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, 61 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/18_support/numeric_limits/traps.cc b/libstdc++-v3/testsuite/18_support/numeric_limits/traps.cc
new file mode 100644
index 000000000..39c5576fa
--- /dev/null
+++ b/libstdc++-v3/testsuite/18_support/numeric_limits/traps.cc
@@ -0,0 +1,61 @@
+// { dg-add-options ieee }
+
+// Copyright (C) 2005, 2009 Free Software Foundation
+//
+// This file is part of the GNU ISO C++ Library.  This library 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.
+
+// This library 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.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// 18.2.1.1 template class numeric_limits
+
+#include <limits>
+#include <testsuite_hooks.h>
+
+template<typename T>
+  void 
+  test_traps(T r = T(0))
+  {
+    typedef T value_type;
+    volatile value_type i(5);
+    volatile value_type j(0);
+    
+    if (!std::numeric_limits<value_type>::traps)
+      r = i / j;
+  }
+
+// libstdc++/22203
+int main()
+{
+  test_traps<int>();
+  test_traps<unsigned int>();
+  test_traps<long>();
+  test_traps<unsigned long>();
+  test_traps<long long>();
+  test_traps<unsigned long long>();
+ 
+  /*
+    For floating points, trapping is a different, more complicated
+    story.  If is_iecxxx is true, then division by zero would not trap
+    (infinity).  If is_iecxxx is false, we don't know (VAX may trap for
+    0/0 -- I have to check).  For most cases (i.e. IEE-754), trapping
+    for floating points have to do with whether there is a support for
+    signaling NaN.
+    - Gaby.
+  */
+  //  test_traps<float>();
+  //  test_traps<double>();
+  //  test_traps<long double>();
+
+  return 0;
+}