diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index ce8c5980e..850b93acc 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,16 @@
+2013-11-29  Jennifer Averett <jennifer.averett@oarcorp.com>
+
+	* libc/include/pthread.h (pthread_attr_setaffinity_np):
+	Add pthread SMP affinity attributes to methods to RTEMS for
+	compatibility with GNU/Linux.
+	(pthread_attr_getaffinity_np): Likewise.
+	(pthread_setaffinity_np): Likewise.
+	(pthread_getaffinity_np): Likewise.
+	(pthread_getattr_np): Add for GNU/Linux compatibility.
+	* libc/include/sys/types.h: Add cpuset to pthread_attr_t for RTEMS.
+	* libc/include/sys/cdefs.h (_GNU_SOURCE): Defining _GNU_SOURCE
+	turns on all _XXX_VISBLE feature flags.
+
 2013-11-27  Sebastian Huber  <sebastian.huber@embedded-brains.de>
 
 	* libc/sys/rtems/cpusetalloc.c: New file.
diff --git a/newlib/libc/include/pthread.h b/newlib/libc/include/pthread.h
index ff7f354fd..935de4119 100644
--- a/newlib/libc/include/pthread.h
+++ b/newlib/libc/include/pthread.h
@@ -2,7 +2,7 @@
  *
  *  Written by Joel Sherrill <joel@OARcorp.com>.
  *
- *  COPYRIGHT (c) 1989-2010.
+ *  COPYRIGHT (c) 1989-2013.
  *  On-Line Applications Research Corporation (OAR).
  *
  *  Permission to use, copy, modify, and distribute this software for any
@@ -32,6 +32,7 @@ extern "C" {
 #include <sys/types.h>
 #include <time.h>
 #include <sys/sched.h>
+#include <sys/cdefs.h>
 
 /* Register Fork Handlers */
 int	_EXFUN(pthread_atfork,(void (*prepare)(void), void (*parent)(void),
@@ -206,6 +207,29 @@ int	_EXFUN(pthread_attr_getguardsize,
 int	_EXFUN(pthread_attr_setguardsize,
 	(pthread_attr_t *__attr, size_t __guardsize));
 
+/* POSIX thread APIs beyond the POSIX standard but provided 
+ * in GNU/Linux. They may be provided by other OSes for
+ * compatibility.
+ */
+#if defined(__GNU_VISIBLE)
+#if defined(__rtems__) 
+int	_EXFUN(pthread_attr_setaffinity_np,
+	(pthread_attr_t *__attr, size_t __cpusetsize, 
+	const cpu_set_t *__cpuset));
+int 	_EXFUN(pthread_attr_getaffinity_np,
+	(const pthread_attr_t *__attr, size_t __cpusetsize,
+	cpu_set_t *__cpuset));
+
+int	_EXFUN(pthread_setaffinity_np,
+	(pthread_t __id, size_t __cpusetsize, const cpu_set_t *__cpuset));
+int	_EXFUN(pthread_getaffinity_np,
+	(const pthread_t __id, size_t __cpusetsize, cpu_set_t *__cpuset));
+
+int	_EXFUN(pthread_getattr_np,
+	(pthread_t __id, pthread_attr_t *__attr));
+#endif /* defined(__rtems__) */
+#endif /* defined(__GNU_VISIBLE) */
+
 /* Thread Creation, P1003.1c/Draft 10, p. 144 */
 
 int	_EXFUN(pthread_create,
diff --git a/newlib/libc/include/sys/cdefs.h b/newlib/libc/include/sys/cdefs.h
index 38616834e..4a7339c79 100644
--- a/newlib/libc/include/sys/cdefs.h
+++ b/newlib/libc/include/sys/cdefs.h
@@ -693,7 +693,13 @@
 #define	__XSI_VISIBLE		0
 #define	__BSD_VISIBLE		0
 #define	__ISO_C_VISIBLE		2011
-#else				/* Default environment: show everything. */
+#elif defined(_GNU_SOURCE)	/* Everything and the kitchen sink. */
+#define	__POSIX_VISIBLE		200809
+#define	__XSI_VISIBLE		700
+#define	__BSD_VISIBLE		1
+#define	__ISO_C_VISIBLE		2011
+#define	__GNU_VISIBLE		1
+#else				/* Default: everything except __GNU_VISIBLE. */
 #define	__POSIX_VISIBLE		200809
 #define	__XSI_VISIBLE		700
 #define	__BSD_VISIBLE		1
diff --git a/newlib/libc/include/sys/types.h b/newlib/libc/include/sys/types.h
index 0627ca9fb..ed33e0a61 100644
--- a/newlib/libc/include/sys/types.h
+++ b/newlib/libc/include/sys/types.h
@@ -322,6 +322,10 @@ typedef __uint32_t pthread_t;            /* identify a thread */
 #define PTHREAD_CREATE_DETACHED 0
 #define PTHREAD_CREATE_JOINABLE  1
 
+#if defined(__rtems__)
+  #include <sys/cpuset.h>
+#endif
+
 #if defined(__XMK__)
 typedef struct pthread_attr_s {
   int contentionscope;
@@ -351,7 +355,11 @@ typedef struct {
   int  cputime_clock_allowed;  /* see time.h */
 #endif
   int  detachstate;
-
+#if defined(__rtems__)
+  size_t affinitysetsize;
+  cpu_set_t *affinityset;
+  cpu_set_t affinitysetpreallocated;
+#endif
 } pthread_attr_t;
 
 #endif /* !defined(__XMK__) */