+  // This cleanup is set only for dependents.
+  __cxa_dependent_exception *dep = __get_dependent_exception_from_ue (exc);
+  __cxa_refcounted_exception *header =
+    __get_refcounted_exception_header_from_obj (dep->primaryException);
+
+  // We only want to be called through _Unwind_DeleteException.
+  // _Unwind_DeleteException in the HP-UX IA64 libunwind library
+  // returns _URC_NO_REASON and not _URC_FOREIGN_EXCEPTION_CAUGHT
+  // like the GCC _Unwind_DeleteException function does.
+  if (code != _URC_FOREIGN_EXCEPTION_CAUGHT && code != _URC_NO_REASON)
+    __terminate (header->exc.terminateHandler);
+
+  __cxa_free_dependent_exception (dep);
+
+  if (__sync_sub_and_fetch (&header->referenceCount, 1) == 0)
+    {
+      if (header->exc.exceptionDestructor)
+	header->exc.exceptionDestructor (header + 1);
+
+      __cxa_free_exception (header + 1);
+    }
+}
+
+
+void
+std::rethrow_exception(std::exception_ptr ep)
+{
+  void *obj = ep._M_get();
+  __cxa_refcounted_exception *eh
+    = __get_refcounted_exception_header_from_obj (obj);
+
+  __cxa_dependent_exception *dep = __cxa_allocate_dependent_exception ();
+  dep->primaryException = obj;
+  __sync_add_and_fetch (&eh->referenceCount, 1);
+
+  dep->unexpectedHandler = __unexpected_handler;
+  dep->terminateHandler = __terminate_handler;
+  __GXX_INIT_DEPENDENT_EXCEPTION_CLASS(dep->unwindHeader.exception_class);
+  dep->unwindHeader.exception_cleanup = __gxx_dependent_exception_cleanup;
+
+#ifdef _GLIBCXX_SJLJ_EXCEPTIONS
+  _Unwind_SjLj_RaiseException (&dep->unwindHeader);
+#else
+  _Unwind_RaiseException (&dep->unwindHeader);
+#endif
+
+  // Some sort of unwinding error.  Note that terminate is a handler.
+  __cxa_begin_catch (&dep->unwindHeader);
+  std::terminate();
+}
+
+#undef _GLIBCXX_EH_PTR_COMPAT
+
+#endif