Index: gcc/config.gcc
===================================================================
--- gcc/config.gcc	(revision 184683)
+++ gcc/config.gcc	(working copy)
@@ -2198,6 +2198,12 @@ powerpc-*-linux* | powerpc64-*-linux*)
 	if test x${enable_secureplt} = xyes; then
 		tm_file="rs6000/secureplt.h ${tm_file}"
 	fi
+	# Pull in spec changes for GRTEv2 configurations.
+	case ${target} in
+	*-grtev2-*)
+	    tm_file="${tm_file} rs6000/linux-grtev2.h"
+	    ;;
+	esac
 	;;
 powerpc64-*-gnu*)
 	tm_file="${tm_file} elfos.h freebsd-spec.h gnu.h rs6000/sysv4.h rs6000/default64.h rs6000/linux64.h rs6000/gnu.h glibc-stdint.h"
Index: gcc/config/rs6000/linux64.h
===================================================================
--- gcc/config/rs6000/linux64.h	(revision 184683)
+++ gcc/config/rs6000/linux64.h	(working copy)
@@ -372,8 +372,8 @@ extern int dot_symbols;
 #undef	LINK_OS_DEFAULT_SPEC
 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
 
-#define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1"
-#define GLIBC_DYNAMIC_LINKER64 "/lib64/ld64.so.1"
+#define GLIBC_DYNAMIC_LINKER32 RUNTIME_ROOT_PREFIX "/lib/ld.so.1"
+#define GLIBC_DYNAMIC_LINKER64 RUNTIME_ROOT_PREFIX "/lib64/ld64.so.1"
 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
 #if DEFAULT_LIBC == LIBC_UCLIBC
Index: gcc/config/rs6000/linux-grtev2.h
===================================================================
--- gcc/config/rs6000/linux-grtev2.h	(revision 0)
+++ gcc/config/rs6000/linux-grtev2.h	(revision 0)
@@ -0,0 +1,43 @@
+/* Definitions for Linux-based GRTE (Google RunTime Environment) version 2.
+   Copyright (C) 2009,2010,2011,2012 Free Software Foundation, Inc.
+   Contributed by Chris Demetriou and Ollie Wild.
+
+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.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+/* Overrides LIB_LINUX_SPEC from sysv4.h.  */
+#undef	LIB_LINUX_SPEC
+#define LIB_LINUX_SPEC \
+  "%{pthread:-lpthread} \
+   %{shared:-lc} \
+   %{!shared:%{mieee-fp:-lieee} %{profile:%(libc_p)}%{!profile:%(libc)}}"
+
+/* When GRTE links statically, it needs its NSS and resolver libraries
+   linked in as well.  Note that when linking statically, these are
+   enclosed in a group by LINK_GCC_C_SEQUENCE_SPEC.  */
+#undef LINUX_GRTE_EXTRA_SPECS
+#define LINUX_GRTE_EXTRA_SPECS \
+  { "libc", "%{static:%(libc_static);:-lc}" }, \
+  { "libc_p", "%{static:%(libc_p_static);:-lc_p}" }, \
+  { "libc_static", \
+    "-lc -lnss_borg -lnss_cache -lnss_dns -lnss_files -lresolv" }, \
+  { "libc_p_static", \
+    "-lc_p -lnss_borg_p -lnss_cache_p -lnss_dns_p -lnss_files_p -lresolv_p" },
Index: gcc/config/rs6000/sysv4.h
===================================================================
--- gcc/config/rs6000/sysv4.h	(revision 184683)
+++ gcc/config/rs6000/sysv4.h	(working copy)
@@ -818,7 +818,10 @@ extern int fixuplabelno;
 
 #define LINK_START_LINUX_SPEC ""
 
-#define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+#ifndef RUNTIME_ROOT_PREFIX
+#define RUNTIME_ROOT_PREFIX ""
+#endif
+#define GLIBC_DYNAMIC_LINKER RUNTIME_ROOT_PREFIX "/lib/ld.so.1"
 #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
 #if DEFAULT_LIBC == LIBC_UCLIBC
 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}"
@@ -921,6 +924,11 @@ ncrtn.o%s"
 #define CPP_OS_OPENBSD_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}"
 #endif
 
+/* These may be provided by rs6000/linux-grtev2.h.  */
+#ifndef LINUX_GRTE_EXTRA_SPECS
+#define LINUX_GRTE_EXTRA_SPECS
+#endif
+
 /* Define any extra SPECS that the compiler needs to generate.  */
 /* Override rs6000.h definition.  */
 #undef	SUBTARGET_EXTRA_SPECS
@@ -995,6 +1003,7 @@ ncrtn.o%s"
   { "cpp_os_openbsd",		CPP_OS_OPENBSD_SPEC },			\
   { "cpp_os_default",		CPP_OS_DEFAULT_SPEC },			\
   { "fbsd_dynamic_linker",	FBSD_DYNAMIC_LINKER },			\
+  LINUX_GRTE_EXTRA_SPECS						\
   SUBSUBTARGET_EXTRA_SPECS
 
 #define	SUBSUBTARGET_EXTRA_SPECS
