stdio_filebuf.h: New file.

2002-04-30  Benjamin Kosnik  <bkoz@redhat.com>

	* include/ext/stdio_filebuf.h: New file.
	* include/ext/enc_filebuf.h: New file.
	* config/io/basic_file_stdio.h (__basic_file::sys_open): Add fd ctor.
	* config/io/basic_file_stdio.cc: Same.
	* include/bits/fstream.tcc (filebuf::_M_allocate_internal_buffer):
	Remove _M_unbuf hacks.
	(filebuf::_M_destroy_internal_buffer): Same.
	(filebuf::filebuf(cfile, openmode, int_type): Remove definition.
	(filebuf::fd): Remove.
	* include/std/std_fstream.h (filebuf::_M_unbuf): Remove.
	(filebuf::filebuf(__c_file*, openmode, int_type)): Remove.
	(filebuf::fd): Remove.
	* src/ios.cc (ios_base::_S_ios_create): Change to use specialized
	filebufs.
	(ios_base::_S_ios_destroy): Same.
	* src/misc-inst.cc (file_filebuf<char>): Add instantiation.
	* include/Makefile.am (ext_headers): Add ext_filebuf.h,
	stdio_filebuf.h.  * include/Makefile.in: Regenerate.

From-SVN: r52961

13 files changed, 285 insertions, 97 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 0b12903..fd02dba 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,26 @@
 2002-04-30  Benjamin Kosnik  <bkoz@redhat.com>
 
+	* include/ext/stdio_filebuf.h: New file.
+	* include/ext/enc_filebuf.h: New file.	
+	* config/io/basic_file_stdio.h (__basic_file::sys_open): Add fd ctor.
+	* config/io/basic_file_stdio.cc: Same.	
+	* include/bits/fstream.tcc (filebuf::_M_allocate_internal_buffer):
+	Remove _M_unbuf hacks.
+	(filebuf::_M_destroy_internal_buffer): Same.
+	(filebuf::filebuf(cfile, openmode, int_type): Remove definition.
+	(filebuf::fd): Remove.
+	* include/std/std_fstream.h (filebuf::_M_unbuf): Remove.
+	(filebuf::filebuf(__c_file*, openmode, int_type)): Remove.
+	(filebuf::fd): Remove.	
+	* src/ios.cc (ios_base::_S_ios_create): Change to use specialized
+	filebufs.
+	(ios_base::_S_ios_destroy): Same.
+	* src/misc-inst.cc (file_filebuf<char>): Add instantiation.
+	* include/Makefile.am (ext_headers): Add ext_filebuf.h,
+	stdio_filebuf.h.  * include/Makefile.in: Regenerate.
+
+2002-04-30  Benjamin Kosnik  <bkoz@redhat.com>
+
 	PR libstdc++/6511
 	* config/os/solaris/solaris2.7/bits/ctype_noninline.h: Fix typo.
 
diff --git a/libstdc++-v3/config/io/basic_file_stdio.cc b/libstdc++-v3/config/io/basic_file_stdio.cc
index 25c93e3..93ca6bc 100644
--- a/libstdc++-v3/config/io/basic_file_stdio.cc
+++ b/libstdc++-v3/config/io/basic_file_stdio.cc
@@ -74,8 +74,31 @@ namespace std
     __basic_file* __ret = NULL;
     if (!this->is_open() && __file)
       {
-	_M_cfile = __file;
-	_M_cfile_created = false;
+ 	_M_cfile = __file;
+ 	_M_cfile_created = false;
+  	__ret = this;
+      }
+    return __ret;
+  }
+  
+  __basic_file<char>*
+  __basic_file<char>::sys_open(int __fd, ios_base::openmode __mode, 
+			       bool __del) 
+  {
+    __basic_file* __ret = NULL;
+    int __p_mode = 0;
+    int __rw_mode = 0;
+    char __c_mode[4];
+    
+    _M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
+    if (!this->is_open() && (_M_cfile = fdopen(__fd, __c_mode)))
+      {
+	// Iff __del is true, then close will fclose the fd.
+	_M_cfile_created = __del;
+
+	if (__fd == 0)
+	  setvbuf(_M_cfile, reinterpret_cast<char*>(NULL), _IONBF, 0);
+
 	__ret = this;
       }
     return __ret;
@@ -84,7 +107,7 @@ namespace std
   int
   __basic_file<char>::sys_getc() 
   { return getc(_M_cfile); }
-  
+
   int
   __basic_file<char>::sys_ungetc(int __c) 
   { return ungetc(__c, _M_cfile); }
@@ -112,10 +135,12 @@ namespace std
   }
   
   bool 
-  __basic_file<char>::is_open() const { return _M_cfile != 0; }
+  __basic_file<char>::is_open() const 
+  { return _M_cfile != 0; }
   
   int 
-  __basic_file<char>::fd() { return fileno(_M_cfile) ; }
+  __basic_file<char>::fd() 
+  { return fileno(_M_cfile) ; }
   
   __basic_file<char>* 
   __basic_file<char>::close()
@@ -157,5 +182,6 @@ namespace std
   }
   
   int 
-  __basic_file<char>::sync() { return fflush(_M_cfile); }
+  __basic_file<char>::sync() 
+  { return fflush(_M_cfile); }
 }  // namespace std
diff --git a/libstdc++-v3/config/io/basic_file_stdio.h b/libstdc++-v3/config/io/basic_file_stdio.h
index 137dfec..fe6edbb 100644
--- a/libstdc++-v3/config/io/basic_file_stdio.h
+++ b/libstdc++-v3/config/io/basic_file_stdio.h
@@ -70,7 +70,10 @@ namespace std
       open(const char* __name, ios_base::openmode __mode, int __prot = 0664);
 
       __basic_file*
-      sys_open(__c_file* __file, ios_base::openmode __mode);
+      sys_open(__c_file* __file, ios_base::openmode);
+
+      __basic_file*
+      sys_open(int __fd, ios_base::openmode __mode, bool __del);
 
       int
       sys_getc();
diff --git a/libstdc++-v3/include/Makefile.am b/libstdc++-v3/include/Makefile.am
index cfeb03e..38d1f7b 100644
--- a/libstdc++-v3/include/Makefile.am
+++ b/libstdc++-v3/include/Makefile.am
@@ -143,6 +143,8 @@ ext_srcdir = ${glibcpp_srcdir}/include/ext
 ext_builddir = ./ext
 ext_headers = \
 	${ext_srcdir}/algorithm \
+	${ext_srcdir}/enc_filebuf.h \
+	${ext_srcdir}/stdio_filebuf.h \
 	${ext_srcdir}/functional \
 	${ext_srcdir}/hash_map \
 	${ext_srcdir}/hash_set \
diff --git a/libstdc++-v3/include/Makefile.in b/libstdc++-v3/include/Makefile.in
index c24c6e2..4a2cecd 100644
--- a/libstdc++-v3/include/Makefile.in
+++ b/libstdc++-v3/include/Makefile.in
@@ -272,6 +272,8 @@ ext_srcdir = ${glibcpp_srcdir}/include/ext
 ext_builddir = ./ext
 ext_headers = \
 	${ext_srcdir}/algorithm \
+	${ext_srcdir}/enc_filebuf.h \
+	${ext_srcdir}/stdio_filebuf.h \
 	${ext_srcdir}/functional \
 	${ext_srcdir}/hash_map \
 	${ext_srcdir}/hash_set \
diff --git a/libstdc++-v3/include/bits/fstream.tcc b/libstdc++-v3/include/bits/fstream.tcc
index 910209a..40b9f32 100644
--- a/libstdc++-v3/include/bits/fstream.tcc
+++ b/libstdc++-v3/include/bits/fstream.tcc
@@ -48,19 +48,14 @@ namespace std
 	{
 	  _M_buf_size = _M_buf_size_opt;
 
-	  if (_M_buf_size != 1)
+	  // Allocate internal buffer.
+	  try { _M_buf = new char_type[_M_buf_size]; }
+	  catch(...) 
 	    {
-	      // Allocate internal buffer.
-	      try { _M_buf = new char_type[_M_buf_size]; }
-	      catch(...) 
-		{
-		  delete [] _M_buf;
-		  __throw_exception_again;
-		}
-	      _M_buf_allocated = true;
+	      delete [] _M_buf;
+	      __throw_exception_again;
 	    }
-	  else
-	    _M_buf = _M_unbuf;
+	  _M_buf_allocated = true;
 	}
     }
 
@@ -78,53 +73,16 @@ namespace std
 	  this->setg(NULL, NULL, NULL);
 	  this->setp(NULL, NULL);
 	}
-      else
-	{
-	  if (_M_buf == _M_unbuf)
-	    {
-	      _M_buf = NULL;
-	      this->setg(NULL, NULL, NULL);
-	      this->setp(NULL, NULL);
-	    }
-	}
     }
 
   template<typename _CharT, typename _Traits>
     basic_filebuf<_CharT, _Traits>::
-    basic_filebuf() 
-    : __streambuf_type(), _M_file(&_M_lock), _M_state_cur(__state_type()), 
-    _M_state_beg(__state_type()), _M_buf_allocated(false), 
-    _M_last_overflowed(false)
+    basic_filebuf() : __streambuf_type(), _M_file(&_M_lock), 
+    _M_state_cur(__state_type()), _M_state_beg(__state_type()), 
+    _M_buf_allocated(false), _M_last_overflowed(false)
     { _M_buf_unified = true; }
 
   template<typename _CharT, typename _Traits>
-    basic_filebuf<_CharT, _Traits>::
-    basic_filebuf(__c_file* __f, ios_base::openmode __mode, int_type __s)
-    : __streambuf_type(),  _M_file(&_M_lock), _M_state_cur(__state_type()), 
-    _M_state_beg(__state_type()), _M_buf_allocated(false), 
-    _M_last_overflowed(false)
-    {
-      _M_buf_unified = true; 
-      _M_file.sys_open(__f, __mode);
-      if (this->is_open())
-	{
-	  _M_mode = __mode;
-	  if (__s)
-	    {
-	      _M_buf_size_opt = __s;
-	      _M_allocate_internal_buffer();
-	      _M_set_indeterminate();
-	    }
-	}
-    }
-
-  template<typename _CharT, typename _Traits>
-    int
-    basic_filebuf<_CharT, _Traits>::
-    fd()
-    { return _M_file.fd(); }
-
-  template<typename _CharT, typename _Traits>
     typename basic_filebuf<_CharT, _Traits>::__filebuf_type* 
     basic_filebuf<_CharT, _Traits>::
     open(const char* __s, ios_base::openmode __mode)
diff --git a/libstdc++-v3/include/ext/enc_filebuf.h b/libstdc++-v3/include/ext/enc_filebuf.h
new file mode 100644
index 0000000..e1152bd
--- /dev/null
+++ b/libstdc++-v3/include/ext/enc_filebuf.h
@@ -0,0 +1,61 @@
+// __enc_traits layer for filebuf -*- C++ -*-
+
+// Copyright (C) 2002 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 2, 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 COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#include <fstream>
+#include <locale>
+
+namespace __gnu_cxx
+{
+  // Custom traits type with __enc_traits for state type, all other bits
+  // equivalent to the required char_traits instantiations.
+  template<typename _CharT>
+    struct enc_char_traits: public std::char_traits<_CharT>
+    {
+      typedef std::__enc_traits	state_type;
+    };
+
+  template<typename _CharT>
+    class enc_filebuf
+    : public std::basic_filebuf<_CharT, enc_char_traits<_CharT> >
+    {
+    public:
+      typedef typename enc_char_traits<_CharT>::state_type state_type;
+      
+      enc_filebuf(state_type& __state)
+      : std::basic_filebuf<_CharT, enc_char_traits<_CharT> >()
+      { 
+	// Set state type to something useful.
+	// Something more than copyconstructible is needed here, so
+	// require copyconstructible + assignment operator.
+	__glibcpp_class_requires(state_type, _SGIAssignableConcept);
+	_M_state_cur = __state;
+	_M_state_cur._M_init();
+      };
+    };
+} // namespace __gnu_cxx
diff --git a/libstdc++-v3/include/ext/stdio_filebuf.h b/libstdc++-v3/include/ext/stdio_filebuf.h
new file mode 100644
index 0000000..1b0d5ae
--- /dev/null
+++ b/libstdc++-v3/include/ext/stdio_filebuf.h
@@ -0,0 +1,113 @@
+// File descriptor layer for filebuf -*- C++ -*-
+
+// Copyright (C) 2002 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 2, 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 COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#include <fstream>
+
+namespace __gnu_cxx
+{
+  template<typename _CharT, typename _Traits = std::char_traits<_CharT> >
+    class stdio_filebuf : public std::basic_filebuf<_CharT, _Traits>
+    {
+    public:
+      // Types:
+      typedef _CharT                     	        char_type;
+      typedef _Traits                    	        traits_type;
+      typedef typename traits_type::int_type 		int_type;
+      typedef typename traits_type::pos_type 		pos_type;
+      typedef typename traits_type::off_type 		off_type;
+      
+    protected:
+      // Stack-based buffer for unbuffered input.
+      char_type			_M_unbuf[4];
+      
+    public:
+      stdio_filebuf(int __fd, std::ios_base::openmode __mode, bool __del, 
+		    int_type __size);
+
+      stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode, 
+		    int_type __size = static_cast<int_type>(BUFSIZ));
+
+      virtual
+      ~stdio_filebuf();
+
+      int
+      fd()
+      { return _M_file.fd(); }
+    };
+
+  template<typename _CharT, typename _Traits>
+    stdio_filebuf<_CharT, _Traits>::~stdio_filebuf()
+    { }
+
+  template<typename _CharT, typename _Traits>
+    stdio_filebuf<_CharT, _Traits>::
+    stdio_filebuf(int __fd, std::ios_base::openmode __mode, bool __del, 
+		  int_type __size)
+    {
+      _M_file.sys_open(__fd, __mode, __del);
+      if (this->is_open())
+	{
+	  _M_mode = __mode;
+	  _M_buf_size_opt = __size;
+	  
+	  if (__size > 0 && __size < 4)
+	    {
+	      _M_buf = _M_unbuf;
+	      _M_buf_size = __size;
+	    }
+	  else
+	    _M_allocate_internal_buffer();
+	  
+	  _M_set_indeterminate();
+	}
+    }
+
+  template<typename _CharT, typename _Traits>
+    stdio_filebuf<_CharT, _Traits>::
+    stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode, 
+		  int_type __size)
+    {
+      _M_file.sys_open(__f, __mode);
+      if (this->is_open())
+	{
+	  _M_mode = __mode;
+	  _M_buf_size_opt = __size;
+	  
+	  if (__size > 0 && __size < 4)
+	    {
+	      _M_buf = _M_unbuf;
+	      _M_buf_size = __size;
+	    }
+	  else
+	    _M_allocate_internal_buffer();
+	  
+	  _M_set_indeterminate();
+	}
+    }
+} // namespace __gnu_cxx
diff --git a/libstdc++-v3/include/std/std_fstream.h b/libstdc++-v3/include/std/std_fstream.h
index ce3a48e..fb95965 100644
--- a/libstdc++-v3/include/std/std_fstream.h
+++ b/libstdc++-v3/include/std/std_fstream.h
@@ -84,12 +84,9 @@ namespace std
       __state_type		_M_state_cur;
       __state_type 		_M_state_beg;
 
-      // Set iff _M_buf is allocated memory from _M_allocate_internal_buffer..
+      // Set iff _M_buf is allocated memory from _M_allocate_internal_buffer.
       bool			_M_buf_allocated;
       
-      // Stack-based buffer for unbuffered input.
-      char_type			_M_unbuf[4];
-
       // XXX Needed?
       bool			_M_last_overflowed;
 
@@ -101,14 +98,6 @@ namespace std
       // Constructors/destructor:
       basic_filebuf();
 
-      // Non-standard ctor:
-      basic_filebuf(__c_file* __f, ios_base::openmode __mode,
-		    int_type __s = static_cast<int_type>(BUFSIZ));
-
-      // Non-standard member:
-      int
-      fd();
-
       virtual
       ~basic_filebuf()
       {
diff --git a/libstdc++-v3/src/globals.cc b/libstdc++-v3/src/globals.cc
index cf9087f..36d193f 100644
--- a/libstdc++-v3/src/globals.cc
+++ b/libstdc++-v3/src/globals.cc
@@ -31,6 +31,7 @@
 #include <istream>
 #include <ostream>
 #include <locale>
+#include <ext/stdio_filebuf.h>
 
 // On AIX, and perhaps other systems, library initialization order is
 // not guaranteed.  For example, the static initializers for the main
@@ -176,8 +177,8 @@ namespace std
   fake_ostream cerr;
   fake_ostream clog;
 
-  typedef char fake_filebuf[sizeof(filebuf)]
-  __attribute__ ((aligned(__alignof__(filebuf))));
+  typedef char fake_filebuf[sizeof(__gnu_cxx::stdio_filebuf<char>)]
+  __attribute__ ((aligned(__alignof__(__gnu_cxx::stdio_filebuf<char>))));
   fake_filebuf buf_cout;
   fake_filebuf buf_cin;
   fake_filebuf buf_cerr;
@@ -192,8 +193,8 @@ namespace std
   fake_wostream wcerr;
   fake_wostream wclog;
 
-  typedef char fake_wfilebuf[sizeof(wfilebuf)]
-  __attribute__ ((aligned(__alignof__(wfilebuf))));
+  typedef char fake_wfilebuf[sizeof(__gnu_cxx::stdio_filebuf<wchar_t>)]
+  __attribute__ ((aligned(__alignof__(__gnu_cxx::stdio_filebuf<wchar_t>))));
   fake_wfilebuf buf_wcout;
   fake_wfilebuf buf_wcin;
   fake_wfilebuf buf_wcerr;
diff --git a/libstdc++-v3/src/ios.cc b/libstdc++-v3/src/ios.cc
index 8e834fd..c1167f8 100644
--- a/libstdc++-v3/src/ios.cc
+++ b/libstdc++-v3/src/ios.cc
@@ -36,8 +36,8 @@
 #include <ostream>
 #include <istream>
 #include <fstream>
-
 #include <bits/atomicity.h>
+#include <ext/stdio_filebuf.h>
 
 namespace std 
 {
@@ -46,18 +46,21 @@ namespace std
   extern ostream cout;
   extern ostream cerr;
   extern ostream clog;
-  extern filebuf buf_cout;
-  extern filebuf buf_cin;
-  extern filebuf buf_cerr;
+
+  using __gnu_cxx::stdio_filebuf;
+  extern stdio_filebuf<char> buf_cout;
+  extern stdio_filebuf<char> buf_cin;
+  extern stdio_filebuf<char> buf_cerr;
 
 #ifdef _GLIBCPP_USE_WCHAR_T
   extern wistream wcin;
   extern wostream wcout;
   extern wostream wcerr;
   extern wostream wclog;
-  extern wfilebuf buf_wcout;
-  extern wfilebuf buf_wcin;
-  extern wfilebuf buf_wcerr;
+
+  extern stdio_filebuf<wchar_t> buf_wcout;
+  extern stdio_filebuf<wchar_t> buf_wcin;
+  extern stdio_filebuf<wchar_t> buf_wcerr;
 #endif
 
   // Definitions for static const data members of __ios_flags.
@@ -147,15 +150,15 @@ namespace std
   void
   ios_base::Init::_S_ios_create(bool __sync)
   {
-    int __out_bufsize = __sync ? 0 : static_cast<int>(BUFSIZ);
-    int __in_bufsize = __sync ? 1 : static_cast<int>(BUFSIZ);
+    int __out_size = __sync ? 0 : static_cast<int>(BUFSIZ);
+    int __in_size = __sync ? 1 : static_cast<int>(BUFSIZ);
 
     // NB: The file globals.cc creates the four standard files
     // with NULL buffers. At this point, we swap out the dummy NULL
     // [io]stream objects and buffers with the real deal.
-    new (&buf_cout) filebuf(stdout, ios_base::out, __out_bufsize);
-    new (&buf_cin) filebuf(stdin, ios_base::in, __in_bufsize);
-    new (&buf_cerr) filebuf(stderr, ios_base::out, __out_bufsize);
+    new (&buf_cout) stdio_filebuf<char>(stdout, ios_base::out, __out_size);
+    new (&buf_cin) stdio_filebuf<char>(stdin, ios_base::in, __in_size);
+    new (&buf_cerr) stdio_filebuf<char>(stderr, ios_base::out, __out_size);
     new (&cout) ostream(&buf_cout);
     new (&cin) istream(&buf_cin);
     new (&cerr) ostream(&buf_cerr);
@@ -164,9 +167,9 @@ namespace std
     cerr.flags(ios_base::unitbuf);
     
 #ifdef _GLIBCPP_USE_WCHAR_T
-    new (&buf_wcout) wfilebuf(stdout, ios_base::out, __out_bufsize);
-    new (&buf_wcin) wfilebuf(stdin, ios_base::in, __in_bufsize);
-    new (&buf_wcerr) wfilebuf(stderr, ios_base::out, __out_bufsize);
+    new (&buf_wcout) stdio_filebuf<wchar_t>(stdout, ios_base::out, __out_size);
+    new (&buf_wcin) stdio_filebuf<wchar_t>(stdin, ios_base::in, __in_size);
+    new (&buf_wcerr) stdio_filebuf<wchar_t>(stderr, ios_base::out, __out_size);
     new (&wcout) wostream(&buf_wcout);
     new (&wcin) wistream(&buf_wcin);
     new (&wcerr) wostream(&buf_wcerr);
@@ -182,13 +185,14 @@ namespace std
     // Explicitly call dtors to free any memory that is dynamically
     // allocated by filebuf ctor or member functions, but don't
     // deallocate all memory by calling operator delete.
-    buf_cout.~filebuf();
-    buf_cin.~filebuf();
-    buf_cerr.~filebuf();
+    buf_cout.~stdio_filebuf();
+    buf_cin.~stdio_filebuf();
+    buf_cerr.~stdio_filebuf();
+
 #ifdef _GLIBCPP_USE_WCHAR_T
-    buf_wcout.~wfilebuf();
-    buf_wcin.~wfilebuf();
-    buf_wcerr.~wfilebuf();
+    buf_wcout.~stdio_filebuf();
+    buf_wcin.~stdio_filebuf();
+    buf_wcerr.~stdio_filebuf();
 #endif
   }
 
diff --git a/libstdc++-v3/src/misc-inst.cc b/libstdc++-v3/src/misc-inst.cc
index a276a73..07a4b1a 100644
--- a/libstdc++-v3/src/misc-inst.cc
+++ b/libstdc++-v3/src/misc-inst.cc
@@ -44,6 +44,7 @@
 #include <istream>
 #include <ostream>
 #include <iomanip>
+#include <ext/stdio_filebuf.h>
 
 // NB: Unnecessary if the .h headers already include these.
 #ifndef  _GLIBCPP_FULLY_COMPLIANT_HEADERS
@@ -264,4 +265,10 @@ namespace std
     __copy_streambufs(basic_ios<wchar_t>&, basic_streambuf<wchar_t>*,
 		      basic_streambuf<wchar_t>*); 
 #endif
+  
+  using __gnu_cxx::stdio_filebuf;
+  template class stdio_filebuf<char>;
+#ifdef _GLIBCPP_USE_WCHAR_T
+  template class stdio_filebuf<wchar_t>;
+#endif
 } //std
diff --git a/libstdc++-v3/testsuite/27_io/filebuf_members.cc b/libstdc++-v3/testsuite/27_io/filebuf_members.cc
index f8153c4..9f48229 100644
--- a/libstdc++-v3/testsuite/27_io/filebuf_members.cc
+++ b/libstdc++-v3/testsuite/27_io/filebuf_members.cc
@@ -30,6 +30,7 @@
 #include <fcntl.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <ext/stdio_filebuf.h>
 #include <testsuite_hooks.h>
 
 const char name_01[] = "filebuf_members-1.tst";
@@ -89,7 +90,7 @@ void test_02()
   FILE* f2 = fopen(name_01, "r");
   VERIFY( f2 != NULL );
   {
-    std::filebuf fb(f2, std::ios_base::in, 512);
+    __gnu_cxx::stdio_filebuf<char> fb(f2, std::ios_base::in, 512);
   }
   close_num = fclose(f2);
   VERIFY( close_num == 0 );
@@ -115,7 +116,7 @@ void test_03()
   VERIFY( first_fd != -1 );
   FILE* first_file = ::fdopen(first_fd, "r");
   VERIFY( first_file != NULL );
-  std::filebuf fb (first_file, std::ios_base::in);
+  __gnu_cxx::stdio_filebuf<char> fb(first_file, std::ios_base::in);
 
   int second_fd = fb.fd();