Index: configure.host
===================================================================
--- configure.host	(revision 172224)
+++ configure.host	(working copy)
@@ -347,8 +347,13 @@
 	slow_pthread_self=
 	can_unwind_signal=yes
 	;;
+  *-*-rtems*)
+	can_unwind_signal=no
+	CHECKREFSPEC=-fcheck-references
+	DIVIDESPEC=-fuse-divide-subroutine
+	;;
 esac
 
 case "${host}" in
   *-cygwin* | *-mingw*)
 	fallback_backtrace_h=sysdep/i386/backtrace.h  
Index: configure.ac
===================================================================
--- configure.ac	(revision 172224)
+++ configure.ac	(working copy)
@@ -1048,6 +1048,19 @@
     ;;
  win32)
     ;;
+ rtems)
+    THREADS=posix
+    AC_DEFINE(HAVE_SYS_SOCKET_H, 1, [Required define in rtems.])
+    AC_DEFINE(HAVE_NETINET_IN_H, 1, [Required define in rtems.])
+    AC_DEFINE(HAVE_ARPA_INET_H, 1, [Required define in rtems.])
+    AC_DEFINE(HAVE_NETDB_H, 1, [Required define in rtems.])
+    AC_DEFINE(HAVE_SYS_IOCTL_H, 1, [Required define in rtems.])
+    AC_DEFINE(HAVE_NET_IF_H, 1, [Required define in rtems.])
+    AC_DEFINE(HAVE_IFADDRS_H, 1, [Required define in rtems.])
+    AC_DEFINE(HAVE_GETTIMEOFDAY, 1, [Required define in rtems.])
+    AC_DEFINE(HAVE_GETHOSTNAME_DECL, 1, [Required define in rtems.])
+    AC_DEFINE(RTEMS_PTHREADS, 1, [Required define in rtems.])
+    ;;
  decosf1 | irix | mach | os2 | dce | vxworks)
     AC_MSG_ERROR(thread package $THREADS not yet supported)
     ;;
Index: classpath/native/fdlibm/mprec.c
===================================================================
--- classpath/native/fdlibm/mprec.c	(revision 172224)
+++ classpath/native/fdlibm/mprec.c	(working copy)
@@ -1004,7 +1004,7 @@
 {1e-16, 1e-32};
 #endif
 
-
+#ifdef RTEMS_PTHREADS
 double
 _DEFUN (_mprec_log10, (dig),
 	int dig)
@@ -1019,3 +1019,4 @@
     }
   return v;
 }
+#endif
Index: include/config.h.in
===================================================================
--- include/config.h.in	(revision 172224)
+++ include/config.h.in	(working copy)
@@ -379,6 +379,9 @@
 /* Define if using POSIX threads on Linux. */
 #undef LINUX_THREADS
 
+/* Define if using POSIX threads on RTEMS. */
+#undef RTEMS_PTHREADS
+
 /* Define to the name of the environment variable that determines the dynamic
    library search path. */
 #undef LTDL_SHLIBPATH_VAR
Index: posix-threads.cc
===================================================================
--- posix-threads.cc	(revision 172224)
+++ posix-threads.cc	(working copy)
@@ -62,9 +62,11 @@
 static int non_daemon_count;
 
 // The signal to use when interrupting a thread.
-#if defined(LINUX_THREADS) || defined(FREEBSD_THREADS)
+#if defined(LINUX_THREADS) || defined(FREEBSD_THREADS) \
+    || defined(RTEMS_PTHREADS)
   // LinuxThreads (prior to glibc 2.1) usurps both SIGUSR1 and SIGUSR2.
   // GC on FreeBSD uses both SIGUSR1 and SIGUSR2.
+  // GC on  RTEMS  uses both SIGUSR1 and SIGUSR2.
 #  define INTR SIGHUP
 #else /* LINUX_THREADS */
 #  define INTR SIGUSR2
@@ -672,6 +674,10 @@
   pthread_attr_setschedparam (&attr, &param);
   pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
   
+#ifdef RTEMS_PTHREADS
+  pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
+  pthread_attr_setschedpolicy(&attr, SCHED_OTHER);
+#endif
   // Set stack size if -Xss option was given.
   if (gcj::stack_size > 0)
     {
Index: configure
===================================================================
--- configure	(revision 172224)
+++ configure	(working copy)
@@ -20704,6 +20704,21 @@
     ;;
  win32)
     ;;
+ rtems)
+    THREADS=posix
+$as_echo "#define HAVE_SYS_SOCKET_H 1" >>confdefs.h
+$as_echo "#define HAVE_NETINET_IN_H 1" >>confdefs.h
+$as_echo "#define HAVE_ARPA_INET_H 1" >>confdefs.h
+$as_echo "#define HAVE_NETDB_H 1" >>confdefs.h
+$as_echo "#define HAVE_SYS_IOCTL_H 1" >>confdefs.h
+$as_echo "#define HAVE_NET_IF_H 1" >>confdefs.h
+$as_echo "#define HAVE_IFADDRS_H 1" >>confdefs.h
+$as_echo "#define HAVE_GETTIMEOFDAY 1" >>confdefs.h
+$as_echo "#define HAVE_GETHOSTNAME_DECL 1" >>confdefs.h
+$as_echo "#define HAVE_MPREC_LOG10 1" >>confdefs.h
+$as_echo "#define NO_TLS 1" >>confdefs.h
+$as_echo "#define RTEMS_PTHREADS 1" >>confdefs.h
+    ;;
  decosf1 | irix | mach | os2 | dce | vxworks)
     as_fn_error "thread package $THREADS not yet supported" "$LINENO" 5
     ;;
Index: java/lang/natClass.cc
===================================================================
--- java/lang/natClass.cc	(revision 172224)
+++ java/lang/natClass.cc	(working copy)
@@ -1679,6 +1679,10 @@
   return NULL;
 }
 
+#ifdef RTEMS_PTHREADS
+# undef HAVE_TLS
+#endif
+
 #ifdef HAVE_TLS
 
 // NOTE: MCACHE_SIZE should be a power of 2 minus one.