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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5 files changed, 302 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/1.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/1.cc
new file mode 100644
index 000000000..42688e825
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/1.cc
@@ -0,0 +1,89 @@
+// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
+
+// Copyright (C) 2001, 2002, 2003, 2009, 2010 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/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+// { dg-require-fileio "" }
+
+#include <fstream>
+#include <testsuite_hooks.h>
+
+class testbuf : public std::filebuf
+{
+public:
+
+  // Typedefs:
+  typedef std::filebuf base_type;
+  typedef base_type::traits_type traits_type;
+  typedef base_type::char_type char_type;
+
+  testbuf(): base_type() 
+  { _M_mode = (std::ios_base::in | std::ios_base::out); }
+
+  bool
+  check_pointers()
+  { 
+    bool test __attribute__((unused)) = true;
+    test = (!this->pbase());
+    test &= (!this->pptr());
+    return test;
+  }
+};
+
+const char name_01[] = "filebuf_virtuals-1.txt";
+
+// Test overloaded virtual functions.
+void test05() 
+{
+  using namespace std;
+  typedef std::filebuf::int_type 	int_type;
+  typedef std::filebuf::traits_type 	traits_type;
+  typedef std::filebuf::pos_type 	pos_type;
+  typedef std::filebuf::off_type 	off_type;
+  typedef size_t 			size_type;
+
+  bool test __attribute__((unused)) = true;
+
+  {
+    testbuf 				f_tmp;
+
+    // setbuf
+    // pubsetbuf(char_type* s, streamsize n)
+    f_tmp.pubsetbuf(0,0);
+    VERIFY( f_tmp.check_pointers() );
+  }
+
+  {
+    testbuf 				f_tmp;
+    
+    f_tmp.open(name_01, ios_base::out | ios_base::in);
+    f_tmp.sbumpc();
+    
+    // setbuf
+    // pubsetbuf(char_type* s, streamsize n)
+    f_tmp.pubsetbuf(0, 0);
+    VERIFY( f_tmp.check_pointers() );
+  }
+}
+
+int main() 
+{
+  test05();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/12875-1.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/12875-1.cc
new file mode 100644
index 000000000..ed567de1b
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/12875-1.cc
@@ -0,0 +1,58 @@
+// Copyright (C) 2003, 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/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+// { dg-require-fileio "" }
+
+#include <fstream>
+#include <cstdio>
+#include <cstring>
+#include <testsuite_hooks.h>
+
+// libstdc++/12875
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  const char* name = "tmp_setbuf4";
+  static char buf[1024];
+  
+  FILE* out = fopen(name, "w");
+  fputs("Hello, world", out);
+  fclose(out);
+  
+  filebuf in;
+  in.open(name, ios_base::in);
+  char str[256];
+  streamsize r = in.sgetn(str, 6);
+  VERIFY( r == 6 );
+  VERIFY( !memcmp(str, "Hello,", 6) );
+  in.pubsetbuf(buf, 1024);
+  r = in.sgetn(str, 6);
+  VERIFY( r == 6 );
+  VERIFY( !memcmp(str, " world", 6) );
+  in.close();
+}
+
+// libstdc++/12875
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/12875-2.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/12875-2.cc
new file mode 100644
index 000000000..b736b1460
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/12875-2.cc
@@ -0,0 +1,56 @@
+// Copyright (C) 2003, 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/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+// { dg-require-fileio "" }
+
+#include <fstream>
+#include <cstdio>
+#include <cstring>
+#include <testsuite_hooks.h>
+
+// libstdc++/12875
+void test02()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  const char* name = "tmp_setbuf5";
+  static char buf[1024];
+  
+  filebuf out;
+  out.open(name, ios_base::out);
+  streamsize r = out.sputn("Hello,", 6);
+  VERIFY( r == 6 );
+  out.pubsetbuf(buf, 1024);
+  r = out.sputn(" world", 6);
+  VERIFY( r == 6 );
+  VERIFY( out.close() );
+  
+  FILE* in = fopen(name, "r");
+  char str[256];
+  VERIFY( fgets(str, 256, in) );
+  VERIFY( !strcmp(str, "Hello, world") );
+  fclose(in);
+}
+
+int main()
+{
+  test02();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/2.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/2.cc
new file mode 100644
index 000000000..768285d75
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/2.cc
@@ -0,0 +1,48 @@
+// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
+
+// 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/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+// { dg-require-fileio "" }
+
+#include <fstream>
+#include <cstring>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  using namespace std;
+
+  bool test __attribute__((unused)) = true;
+  char buf[512];
+  const char* strlit = "how to tell a story and other essays: mark twain";
+  const size_t strlitsize = std::strlen(strlit);
+  filebuf fbuf;
+  fbuf.pubsetbuf(buf, 512);
+  fbuf.open("tmp_setbuf2", ios_base::out);
+  fbuf.sputn(strlit, strlitsize);
+  VERIFY( std::strncmp(strlit, buf, strlitsize) == 0 );
+}
+
+int main() 
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/3.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/3.cc
new file mode 100644
index 000000000..bdb3989c3
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/3.cc
@@ -0,0 +1,51 @@
+// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
+
+// 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/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+// { dg-require-fileio "" }
+
+#include <fstream>
+#include <cstring>
+#include <testsuite_hooks.h>
+
+void test03()
+{
+  using namespace std;
+
+  bool test __attribute__((unused)) = true;
+  char buf[512];
+  const char* strlit = "how to tell a story and other essays: mark twain";
+  const size_t strlitsize = std::strlen(strlit);
+  filebuf fbuf01;
+  // NB: +2 otherwise sputn is optimized to a direct write,
+  // bypassing the buffer.
+  fbuf01.pubsetbuf(buf, strlitsize + 2);
+  fbuf01.open("tmp_setbuf3", ios_base::out);
+
+  fbuf01.sputn(strlit, strlitsize);
+  VERIFY( std::strncmp(strlit, buf, strlitsize) == 0 );
+}
+
+int main() 
+{
+  test03();
+  return 0;
+}