2011-11-04	Sebastian Huber <sebastian.huber@embedded-brains.de>

	* gcc/config.gcc (arm*-*-rtemseabi*): New target.
	* gcc/config/arm/rtems-eabi.h: New.
	* gcc/config/arm/t-rtems-eabi: New.
	* libgcc/config.host (arm*-*-rtemseabi*): New target.
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 2c18655..a1e7a6d 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -904,7 +904,7 @@ arm*-*-ecos-elf)
 	tm_file="dbxelf.h elfos.h newlib-stdint.h arm/unknown-elf.h arm/elf.h arm/aout.h arm/arm.h arm/ecos-elf.h"
 	tmake_file="arm/t-arm arm/t-arm-elf"
 	;;
-arm*-*-eabi* | arm*-*-symbianelf* )
+arm*-*-eabi* | arm*-*-symbianelf* | arm*-*-rtemseabi*)
 	# The BPABI long long divmod functions return a 128-bit value in
 	# registers r0-r3.  Correctly modeling that requires the use of
 	# TImode.
@@ -919,6 +919,10 @@ arm*-*-eabi* | arm*-*-symbianelf* )
 	  tmake_file="${tmake_file} arm/t-bpabi"
 	  use_gcc_stdint=wrap
 	  ;;
+	arm*-*-rtemseabi*)
+	  tm_file="${tm_file} rtems.h arm/rtems-eabi.h newlib-stdint.h"
+	  tmake_file="${tmake_file} arm/t-bpabi t-rtems arm/t-rtems-eabi"
+	  ;;
 	arm*-*-symbianelf*)
 	  tm_file="${tm_file} arm/symbian.h"
 	  libgcc_tm_file="$libgcc_tm_file arm/symbian-lib.h"
diff --git a/gcc/config/arm/rtems-eabi.h b/gcc/config/arm/rtems-eabi.h
new file mode 100644
index 0000000..ced98a9
--- /dev/null
+++ b/gcc/config/arm/rtems-eabi.h
@@ -0,0 +1,29 @@
+/* Definitions for RTEMS based ARM systems using EABI.
+   Copyright (C) 2011 Free Software Foundation, Inc.
+ 
+   This file is part of GCC.
+ 
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3, or (at your
+   option) any later version.
+ 
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+ 
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+#define HAS_INIT_SECTION
+
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS()		\
+    do {					\
+	builtin_define ("__rtems__");		\
+	builtin_define ("__USE_INIT_FINI__");	\
+	builtin_assert ("system=rtems");	\
+	TARGET_BPABI_CPP_BUILTINS();    	\
+    } while (0)
diff --git a/gcc/config/arm/t-rtems-eabi b/gcc/config/arm/t-rtems-eabi
new file mode 100644
index 0000000..f0e714a
--- /dev/null
+++ b/gcc/config/arm/t-rtems-eabi
@@ -0,0 +1,8 @@
+# Custom RTEMS EABI multilibs
+
+MULTILIB_OPTIONS    = mthumb march=armv6-m/march=armv7/march=armv7-m
+MULTILIB_DIRNAMES   = thumb armv6-m armv7 armv7-m
+MULTILIB_EXCEPTIONS = march=armv6-m march=armv7 march=armv7-m
+MULTILIB_MATCHES    =
+MULTILIB_EXCLUSIONS =
+MULTILIB_OSDIRNAMES =
diff --git a/libgcc/config.host b/libgcc/config.host
index 08c00a3..57b044a 100644
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -300,10 +300,10 @@ arm*-*-uclinux*)		# ARM ucLinux
 arm*-*-ecos-elf)
 	tmake_file="$tmake_file t-softfp-sfdf t-softfp-excl arm/t-softfp t-softfp"
 	;;
-arm*-*-eabi* | arm*-*-symbianelf* )
+arm*-*-eabi* | arm*-*-symbianelf* | arm*-*-rtemseabi*)
 	tmake_file="${tmake_file} t-fixedpoint-gnu-prefix"
 	case ${host} in
-	arm*-*-eabi*)
+	arm*-*-eabi* | arm*-*-rtemseabi*)
 	  tmake_file="${tmake_file} arm/t-bpabi"
 	  ;;
 	arm*-*-symbianelf*)