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, 67 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/18_support/numeric_limits/max_digits10.cc b/libstdc++-v3/testsuite/18_support/numeric_limits/max_digits10.cc
new file mode 100644
index 000000000..fdce19c36
--- /dev/null
+++ b/libstdc++-v3/testsuite/18_support/numeric_limits/max_digits10.cc
@@ -0,0 +1,67 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-add-options ieee }
+
+// 2010-02-25  Ed Smith-Rowland
+
+// Copyright (C) 2010 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 <cmath>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  VERIFY( std::numeric_limits<bool>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<char>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<signed char>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<unsigned char>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<wchar_t>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<short>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<unsigned short>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<int>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<unsigned int>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<long>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<unsigned long>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<long long>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<unsigned long long>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<char16_t>::max_digits10 == 0 );
+  VERIFY( std::numeric_limits<char32_t>::max_digits10 == 0 );
+
+  const int f_max_digits10 = (2 + std::numeric_limits<float>::digits
+			      * 643 / 2136);
+  VERIFY( std::numeric_limits<float>::max_digits10 == f_max_digits10 );
+
+  const int d_max_digits10 = (2 + std::numeric_limits<double>::digits
+			      * 643 / 2136);
+  VERIFY( std::numeric_limits<double>::max_digits10 == d_max_digits10 );
+
+  const int ld_max_digits10 = (2 + std::numeric_limits<long double>::digits
+			       * 643 / 2136);
+  VERIFY( std::numeric_limits<long double>::max_digits10 == ld_max_digits10 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}