2011-10-14 Jonathan Yong <jon_y@users.sourceforge.net>

	* configure.host: Use config/os/mingw32-w64 instead of
	config/os/mingw32 if vendor key is "w64".
	* config/os/mingw32-w64: Duplicate from config/os/mingw32.
	* config/os/mingw32-w64/os_defines.h: Enable
	_GLIBCXX_FULLY_DYNAMIC_STRING if undefined.
	* acinclude.m4: Set fully-dynamic-string to 1 when enabled,
	0 when disabled or undefined if unset by user.
	* include/bits/basic_string.h: Check if
	_GLIBCXX_FULLY_DYNAMIC_STRING is set to 0 instead of undefined.
	include/bits/basic_string.tcc: Likewise.
	* configure: Regenerated.
	* config.h.in: Likewise.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@179961 138bc75d-0d04-0410-961f-82ee72b054a4

12 files changed, 643 insertions, 18 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index f550f8fe109..9ffb299d30c 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,18 @@
+2011-10-14  Jonathan Yong  <jon_y@users.sourceforge.net>
+
+	* configure.host: Use config/os/mingw32-w64 instead of
+	config/os/mingw32 if vendor key is "w64".
+	* config/os/mingw32-w64: Duplicate from config/os/mingw32.
+	* config/os/mingw32-w64/os_defines.h: Enable
+	_GLIBCXX_FULLY_DYNAMIC_STRING if undefined.
+	* acinclude.m4: Set fully-dynamic-string to 1 when enabled,
+	0 when disabled or undefined if unset by user.
+	* include/bits/basic_string.h: Check if
+	_GLIBCXX_FULLY_DYNAMIC_STRING is set to 0 instead of undefined.
+	include/bits/basic_string.tcc: Likewise.
+	* configure: Regenerated.
+	* config.h.in: Likewise.
+
 2011-10-13  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR libstdc++/50714
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4
index 1b9d025efc3..7196acfc374 100644
--- a/libstdc++-v3/acinclude.m4
+++ b/libstdc++-v3/acinclude.m4
@@ -564,17 +564,21 @@ dnl be turned on, that does not put empty objects in per-process static
 dnl memory (mostly useful together with shared memory allocators, see PR
 dnl libstdc++/16612 for details).
 dnl
-dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING
-dnl --disable-fully-dynamic-string leaves _GLIBCXX_FULLY_DYNAMIC_STRING undefined
+dnl --enable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 1
+dnl --disable-fully-dynamic-string defines _GLIBCXX_FULLY_DYNAMIC_STRING to 0
+dnl otherwise undefined
 dnl  +  Usage:  GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING[(DEFAULT)]
 dnl       Where DEFAULT is either `yes' or `no'.
 dnl
 AC_DEFUN([GLIBCXX_ENABLE_FULLY_DYNAMIC_STRING], [
   GLIBCXX_ENABLE(fully-dynamic-string,$1,,[do not put empty strings in per-process static memory])
   if test $enable_fully_dynamic_string = yes; then
-    AC_DEFINE(_GLIBCXX_FULLY_DYNAMIC_STRING, 1,
-	      [Define if a fully dynamic basic_string is wanted.])
+    enable_fully_dynamic_string_def=1
+  else
+    enable_fully_dynamic_string_def=0
   fi
+  AC_DEFINE_UNQUOTED([_GLIBCXX_FULLY_DYNAMIC_STRING], [${enable_fully_dynamic_string_def}],
+	      [Define to 1 if a fully dynamic basic_string is wanted, 0 to disable, undefined for platform defaults])
 ])
 
 
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index 82470c8cec9..df7effb6a6b 100644
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -707,7 +707,8 @@
 /* Define to use concept checking code from the boost libraries. */
 #undef _GLIBCXX_CONCEPT_CHECKS
 
-/* Define if a fully dynamic basic_string is wanted. */
+/* Define to 1 if a fully dynamic basic_string is wanted, 0 to disable,
+   undefined for platform defaults */
 #undef _GLIBCXX_FULLY_DYNAMIC_STRING
 
 /* Define if gthreads library is available. */
diff --git a/libstdc++-v3/config/os/mingw32-w64/ctype_base.h b/libstdc++-v3/config/os/mingw32-w64/ctype_base.h
new file mode 100644
index 00000000000..5fbdff8e7f0
--- /dev/null
+++ b/libstdc++-v3/config/os/mingw32-w64/ctype_base.h
@@ -0,0 +1,64 @@
+// Locale support -*- C++ -*-
+
+// Copyright (C) 1997, 1998, 1999, 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+//
+// ISO C++ 14882: 22.1  Locales
+//
+
+//  We don't use the C-locale masks defined in mingw/include/ctype.h
+//  because those masks do not conform to the requirements of 22.2.1.
+//  In particular, a separate 'print' bitmask does not exist (isprint(c)
+//  relies on a combination of flags) and the  '_ALPHA' mask is also a
+//  combination of simple bitmasks.  Thus, we define libstdc++-specific
+//  masks here, based on the generic masks, and the corresponding
+//  classic_table in ctype_noninline.h.
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  /// @brief  Base class for ctype.
+  struct ctype_base
+  {
+    // Non-standard typedefs.
+    typedef const int* 		__to_type;
+
+    // NB: Offsets into ctype<char>::_M_table force a particular size
+    // on the mask type. Because of this, we don't use an enum.
+    typedef unsigned short 	mask;   
+    static const mask upper	= 1 << 0;
+    static const mask lower	= 1 << 1;
+    static const mask alpha	= 1 << 2;
+    static const mask digit	= 1 << 3;
+    static const mask xdigit	= 1 << 4;
+    static const mask space	= 1 << 5;
+    static const mask print	= 1 << 6;
+    static const mask graph	= (1 << 2) | (1 << 3) | (1 << 9);  // alnum|punct
+    static const mask cntrl	= 1 << 8;
+    static const mask punct 	= 1 << 9;
+    static const mask alnum	= (1 << 2) | (1 << 3);  // alpha|digit
+  };
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
diff --git a/libstdc++-v3/config/os/mingw32-w64/ctype_configure_char.cc b/libstdc++-v3/config/os/mingw32-w64/ctype_configure_char.cc
new file mode 100644
index 00000000000..12184075d77
--- /dev/null
+++ b/libstdc++-v3/config/os/mingw32-w64/ctype_configure_char.cc
@@ -0,0 +1,243 @@
+// Locale support -*- C++ -*-
+
+// Copyright (C) 2011 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file ctype_configure_char.cc */
+
+//
+// ISO C++ 14882: 22.1  Locales
+//
+
+#include <locale>
+#include <cstdlib>
+#include <cstring>
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  // The classic table used in libstdc++ is *not* the C _ctype table
+  // used by mscvrt, but is based on the ctype masks defined for libstdc++
+  // in ctype_base.h.
+
+  const ctype_base::mask*
+  ctype<char>::classic_table() throw()
+  {
+    static const ctype_base::mask _S_classic_table[256] =
+    {
+      cntrl /* null */,
+      cntrl /* ^A */,
+      cntrl /* ^B */,
+      cntrl /* ^C */,
+      cntrl /* ^D */,
+      cntrl /* ^E */,
+      cntrl /* ^F */,
+      cntrl /* ^G */,
+      cntrl /* ^H */,
+      ctype_base::mask(space | cntrl) /* tab */,
+      ctype_base::mask(space | cntrl) /* LF */,
+      ctype_base::mask(space | cntrl) /* ^K */,
+      ctype_base::mask(space | cntrl) /* FF */,
+      ctype_base::mask(space | cntrl) /* ^M */,
+      cntrl /* ^N */,
+      cntrl /* ^O */,
+      cntrl /* ^P */,
+      cntrl /* ^Q */,
+      cntrl /* ^R */,
+      cntrl /* ^S */,
+      cntrl /* ^T */,
+      cntrl /* ^U */,
+      cntrl /* ^V */,
+      cntrl /* ^W */,
+      cntrl /* ^X */,
+      cntrl /* ^Y */,
+      cntrl /* ^Z */,
+      cntrl /* esc */,
+      cntrl /* ^\ */,
+      cntrl /* ^] */,
+      cntrl /* ^^ */,
+      cntrl /* ^_ */,
+      ctype_base::mask(space | print) /*   */,
+      ctype_base::mask(punct | print) /* ! */,
+      ctype_base::mask(punct | print) /* " */,
+      ctype_base::mask(punct | print) /* # */,
+      ctype_base::mask(punct | print) /* $ */,
+      ctype_base::mask(punct | print) /* % */,
+      ctype_base::mask(punct | print) /* & */,
+      ctype_base::mask(punct | print) /* ' */,
+      ctype_base::mask(punct | print) /* ( */,
+      ctype_base::mask(punct | print) /* ) */,
+      ctype_base::mask(punct | print) /* * */,
+      ctype_base::mask(punct | print) /* + */,
+      ctype_base::mask(punct | print) /* , */,
+      ctype_base::mask(punct | print) /* - */,
+      ctype_base::mask(punct | print) /* . */,
+      ctype_base::mask(punct | print) /* / */,
+      ctype_base::mask(digit | xdigit | print) /* 0 */,
+      ctype_base::mask(digit | xdigit | print) /* 1 */,
+      ctype_base::mask(digit | xdigit | print) /* 2 */,
+      ctype_base::mask(digit | xdigit | print) /* 3 */,
+      ctype_base::mask(digit | xdigit | print) /* 4 */,
+      ctype_base::mask(digit | xdigit | print) /* 5 */,
+      ctype_base::mask(digit | xdigit | print) /* 6 */,
+      ctype_base::mask(digit | xdigit | print) /* 7 */,
+      ctype_base::mask(digit | xdigit | print) /* 8 */,
+      ctype_base::mask(digit | xdigit | print) /* 9 */,
+      ctype_base::mask(punct | print) /* : */,
+      ctype_base::mask(punct | print) /* ; */,
+      ctype_base::mask(punct | print) /* < */,
+      ctype_base::mask(punct | print) /* = */,
+      ctype_base::mask(punct | print) /* > */,
+      ctype_base::mask(punct | print) /* ? */,
+      ctype_base::mask(punct | print) /* ! */,
+      ctype_base::mask(alpha | upper | xdigit | print) /* A */,
+      ctype_base::mask(alpha | upper | xdigit | print) /* B */,
+      ctype_base::mask(alpha | upper | xdigit | print) /* C */,
+      ctype_base::mask(alpha | upper | xdigit | print) /* D */,
+      ctype_base::mask(alpha | upper | xdigit | print) /* E */,
+      ctype_base::mask(alpha | upper | xdigit | print) /* F */,
+      ctype_base::mask(alpha | upper | print) /* G */,
+      ctype_base::mask(alpha | upper | print) /* H */,
+      ctype_base::mask(alpha | upper | print) /* I */,
+      ctype_base::mask(alpha | upper | print) /* J */,
+      ctype_base::mask(alpha | upper | print) /* K */,
+      ctype_base::mask(alpha | upper | print) /* L */,
+      ctype_base::mask(alpha | upper | print) /* M */,
+      ctype_base::mask(alpha | upper | print) /* N */,
+      ctype_base::mask(alpha | upper | print) /* O */,
+      ctype_base::mask(alpha | upper | print) /* P */,
+      ctype_base::mask(alpha | upper | print) /* Q */,
+      ctype_base::mask(alpha | upper | print) /* R */,
+      ctype_base::mask(alpha | upper | print) /* S */,
+      ctype_base::mask(alpha | upper | print) /* T */,
+      ctype_base::mask(alpha | upper | print) /* U */,
+      ctype_base::mask(alpha | upper | print) /* V */,
+      ctype_base::mask(alpha | upper | print) /* W */,
+      ctype_base::mask(alpha | upper | print) /* X */,
+      ctype_base::mask(alpha | upper | print) /* Y */,
+      ctype_base::mask(alpha | upper | print) /* Z */,
+      ctype_base::mask(punct | print) /* [ */,
+      ctype_base::mask(punct | print) /* \ */,
+      ctype_base::mask(punct | print) /* ] */,
+      ctype_base::mask(punct | print) /* ^ */,
+      ctype_base::mask(punct | print) /* _ */,
+      ctype_base::mask(punct | print) /* ` */,
+      ctype_base::mask(alpha | lower | xdigit | print) /* a */,
+      ctype_base::mask(alpha | lower | xdigit | print) /* b */,
+      ctype_base::mask(alpha | lower | xdigit | print) /* c */,
+      ctype_base::mask(alpha | lower | xdigit | print) /* d */,
+      ctype_base::mask(alpha | lower | xdigit | print) /* e */,
+      ctype_base::mask(alpha | lower | xdigit | print) /* f */,
+      ctype_base::mask(alpha | lower | print) /* g */,
+      ctype_base::mask(alpha | lower | print) /* h */,
+      ctype_base::mask(alpha | lower | print) /* i */,
+      ctype_base::mask(alpha | lower | print) /* j */,
+      ctype_base::mask(alpha | lower | print) /* k */,
+      ctype_base::mask(alpha | lower | print) /* l */,
+      ctype_base::mask(alpha | lower | print) /* m */,
+      ctype_base::mask(alpha | lower | print) /* n */,
+      ctype_base::mask(alpha | lower | print) /* o */,
+      ctype_base::mask(alpha | lower | print) /* p */,
+      ctype_base::mask(alpha | lower | print) /* q */,
+      ctype_base::mask(alpha | lower | print) /* r */,
+      ctype_base::mask(alpha | lower | print) /* s */,
+      ctype_base::mask(alpha | lower | print) /* t */,
+      ctype_base::mask(alpha | lower | print) /* u */,
+      ctype_base::mask(alpha | lower | print) /* v */,
+      ctype_base::mask(alpha | lower | print) /* w */,
+      ctype_base::mask(alpha | lower | print) /* x */,
+      ctype_base::mask(alpha | lower | print) /* y */,
+      ctype_base::mask(alpha | lower | print) /* x */,
+      ctype_base::mask(punct | print) /* { */,
+      ctype_base::mask(punct | print) /* | */,
+      ctype_base::mask(punct | print) /* } */,
+      ctype_base::mask(punct | print) /* ~ */,
+      cntrl /* del (0x7f)*/,
+      /* The next 128 entries are all 0.   */
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+    };
+    return _S_classic_table;
+  }
+
+  ctype<char>::ctype(__c_locale, const mask* __table, bool __del,
+		     size_t __refs)
+  : facet(__refs), _M_del(__table != 0 && __del),
+  _M_toupper(NULL), _M_tolower(NULL),
+  _M_table(__table ? __table : classic_table())
+  {
+    memset(_M_widen, 0, sizeof(_M_widen));
+    _M_widen_ok = 0;
+    memset(_M_narrow, 0, sizeof(_M_narrow));
+    _M_narrow_ok = 0;
+  }
+
+  ctype<char>::ctype(const mask* __table, bool __del, size_t __refs)
+  : facet(__refs), _M_del(__table != 0 && __del),
+  _M_toupper(NULL), _M_tolower(NULL),
+  _M_table(__table ? __table : classic_table())
+  {
+    memset(_M_widen, 0, sizeof(_M_widen));
+    _M_widen_ok = 0;
+    memset(_M_narrow, 0, sizeof(_M_narrow));
+    _M_narrow_ok = 0;
+  }
+
+  char
+  ctype<char>::do_toupper(char __c) const
+  { return (this->is(ctype_base::lower, __c) ? (__c - 'a' + 'A') : __c); }
+
+  const char*
+  ctype<char>::do_toupper(char* __low, const char* __high) const
+  {
+    while (__low < __high)
+      {
+	*__low = this->do_toupper(*__low);
+	++__low;
+      }
+    return __high;
+  }
+
+  char
+  ctype<char>::do_tolower(char __c) const
+  { return (this->is(ctype_base::upper, __c) ? (__c - 'A' + 'a') : __c); }
+
+  const char*
+  ctype<char>::do_tolower(char* __low, const char* __high) const
+  {
+    while (__low < __high)
+      {
+	*__low = this->do_tolower(*__low);
+	++__low;
+      }
+    return __high;
+  }
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
diff --git a/libstdc++-v3/config/os/mingw32-w64/ctype_inline.h b/libstdc++-v3/config/os/mingw32-w64/ctype_inline.h
new file mode 100644
index 00000000000..f1b9f6c6617
--- /dev/null
+++ b/libstdc++-v3/config/os/mingw32-w64/ctype_inline.h
@@ -0,0 +1,75 @@
+// Locale support -*- C++ -*-
+
+// Copyright (C) 2000, 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/ctype_inline.h
+ *  This is an internal header file, included by other library headers.
+ *  Do not attempt to use it directly. @headername{locale}
+ */
+
+//
+// ISO C++ 14882: 22.1  Locales
+//
+
+// ctype bits to be inlined go here. Non-inlinable (ie virtual do_*)
+// functions go in ctype.cc
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  bool
+  ctype<char>::
+  is(mask __m, char __c) const
+  { return (_M_table[static_cast<unsigned char>(__c) ] & __m); }
+
+
+  const char*
+  ctype<char>::
+  is(const char* __low, const char* __high, mask* __vec) const
+  {
+    while (__low < __high)
+      *__vec++ = _M_table[static_cast<unsigned char>(*__low++)];
+    return __high;
+  }
+
+  const char*
+  ctype<char>::
+  scan_is(mask __m, const char* __low, const char* __high) const
+  {
+    while (__low < __high && !this->is(__m, *__low))
+      ++__low;
+    return __low;
+  }
+
+  const char*
+  ctype<char>::
+  scan_not(mask __m, const char* __low, const char* __high) const
+  {
+    while (__low < __high && this->is(__m, *__low) != 0)
+      ++__low;
+    return __low;
+  }
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
diff --git a/libstdc++-v3/config/os/mingw32-w64/error_constants.h b/libstdc++-v3/config/os/mingw32-w64/error_constants.h
new file mode 100644
index 00000000000..da2d311762c
--- /dev/null
+++ b/libstdc++-v3/config/os/mingw32-w64/error_constants.h
@@ -0,0 +1,142 @@
+// Specific definitions for mingw32 platform  -*- C++ -*-
+
+// Copyright (C) 2007, 2008, 2009, 2010, 2011 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/error_constants.h
+ *  This is an internal header file, included by other library headers.
+ *  Do not attempt to use it directly. @headername{system_error}
+ */
+
+#ifndef _GLIBCXX_ERROR_CONSTANTS
+#  define _GLIBCXX_ERROR_CONSTANTS
+
+#include <bits/c++config.h>
+#include <cerrno>
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+// Most of the commented-out error codes are socket-related and could be
+// replaced by Winsock WSA-prefixed equivalents.
+  enum class errc
+    {
+//    address_family_not_supported = 		EAFNOSUPPORT,
+//    address_in_use = 				EADDRINUSE,
+//    address_not_available = 			EADDRNOTAVAIL,
+//    already_connected = 			EISCONN,
+      argument_list_too_long = 			E2BIG,
+      argument_out_of_domain = 			EDOM,
+      bad_address = 				EFAULT,
+      bad_file_descriptor = 			EBADF,
+//    bad_message = 				EBADMSG,
+      broken_pipe = 				EPIPE,
+//    connection_aborted = 			ECONNABORTED,
+//    connection_already_in_progress = 		EALREADY,
+//    connection_refused = 			ECONNREFUSED,
+//    connection_reset = 			ECONNRESET,
+//    cross_device_link = 			EXDEV,
+//    destination_address_required = 		EDESTADDRREQ,
+      device_or_resource_busy = 		EBUSY,
+      directory_not_empty = 			ENOTEMPTY,
+      executable_format_error = 		ENOEXEC,
+      file_exists = 	       			EEXIST,
+      file_too_large = 				EFBIG,
+      filename_too_long = 			ENAMETOOLONG,
+      function_not_supported = 			ENOSYS,
+//    host_unreachable = 			EHOSTUNREACH,
+//    identifier_removed = 			EIDRM,
+      illegal_byte_sequence = 			EILSEQ,
+      inappropriate_io_control_operation = 	ENOTTY,
+      interrupted = 				EINTR,
+      invalid_argument = 			EINVAL,
+      invalid_seek = 				ESPIPE,
+      io_error = 				EIO,
+      is_a_directory = 				EISDIR,
+//    message_size = 				EMSGSIZE,
+//    network_down = 				ENETDOWN,
+//    network_reset = 				ENETRESET,
+//    network_unreachable = 			ENETUNREACH,
+//    no_buffer_space = 			ENOBUFS,
+#ifdef _GLIBCXX_HAVE_ECHILD
+      no_child_process = 			ECHILD,
+#endif
+//    no_link = 				ENOLINK,
+      no_lock_available = 			ENOLCK,
+//    no_message_available = 			ENODATA,
+//    no_message = 				ENOMSG,
+//    no_protocol_option = 			ENOPROTOOPT,
+#ifdef _GLIBCXX_HAVE_ENOSPC
+      no_space_on_device = 			ENOSPC,
+#endif
+//    no_stream_resources = 			ENOSR,
+      no_such_device_or_address = 		ENXIO,
+      no_such_device = 				ENODEV,
+      no_such_file_or_directory = 		ENOENT,
+      no_such_process = 			ESRCH,
+      not_a_directory = 			ENOTDIR,
+//    not_a_socket = 				ENOTSOCK,
+//    not_a_stream = 				ENOSTR,
+//    not_connected = 				ENOTCONN,
+      not_enough_memory = 			ENOMEM,
+#ifdef _GLIBCXX_HAVE_ENOTSUP
+      not_supported = 				ENOTSUP,
+#endif
+//    operation_canceled = 			ECANCELED,
+//    operation_in_progress = 			EINPROGRESS,
+#ifdef _GLIBCXX_HAVE_EPERM
+      operation_not_permitted = 		EPERM,
+#endif
+//    operation_not_supported = 		EOPNOTSUPP,
+#ifdef _GLIBCXX_HAVE_EWOULDBLOCK
+      operation_would_block = 			EWOULDBLOCK,
+#endif
+//    owner_dead = 				EOWNERDEAD,
+      permission_denied = 			EACCES,
+//    protocol_error = 				EPROTO,
+//    protocol_not_supported = 			EPROTONOSUPPORT,
+      read_only_file_system = 			EROFS,
+      resource_deadlock_would_occur = 		EDEADLK,
+      resource_unavailable_try_again = 		EAGAIN,
+      result_out_of_range = 			ERANGE,
+//    state_not_recoverable = 			ENOTRECOVERABLE,
+//    stream_timeout = 				ETIME,
+//    text_file_busy = 				ETXTBSY,
+#ifdef _GLIBCXX_HAVE_ETIMEDOUT
+      timed_out = 				ETIMEDOUT,
+#endif
+      too_many_files_open_in_system = 		ENFILE,
+      too_many_files_open = 			EMFILE,
+      too_many_links = 				EMLINK
+//    too_many_symbolic_link_levels = 		ELOOP,
+#ifdef _GLIBCXX_HAVE_EOVERFLOW
+	,
+      value_too_large = 			EOVERFLOW
+#endif
+//    wrong_protocol_type = 			EPROTOTYPE
+   };
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+#endif
diff --git a/libstdc++-v3/config/os/mingw32-w64/os_defines.h b/libstdc++-v3/config/os/mingw32-w64/os_defines.h
new file mode 100644
index 00000000000..c483a92e6da
--- /dev/null
+++ b/libstdc++-v3/config/os/mingw32-w64/os_defines.h
@@ -0,0 +1,68 @@
+// Specific definitions for generic platforms  -*- C++ -*-
+
+// Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+// 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/os_defines.h
+ *  This is an internal header file, included by other library headers.
+ *  Do not attempt to use it directly. @headername{iosfwd}
+ */
+
+#ifndef _GLIBCXX_OS_DEFINES
+#  define _GLIBCXX_OS_DEFINES
+
+// System-specific #define, typedefs, corrections, etc, go here.  This
+// file will come before all others.
+
+//  Define as 0, if you want, to enable inlining of gthread functions.
+//  By default, don't pollute libstdc++ with win32api names.
+#if !defined (__GTHREAD_HIDE_WIN32API)
+# define __GTHREAD_HIDE_WIN32API 1
+#endif
+
+// Don't let win32api windef.h define min and max as macros
+// if included after c++config.h.
+#undef NOMINMAX
+#define NOMINMAX 1
+
+#if defined (_GLIBCXX_DLL)
+#define _GLIBCXX_PSEUDO_VISIBILITY_default __attribute__ ((__dllimport__))
+#else
+#define _GLIBCXX_PSEUDO_VISIBILITY_default
+#endif
+#define _GLIBCXX_PSEUDO_VISIBILITY_hidden
+
+#define _GLIBCXX_PSEUDO_VISIBILITY(V) _GLIBCXX_PSEUDO_VISIBILITY_ ## V
+
+// See libstdc++/20806.
+#define _GLIBCXX_HAVE_DOS_BASED_FILESYSTEM 1
+
+// See  libstdc++/37522.
+#define _GLIBCXX_HAVE_BROKEN_VSWPRINTF 1
+
+// See libstdc++/43738
+// On native windows targets there is no ioctl function. And the existing
+// ioctlsocket function doesn't work for normal file-descriptors.
+#define _GLIBCXX_NO_IOCTL 1
+
+#endif
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index ef663beee0c..87579d9c7c7 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -17240,10 +17240,15 @@ fi
 
 
   if test $enable_fully_dynamic_string = yes; then
+    enable_fully_dynamic_string_def=1
+  else
+    enable_fully_dynamic_string_def=0
+  fi
 
-$as_echo "#define _GLIBCXX_FULLY_DYNAMIC_STRING 1" >>confdefs.h
+cat >>confdefs.h <<_ACEOF
+#define _GLIBCXX_FULLY_DYNAMIC_STRING ${enable_fully_dynamic_string_def}
+_ACEOF
 
-  fi
 
 
 
diff --git a/libstdc++-v3/configure.host b/libstdc++-v3/configure.host
index 799cec2f412..4da4508fa4f 100644
--- a/libstdc++-v3/configure.host
+++ b/libstdc++-v3/configure.host
@@ -260,8 +260,16 @@ case "${host_os}" in
     atomic_word_dir=os/irix
     ;;
   mingw32*)
-    os_include_dir="os/mingw32"
-    error_constants_dir="os/mingw32"
+    case "$host" in
+      *-w64-*)
+        os_include_dir="os/mingw32-w64"
+        error_constants_dir="os/mingw32-w64"
+        ;;
+      *)
+        os_include_dir="os/mingw32"
+        error_constants_dir="os/mingw32"
+        ;;
+    esac
     OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)"
     ;;
   netbsd*)
diff --git a/libstdc++-v3/include/bits/basic_string.h b/libstdc++-v3/include/bits/basic_string.h
index 55513ea910f..5708194bd01 100644
--- a/libstdc++-v3/include/bits/basic_string.h
+++ b/libstdc++-v3/include/bits/basic_string.h
@@ -201,7 +201,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	void
 	_M_set_length_and_sharable(size_type __n)
 	{
-#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
+#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
 	  if (__builtin_expect(this != &_S_empty_rep(), false))
 #endif
 	    {
@@ -231,7 +231,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	void
 	_M_dispose(const _Alloc& __a)
 	{
-#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
+#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
 	  if (__builtin_expect(this != &_S_empty_rep(), false))
 #endif
 	    {
@@ -252,7 +252,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	_CharT*
 	_M_refcopy() throw()
 	{
-#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
+#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
 	  if (__builtin_expect(this != &_S_empty_rep(), false))
 #endif
             __gnu_cxx::__atomic_add_dispatch(&this->_M_refcount, 1);
@@ -430,7 +430,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
        *  @brief  Default constructor creates an empty string.
        */
       basic_string()
-#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
+#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
       : _M_dataplus(_S_empty_rep()._M_refdata(), _Alloc()) { }
 #else
       : _M_dataplus(_S_construct(size_type(), _CharT(), _Alloc()), _Alloc()){ }
@@ -502,7 +502,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       basic_string(basic_string&& __str) noexcept
       : _M_dataplus(__str._M_dataplus)
       {
-#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING	
+#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
 	__str._M_data(_S_empty_rep()._M_refdata());
 #else
 	__str._M_data(_S_construct(size_type(), _CharT(), get_allocator()));
diff --git a/libstdc++-v3/include/bits/basic_string.tcc b/libstdc++-v3/include/bits/basic_string.tcc
index 056e2657390..7eff81819f6 100644
--- a/libstdc++-v3/include/bits/basic_string.tcc
+++ b/libstdc++-v3/include/bits/basic_string.tcc
@@ -80,7 +80,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
 		   input_iterator_tag)
       {
-#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
+#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
 	if (__beg == __end && __a == _Alloc())
 	  return _S_empty_rep()._M_refdata();
 #endif
@@ -126,7 +126,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       _S_construct(_InIterator __beg, _InIterator __end, const _Alloc& __a,
 		   forward_iterator_tag)
       {
-#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
+#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
 	if (__beg == __end && __a == _Alloc())
 	  return _S_empty_rep()._M_refdata();
 #endif
@@ -154,7 +154,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     basic_string<_CharT, _Traits, _Alloc>::
     _S_construct(size_type __n, _CharT __c, const _Alloc& __a)
     {
-#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
+#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
       if (__n == 0 && __a == _Alloc())
 	return _S_empty_rep()._M_refdata();
 #endif
@@ -456,7 +456,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     basic_string<_CharT, _Traits, _Alloc>::
     _M_leak_hard()
     {
-#ifndef _GLIBCXX_FULLY_DYNAMIC_STRING
+#if _GLIBCXX_FULLY_DYNAMIC_STRING == 0
       if (_M_rep() == &_S_empty_rep())
 	return;
 #endif