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diff --git a/contrib/libstdc++/include/c_std/std_cstring.h b/contrib/libstdc++/include/c_std/std_cstring.h
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+// -*- C++ -*- forwarding header.
+
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 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.
+
+//
+// ISO C++ 14882: 20.4.6 C library
+//
+
+/** @file cstring
+ * This is a Standard C++ Library file. You should @c #include this file
+ * in your programs, rather than any of the "*.h" implementation files.
+ *
+ * This is the C++ version of the Standard C Library header @c string.h,
+ * and its contents are (mostly) the same as that header, but are all
+ * contained in the namespace @c std.
+ */
+
+#ifndef _CPP_CSTRING
+#define _CPP_CSTRING 1
+
+#pragma GCC system_header
+
+#include <cstddef>
+
+#include <string.h>
+
+// Get rid of those macros defined in <string.h> in lieu of real functions.
+#undef memcpy
+#undef memmove
+#undef strcpy
+#undef strncpy
+#undef strcat
+#undef strncat
+#undef memcmp
+#undef strcmp
+#undef strcoll
+#undef strncmp
+#undef strxfrm
+#undef memchr
+#undef strchr
+#undef strcspn
+#undef strpbrk
+#undef strrchr
+#undef strspn
+#undef strstr
+#undef strtok
+#undef memset
+#undef strerror
+#undef strlen
+
+namespace std
+{
+ using ::memcpy;
+ using ::memmove;
+ using ::strcpy;
+ using ::strncpy;
+ using ::strcat;
+ using ::strncat;
+ using ::memcmp;
+ using ::strcmp;
+ using ::strcoll;
+ using ::strncmp;
+ using ::strxfrm;
+ using ::strcspn;
+ using ::strspn;
+ using ::strtok;
+ using ::memset;
+ using ::strerror;
+ using ::strlen;
+
+ using ::memchr;
+
+ inline void*
+ memchr(void* __p, int __c, size_t __n)
+ { return memchr(const_cast<const void*>(__p), __c, __n); }
+
+ using ::strchr;
+
+ inline char*
+ strchr(char* __s1, int __n)
+ { return __builtin_strchr(const_cast<const char*>(__s1), __n); }
+
+ using ::strpbrk;
+
+ inline char*
+ strpbrk(char* __s1, const char* __s2)
+ { return __builtin_strpbrk(const_cast<const char*>(__s1), __s2); }
+
+ using ::strrchr;
+
+ inline char*
+ strrchr(char* __s1, int __n)
+ { return __builtin_strrchr(const_cast<const char*>(__s1), __n); }
+
+ using ::strstr;
+
+ inline char*
+ strstr(char* __s1, const char* __s2)
+ { return __builtin_strstr(const_cast<const char*>(__s1), __s2); }
+}
+
+#endif
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