Merge GDB 7.5.1

gdb/gnulib/import/mbsrtowcs-state.c

+/* Convert string to wide string.
+   Copyright (C) 2008-2012 Free Software Foundation, Inc.
+   Written by Bruno Haible <bruno@clisp.org>, 2008.
+
+   This program 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 of the License, or
+   (at your option) any later version.
+
+   This program 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 program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include <wchar.h>
+
+/* Internal state used by the functions mbsrtowcs() and mbsnrtowcs().  */
+mbstate_t _gl_mbsrtowcs_state
+/* The state must initially be in the "initial state"; so, zero-initialize it.
+   On most systems, putting it into BSS is sufficient.  Not so on Mac OS X 10.3,
+   see <http://lists.gnu.org/archive/html/bug-gnulib/2009-01/msg00329.html>.
+   When it needs an initializer, use 0 or {0} as initializer? 0 only works
+   when mbstate_t is a scalar type (such as when gnulib defines it, or on
+   AIX, IRIX, mingw). {0} works as an initializer in all cases: for a struct
+   or union type, but also for a scalar type (ISO C 99, 6.7.8.(11)).  */
+#if defined __ELF__
+  /* On ELF systems, variables in BSS behave well.  */
+#else
+  /* Use braces, to be on the safe side.  */
+  = { 0 }
+#endif
+  ;