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, 108 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/close/char/4879.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/close/char/4879.cc
new file mode 100644
index 000000000..9d2c647ca
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/close/char/4879.cc
@@ -0,0 +1,108 @@
+// { dg-require-fork "" }
+// { dg-require-mkfifo "" }
+ 
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
+// Free Software Foundation, Inc.
+//
+// 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/>.
+
+// 27.8.1.3 filebuf member functions
+// @require@ %-*.tst %-*.txt
+// @diff@ %-*.tst %-*.txt
+
+// various tests for filebuf::open() and filebuf::close() including
+// the non-portable functionality in the libstdc++-v3 IO library
+
+#include <fstream>
+#include <iostream>
+#include <cstdlib>
+#include <unistd.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+// No asserts, avoid leaking the semaphores if a VERIFY fails.
+#undef _GLIBCXX_ASSERT
+
+#include <testsuite_hooks.h>
+
+// libstdc++/2913, libstdc++/4879
+// John Fardo  <jfardo@laurelnetworks.com>, Brad Garcia <garsh@attbi.com>
+bool
+test_04()
+{
+  using namespace __gnu_test;
+
+  bool test __attribute__((unused)) = true;
+  const char* name = "tmp_fifo1";
+  semaphore s1, s2;
+
+  signal(SIGPIPE, SIG_IGN);
+  
+  unlink(name);
+  if (0 != mkfifo(name, S_IRWXU))
+    {
+      std::cerr << "failed to create fifo" << std::endl;
+      exit(-1);
+    }
+  
+  int fval = fork();
+  if (fval == -1)
+    {
+      std::cerr << "failed to fork" << std::endl;
+      unlink(name);
+      return false;
+    }
+  else if (fval == 0)
+    {
+      std::ifstream ifs(name);
+      s1.wait();
+      ifs.close();
+      s2.signal();
+      exit(0);
+    }
+
+  std::ofstream ofs(name);
+  s1.signal();
+  s2.wait();
+  ofs.put('t');
+
+  /*
+   * ISO/IED 14882:1998(E) 27.8.1.10.4
+   *
+   * void close();
+   *
+   * Effects:  Calls rdbuf()->close() and, if that function fails
+   * (returns a null pointer), calls setstate(failbit)...
+   */
+  ofs.close();
+  if (!(ofs.rdstate() & std::ios::failbit))
+    {
+      test = false;
+      VERIFY( test );
+    }
+
+  unlink(name);
+
+  return test;
+}
+
+int
+main()
+{
+  return !test_04();
+}