Merge GDB 7.5.1

gdb/README

                      README for GDB release
 
 This is GDB, the GNU source-level debugger.
 
 A summary of new features is in the file `gdb/NEWS'.
 
 Check the GDB home page at http://www.gnu.org/software/gdb/ for up to
 date release information, mailing list links and archives, etc.
 
 The file `gdb/PROBLEMS' contains information on problems identified
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 `--enable-tui'
      Build GDB with the text-mode full-screen user interface (TUI).
      Requires a curses library (ncurses and cursesX are also
      supported).
 
 `--enable-gdbtk'
      Build GDB with the gdbtk GUI interface.  Requires TCL/Tk to be
      installed.
 
-`--with-libunwind'
-     Use the libunwind library for unwinding function call stack.  See
-     http://www.nongnu.org/libunwind/index.html fro details.
-     Supported only on some platforms.
+`--with-libunwind-ia64'
+     Use the libunwind library for unwinding function call stack on ia64
+     target platforms.
+     See http://www.nongnu.org/libunwind/index.html for details.
 
 `--with-curses'
      Use the curses library instead of the termcap library, for
      text-mode terminal operations.
 
 `--enable-profiling' Enable profiling of GDB itself.  Necessary if you
      want to use the "maint set profile" command for profiling GDB.
      Requires the functions `monstartup' and `_mcleanup' to be present
      in the standard C library used to build GDB, and also requires a
      compiler that supports the `-pg' option.
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 Every year of each range, inclusive, is a copyrightable year that
 could be listed individually.
 
 
 
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