locale.h: Add a bogus definition of locale_t

drivers/README.txt

@@ -12,11 +12,11 @@ Contents:
 Files in this directory
 ^^^^^^^^^^^^^^^^^^^^^^^
 
-dev_null.c and dev_zero.c
+dev_null.c, dev_urandom, and dev_zero.c
-  These files provide the standard /dev/null and /dev/zero devices.
+  These files provide the standard /dev/null, /dev/urandom, and /dev/zero
-  See include/nuttx/fs/fs.h for functions that should be called if you
+  devices.  See include/nuttx/drivers/driers.h for prototypes of functions
-  want to register these devices (devnull_register() and
+  that should be called if you want to register these devices
-  devzero_register()).
+  (devnull_register(), devurandom_register(), and devzero_register()).
 
 pwm.c
   Provides the "upper half" of a pulse width modulation (PWM) driver.

include/cxx/clocale

@@ -48,6 +48,7 @@
 
 namespace std
 {
+  using ::locale_t;
   using ::setlocale;
   using ::localeconv;
 }

include/locale.h

@@ -59,6 +59,10 @@
  * Public Type Definitions
  ****************************************************************************/
 
+/* OpenGroup.org: "The locale.h header shall define the lconv structure,
+ *  which shall include at least the following members. ..."
+ */
+
 struct lconv
 {
   FAR char *decimal_point;
@@ -87,6 +91,12 @@ struct lconv
   FAR char int_p_sign_posn;
 };
 
+/* OpenGroup.org:  The locale.h header shall define the locale_t type,
+ * representing a locale object
+ */
+
+typedef FAR void *locale_t;
+
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/