diff --git a/include/cxx/csignal b/include/cxx/csignal
index c66473bb57f..b5ccdbf8ddc 100644
--- a/include/cxx/csignal
+++ b/include/cxx/csignal
@@ -49,6 +49,7 @@
 namespace std
 {
   using ::sigset_t;
+  using ::sig_atomic_t;
   using ::sigval;
   using ::sigevent;
   using ::siginfo;
@@ -56,18 +57,24 @@ namespace std
   using ::sigaction;
   using ::kill;
   using ::raise;
-  using ::sigemptyset;
-  using ::sigfillset;
+  using ::sigaction;
   using ::sigaddset;
   using ::sigdelset;
+  using ::sigemptyset;
+  using ::sigfillset;
+  using ::sighold;
   using ::sigismember;
-  using ::sigaction;
-  using ::sigprocmask;
+  using ::sigignore;
+  using ::signal;
+  using ::sigpause;
   using ::sigpending;
+  using ::sigprocmask;
+  using ::sigqueue;
+  using ::sigrelse;
+  using ::sigset;
+  using ::sigtimedwait;
   using ::sigsuspend;
   using ::sigwaitinfo;
-  using ::sigtimedwait;
-  using ::sigqueue;
 }
 
 #endif // CSIGNAL_HEADER
diff --git a/include/cxx/cstdlib b/include/cxx/cstdlib
index 419291c789b..65c200672a5 100644
--- a/include/cxx/cstdlib
+++ b/include/cxx/cstdlib
@@ -1,7 +1,7 @@
 //***************************************************************************
 // include/cxx/cstdlib
 //
-//   Copyright (C) 2009, 2012, 2015 Gregory Nutt. All rights reserved.
+//   Copyright (C) 2009, 2012, 2015-2016 Gregory Nutt. All rights reserved.
 //   Author: Gregory Nutt <gnutt@nuttx.org>
 //
 // Redistribution and use in source and binary forms, with or without
@@ -54,9 +54,9 @@ namespace std
   using ::srand;
   using ::rand;
 
+#ifndef CONFIG_DISABLE_ENVIRON
   // Environment variable support
 
-#ifndef CONFIG_DISABLE_ENVIRON
   using ::get_environ_ptr;
   using ::getenv;
   using ::putenv;
@@ -76,6 +76,12 @@ namespace std
   using ::on_exit;
 #endif
 
+#ifndef __KERNEL__
+  // System command
+
+  using ::system;
+#endif
+
   // String to binary conversions
 
   using ::strtol;
@@ -100,6 +106,16 @@ namespace std
   using ::calloc;
   using ::mallinfo;
 
+#ifdef CONFIG_PSEUDOTERM
+  // Pseudo-Terminals
+
+#ifdef CONFIG_PSEUDOTERM_SUSV1
+  using ::ptsname;
+  using ::ptsname_r;
+#endif
+  using ::unlockpt;
+#endif
+
   // Arithmetic
 
   using ::abs;
@@ -124,6 +140,10 @@ namespace std
   // Sorting
 
   using ::qsort;
+
+  // Binary search
+
+  using ::bsearch;
 }
 
 #endif // __INCLUDE_CXX_CSTDLIB
diff --git a/include/signal.h b/include/signal.h
index 576691a168d..a4060fe3316 100644
--- a/include/signal.h
+++ b/include/signal.h
@@ -298,9 +298,9 @@ int sighold(int signo);
 int sigismember(FAR const sigset_t *set, int signo);
 int sigignore(int signo);
 CODE void (*signal(int signo, CODE void (*func)(int signo)))(int signo);
-int sigprocmask(int how, FAR const sigset_t *set, FAR sigset_t *oset);
 int sigpause(int signo);
 int sigpending(FAR sigset_t *set);
+int sigprocmask(int how, FAR const sigset_t *set, FAR sigset_t *oset);
 #ifdef CONFIG_CAN_PASS_STRUCTS
 int sigqueue(int pid, int signo, union sigval value);
 #else
diff --git a/include/stdlib.h b/include/stdlib.h
index 4b112da3684..6b4498ebea3 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -1,7 +1,7 @@
 /****************************************************************************
  * include/stdlib.h
  *
- *   Copyright (C) 2007-2015 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007-2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -143,9 +143,9 @@ extern "C"
 void      srand(unsigned int seed);
 int       rand(void);
 
+#ifndef CONFIG_DISABLE_ENVIRON
 /* Environment variable support */
 
-#ifndef CONFIG_DISABLE_ENVIRON
 FAR char **get_environ_ptr(void);
 FAR char *getenv(FAR const char *name);
 int       putenv(FAR const char *string);