re PR libfortran/63471 (unix.c:1906:10: error: implicit declaration of function 'ttyname_r')

	PR libfortran/63471
        * config/pa/pa-hpux11.h (TARGET_OS_CPP_BUILTINS): Define _REENTRANT
        when _HPUX_SOURCE is defined.

From-SVN: r216152

gcc/ChangeLog

+2014-10-13  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+	PR libfortran/63471
+        * config/pa/pa-hpux11.h (TARGET_OS_CPP_BUILTINS): Define _REENTRANT
+        when _HPUX_SOURCE is defined.
+
 2014-10-13  Jan Hubicka  <hubicka@ucw.cz>
 
 	PR tree-optimization/62127

gcc/config/pa/pa-hpux11.h

@@ -40,6 +40,7 @@ along with GCC; see the file COPYING3.  If not see
 	if (c_dialect_cxx ())						\
 	  {								\
 	    builtin_define ("_HPUX_SOURCE");				\
+	    builtin_define ("_REENTRANT");				\
 	    builtin_define ("_INCLUDE_LONGLONG");			\
 	    builtin_define ("__STDCPP__");				\
 	  }								\
@@ -48,6 +49,7 @@ along with GCC; see the file COPYING3.  If not see
 	    if (!flag_iso)						\
 	      {								\
 		builtin_define ("_HPUX_SOURCE");			\
+		builtin_define ("_REENTRANT");				\
 		if (preprocessing_trad_p ())				\
 		  {							\
 		    builtin_define ("hp9000s800");			\