Update some C++ header files

TODO

@@ -23,7 +23,7 @@ nuttx/:
   (4)  USB (drivers/usbdev, drivers/usbhost)
   (0)  Other drivers (drivers/)
  (12)  Libraries (libc/, libm/)
- (11)  File system/Generic drivers (fs/, drivers/)
+ (10)  File system/Generic drivers (fs/, drivers/)
   (9)  Graphics Subsystem (graphics/)
   (2)  Build system / Toolchains
   (3)  Linux/Cywgin simulation (arch/sim)
@@ -1463,7 +1463,7 @@ o File system / Generic drivers (fs/, drivers/)
                file descriptors could lie in the same range.
 
                Another example of how the current implementation limits
-               functionality:  I recently started an implement of the FILEMAX
+               functionality:  I recently started to implement of the FILEMAX
                (using pctl() instead sysctl()).  My objective was to be able
                to control the number of available file descriptors on a task-
                by-task basis.  The complexity due to the partitioning of
@@ -1495,15 +1495,6 @@ o File system / Generic drivers (fs/, drivers/)
   Status:      Open
   Priority:    Low
 
-  Title:       FAT LONG FILENAME COMPATIBILITY
-  Description: Recently there have been reports that file with long file
-               names created by NuttX don't have long file names when viewed
-               on Windows.  The long file name support has been around for a
-               long time and I don't ever having seen this before so I am
-               suspecting that some evil has crept in.
-  Status:      Open
-  Priority:    Medium
-
   Title:       MISSING FILES IN NSH 'LS' OF A DIRECTORY
   Description: I have seen cases where (1) long file names are enabled,
                but (2) a short file name is created like:

include/cxx/cstdio

 //***************************************************************************
 // include/cxx/cstdio
 //
-//   Copyright (C) 2009, 2014 Gregory Nutt. All rights reserved.
+//   Copyright (C) 2009, 2014, 2017 Gregory Nutt. All rights reserved.
 //   Author: Gregory Nutt <gnutt@nuttx.org>
 //
 // Redistribution and use in source and binary forms, with or without
@@ -69,6 +69,7 @@ namespace std
   using ::fputc;
   using ::fputs;
   using ::fread;
+  using ::freopen;
   using ::fseek;
   using ::fsetpos;
   using ::ftell;
@@ -105,6 +106,7 @@ namespace std
 
   using ::tmpnam;
   using ::tempnam;
+  using ::remove;
 }
 
 #endif // __INCLUDE_CXX_CSTDIO

include/cxx/cstdlib

 //***************************************************************************
 // include/cxx/cstdlib
 //
-//   Copyright (C) 2009, 2012, 2015-2016 Gregory Nutt. All rights reserved.
+//   Copyright (C) 2009, 2012, 2015-2017 Gregory Nutt. All rights reserved.
 //   Author: Gregory Nutt <gnutt@nuttx.org>
 //
 // Redistribution and use in source and binary forms, with or without
@@ -90,12 +90,25 @@ namespace std
   using ::strtoll;
   using ::strtoull;
 #endif
+  using ::strtof;
+#ifdef CONFIG_HAVE_DOUBLE
   using ::strtod;
+#endif
+#ifdef CONFIG_HAVE_LONG_DOUBLE
+  using ::strtold;
+#endif
 
   // Binary to string conversions
 
   using ::itoa;
 
+  // Wide character operations
+
+#ifdef CONFIG_LIBC_WCHAR
+  using ::mbtowc;
+  using ::wctomb;
+#endif
+
   // Memory Management
 
   using ::malloc;

include/cxx/cstring

 //***************************************************************************
 // include/cxx/cstring
 //
-//   Copyright (C) 2009-2012 Gregory Nutt. All rights reserved.
+//   Copyright (C) 2009-2012, 2017 Gregory Nutt. All rights reserved.
 //   Author: Gregory Nutt <gnutt@nuttx.org>
 //
 // Redistribution and use in source and binary forms, with or without
@@ -62,6 +62,8 @@ namespace std
   using ::strncmp;
   using ::strcasecmp;
   using ::strncasecmp;
+  using ::strcoll;
+  using ::stpcpy;
   using ::strcpy;
   using ::strncpy;
   using ::strpbrk;
@@ -73,6 +75,7 @@ namespace std
   using ::strcasestr;
   using ::strtok;
   using ::strtok_r;
+  using ::strxfrm;
 
   using ::memchr;
   using ::memccpy;

include/cxx/cunistd

 //***************************************************************************
 // include/cxx/cunistd
 //
-//   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+//   Copyright (C) 2012, 2017 Gregory Nutt. All rights reserved.
 //   Author: Gregory Nutt <gnutt@nuttx.org>
 //
 // Redistribution and use in source and binary forms, with or without
@@ -48,10 +48,17 @@
 
 namespace std
 {
+  // Task control interfaces
+
+  using ::vfork;
   using ::getpid;
   using ::_exit;
   using ::sleep;
   using ::usleep;
+  using ::pause;
+
+  // File descriptor opertions
+`
   using ::close;
   using ::dup;
   using ::dup2;
@@ -61,15 +68,60 @@ namespace std
   using ::write;
   using ::pread;
   using ::pwrite;
+
+  // Terminal I/O
+
+  using ::isatty;
+
+  // Memory management
+
+#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_MM_PGALLOC) && \
+    defined(CONFIG_ARCH_USE_MMU)
+  using sbrk;
+#endif
+
+  // Special devices
+
   using ::pipe;
+
+  // Operations on working directories
+
   using ::chdir;
   using ::getcwd;
+
+  // Operations on file paths
+
+  using ::access;
   using ::unlink;
   using ::rmdir;
+#ifdef CONFIG_PSEUDOFS_SOFTLINKS
+  using ::link;
+  using ::readlink;
+#endif
+
+  // Execution of program files
+
+#ifdef CONFIG_LIBC_EXECFUNCS
+  using ::execl;
+  using ::execv;
+#endif
+
+  // Other
+
   using ::getopt;
+
+  // Non-standard accessor functions
+
   using ::getoptargp;
   using ::getoptindp;
   using ::getoptoptp;
+
+  // Networking
+
+#ifdef CONFIG_NET
+  using ::gethostname;
+  using ::sethostname;
+#endif
 }
 
 #endif // __INCLUDE_CXX_CUNISTD