diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0024-PR-target-32219.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0024-PR-target-32219.patch
deleted file mode 100644
index 45acf7f..0000000
--- a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0024-PR-target-32219.patch
+++ /dev/null
@@ -1,62 +0,0 @@
-From e0d15f4f8bf28c351b9215ca37f1caa24df0e1fd Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Fri, 29 Mar 2013 09:18:54 +0400
-Subject: [PATCH 24/35] PR target/32219
-
-* varasm.c (default_binds_local_p_1): Weak data is not local.
-
-Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
-
-Upstream-Status: Backport
----
- gcc/testsuite/gcc.dg/visibility-21.c |   14 ++++++++++++++
- gcc/varasm.c                         |    9 ++++-----
- 2 files changed, 18 insertions(+), 5 deletions(-)
- create mode 100644 gcc/testsuite/gcc.dg/visibility-21.c
-
-Index: gcc-4.9-20140316/gcc/varasm.c
-===================================================================
---- gcc-4.9-20140316.orig/gcc/varasm.c
-+++ gcc-4.9-20140316/gcc/varasm.c
-@@ -6771,6 +6771,10 @@ default_binds_local_p_1 (const_tree exp,
-   /* Static variables are always local.  */
-   else if (! TREE_PUBLIC (exp))
-     local_p = true;
-+  /* hidden weak can't be overridden by something non-local, all
-+     that is possible is that it is not defined at all. */
-+  else if (DECL_WEAK (exp))
-+    local_p = false;
-   /* A variable is local if the user has said explicitly that it will
-      be.  */
-   else if ((DECL_VISIBILITY_SPECIFIED (exp)
-@@ -6784,11 +6788,6 @@ default_binds_local_p_1 (const_tree exp,
-      local.  */
-   else if (DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT)
-     local_p = true;
--  /* Default visibility weak data can be overridden by a strong symbol
--     in another module and so are not local.  */
--  else if (DECL_WEAK (exp)
--	   && !resolved_locally)
--    local_p = false;
-   /* If PIC, then assume that any global name can be overridden by
-      symbols resolved from other modules.  */
-   else if (shlib)
-Index: gcc-4.9-20140316/gcc/testsuite/gcc.dg/visibility-22.c
-===================================================================
---- /dev/null
-+++ gcc-4.9-20140316/gcc/testsuite/gcc.dg/visibility-22.c
-@@ -0,0 +1,13 @@
-+/* PR target/32219 */
-+/* { dg-do run } */
-+/* { dg-require-visibility "" } */
-+/* { dg-options "-fPIC" { target fpic } } */
-+
-+extern void f() __attribute__((weak,visibility("hidden")));
-+extern int puts( char const* );
-+int main()
-+{
-+  if (f)
-+    f();
-+  return 0;
-+}
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0066-cxxflags-for-build.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0066-cxxflags-for-build.patch
new file mode 100644
index 0000000..1105e29
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0066-cxxflags-for-build.patch
@@ -0,0 +1,123 @@
+Fix various _FOR_BUILD and related variables
+
+When doing a FOR_BUILD thing, you have to override CFLAGS with
+CFLAGS_FOR_BUILD. And if you use C++, you also have to override
+CXXFLAGS with CXXFLAGS_FOR_BUILD.
+Without this, when building for mingw, you end up trying to use
+the mingw headers for a host build.
+
+The same goes for other variables as well, such as CPPFLAGS,
+CPP, and GMPINC.
+
+Upstream-Status: Pending
+
+Signed-off-by: Peter Seebach <peter.seebach@windriver.com>
+Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
+
+diff --git a/Makefile.in b/Makefile.in
+index 9370174..011c29a 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -152,6 +152,7 @@ BUILD_EXPORTS = \
+ 	CPP="$(CC_FOR_BUILD) -E"; export CPP; \
+ 	CFLAGS="$(CFLAGS_FOR_BUILD)"; export CFLAGS; \
+ 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
++	CPPFLAGS="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS; \
+ 	CXX="$(CXX_FOR_BUILD)"; export CXX; \
+ 	CXXFLAGS="$(CXXFLAGS_FOR_BUILD)"; export CXXFLAGS; \
+ 	GCJ="$(GCJ_FOR_BUILD)"; export GCJ; \
+@@ -170,6 +171,9 @@ BUILD_EXPORTS = \
+ # built for the build system to override those in BASE_FLAGS_TO_PASS.
+ EXTRA_BUILD_FLAGS = \
+ 	CFLAGS="$(CFLAGS_FOR_BUILD)" \
++	CXXFLAGS="$(CXXFLAGS_FOR_BUILD)" \
++	CPP="$(CC_FOR_BUILD) -E" \
++	CPPFLAGS="$(CPPFLAGS_FOR_BUILD)" \
+ 	LDFLAGS="$(LDFLAGS_FOR_BUILD)"
+ 
+ # This is the list of directories to built for the host system.
+@@ -187,6 +191,7 @@ HOST_SUBDIR = @host_subdir@
+ HOST_EXPORTS = \
+ 	$(BASE_EXPORTS) \
+ 	CC="$(CC)"; export CC; \
++	CPP="$(CC) -E"; export CPP; \
+ 	ADA_CFLAGS="$(ADA_CFLAGS)"; export ADA_CFLAGS; \
+ 	CFLAGS="$(CFLAGS)"; export CFLAGS; \
+ 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
+@@ -711,6 +715,7 @@ BASE_FLAGS_TO_PASS = \
+ 	"CC_FOR_BUILD=$(CC_FOR_BUILD)" \
+ 	"CFLAGS_FOR_BUILD=$(CFLAGS_FOR_BUILD)" \
+ 	"CXX_FOR_BUILD=$(CXX_FOR_BUILD)" \
++	"CXXFLAGS_FOR_BUILD=$(CXXFLAGS_FOR_BUILD)" \
+ 	"EXPECT=$(EXPECT)" \
+ 	"FLEX=$(FLEX)" \
+ 	"INSTALL=$(INSTALL)" \
+diff --git a/Makefile.tpl b/Makefile.tpl
+index 1ea1954..78a59c3 100644
+--- a/Makefile.tpl
++++ b/Makefile.tpl
+@@ -154,6 +154,7 @@ BUILD_EXPORTS = \
+ 	CC="$(CC_FOR_BUILD)"; export CC; \
+ 	CFLAGS="$(CFLAGS_FOR_BUILD)"; export CFLAGS; \
+ 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
++	CPPFLAGS="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS; \
+ 	CXX="$(CXX_FOR_BUILD)"; export CXX; \
+ 	CXXFLAGS="$(CXXFLAGS_FOR_BUILD)"; export CXXFLAGS; \
+ 	GCJ="$(GCJ_FOR_BUILD)"; export GCJ; \
+@@ -172,6 +173,9 @@ BUILD_EXPORTS = \
+ # built for the build system to override those in BASE_FLAGS_TO_PASS.
+ EXTRA_BUILD_FLAGS = \
+ 	CFLAGS="$(CFLAGS_FOR_BUILD)" \
++	CXXFLAGS="$(CXXFLAGS_FOR_BUILD)" \
++	CPP="$(CC_FOR_BUILD) -E" \
++	CPPFLAGS="$(CPPFLAGS_FOR_BUILD)" \
+ 	LDFLAGS="$(LDFLAGS_FOR_BUILD)"
+ 
+ # This is the list of directories to built for the host system.
+@@ -189,6 +193,7 @@ HOST_SUBDIR = @host_subdir@
+ HOST_EXPORTS = \
+ 	$(BASE_EXPORTS) \
+ 	CC="$(CC)"; export CC; \
++	CPP="$(CC) -E"; export CPP; \
+ 	ADA_CFLAGS="$(ADA_CFLAGS)"; export ADA_CFLAGS; \
+ 	CFLAGS="$(CFLAGS)"; export CFLAGS; \
+ 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
+diff --git a/gcc/Makefile.in b/gcc/Makefile.in
+index cd5bc4a..98ae4f4 100644
+--- a/gcc/Makefile.in
++++ b/gcc/Makefile.in
+@@ -762,7 +762,7 @@ BUILD_LINKERFLAGS = $(BUILD_CXXFLAGS)
+ # Native linker and preprocessor flags.  For x-fragment overrides.
+ BUILD_LDFLAGS=@BUILD_LDFLAGS@
+ BUILD_CPPFLAGS= -I. -I$(@D) -I$(srcdir) -I$(srcdir)/$(@D) \
+-		-I$(srcdir)/../include @INCINTL@ $(CPPINC) $(CPPFLAGS)
++		-I$(srcdir)/../include @INCINTL@ $(CPPINC) $(CPPFLAGS_FOR_BUILD)
+ 
+ # Actual name to use when installing a native compiler.
+ GCC_INSTALL_NAME := $(shell echo gcc|sed '$(program_transform_name)')
+diff --git a/gcc/configure b/gcc/configure
+index c7ac14b..5ac63e4 100755
+--- a/gcc/configure
++++ b/gcc/configure
+@@ -11521,7 +11521,7 @@ else
+ 	CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
+ 	CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
+ 	LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
+-	GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
++	GMPINC="" CPPFLAGS="${CPPFLAGS_FOR_BUILD} -DGENERATOR_FILE" \
+ 	${realsrcdir}/configure \
+ 		--enable-languages=${enable_languages-all} \
+ 		--target=$target_alias --host=$build_alias --build=$build_alias
+diff --git a/gcc/configure.ac b/gcc/configure.ac
+index 50856e6..17a4dfd 100644
+--- a/gcc/configure.ac
++++ b/gcc/configure.ac
+@@ -1633,7 +1633,7 @@ else
+ 	CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
+ 	CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
+ 	LD="${LD_FOR_BUILD}" LDFLAGS="${LDFLAGS_FOR_BUILD}" \
+-	GMPINC="" CPPFLAGS="${CPPFLAGS} -DGENERATOR_FILE" \
++	GMPINC="" CPPFLAGS="${CPPFLAGS_FOR_BUILD} -DGENERATOR_FILE" \
+ 	${realsrcdir}/configure \
+ 		--enable-languages=${enable_languages-all} \
+ 		--target=$target_alias --host=$build_alias --build=$build_alias
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0067-fix-arm-thumb.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0067-fix-arm-thumb.patch
new file mode 100644
index 0000000..2f262e3
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0067-fix-arm-thumb.patch
@@ -0,0 +1,39 @@
+Upstream-Status: Accepted
+
+Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
+---
+
+2015-11-25  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/67954
+	* lra-constraints.c (curr_insn_transform): Add check on scratch
+	pseudo when change class to NO_REGS.  Add an assert.
+
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230894 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+
+diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
+index 4670e81..c62bf6a 100644
+--- a/gcc/lra-constraints.c
++++ b/gcc/lra-constraints.c
+@@ -3725,7 +3725,8 @@ curr_insn_transform (bool check_only_p)
+ 		 assigment pass and the scratch pseudo will be
+ 		 spilled.  Spilled scratch pseudos are transformed
+ 		 back to scratches at the LRA end.  */
+-	      && lra_former_scratch_operand_p (curr_insn, i))
++	      && lra_former_scratch_operand_p (curr_insn, i)
++	      && lra_former_scratch_p (REGNO (op)))
+ 	    {
+ 	      int regno = REGNO (op);
+ 	      lra_change_class (regno, NO_REGS, "      Change to", true);
+@@ -3734,6 +3735,8 @@ curr_insn_transform (bool check_only_p)
+ 		   spilled pseudo as there is only one such insn, the
+ 		   current one.  */
+ 		reg_renumber[regno] = -1;
++	      lra_assert (bitmap_single_bit_set_p
++			  (&lra_reg_info[REGNO (op)].insn_bitmap));
+ 	    }
+ 	  /* We can do an optional reload.  If the pseudo got a hard
+ 	     reg, we might improve the code through inheritance.  If
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0067-gcc-musl-support.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0067-gcc-musl-support.patch
new file mode 100644
index 0000000..9a0b5ad
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0067-gcc-musl-support.patch
@@ -0,0 +1,267 @@
+# HG changeset patch
+# Parent e5b4564f249f8634194bdabef4b3057d0e54ee97
+Adding -mmusl as a musl libc specifier, and the necessary hacks for it to know how to find musl's dynamic linker.
+Upstream-Status: backport [partial]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+
+Index: gcc-4.9.0/gcc/config.gcc
+===================================================================
+--- gcc-4.9.0.orig/gcc/config.gcc	2014-04-22 22:44:17.153567150 -0700
++++ gcc-4.9.0/gcc/config.gcc	2014-04-23 23:54:31.427357051 -0700
+@@ -594,7 +594,7 @@
+ esac
+ 
+ # Common C libraries.
+-tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3"
++tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4"
+ 
+ # 32-bit x86 processors supported by --with-arch=.  Each processor
+ # MUST be separated by exactly one space.
+@@ -719,6 +719,9 @@
+     *-*-*uclibc*)
+       tm_defines="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC"
+       ;;
++    *-*-*musl*)
++      tm_defines="$tm_defines DEFAULT_LIBC=LIBC_MUSL"
++      ;;
+     *)
+       tm_defines="$tm_defines DEFAULT_LIBC=LIBC_GLIBC"
+       ;;
+@@ -2328,6 +2331,11 @@
+ 	    powerpc*-*-linux*paired*)
+ 		tm_file="${tm_file} rs6000/750cl.h" ;;
+ 	esac
++        case ${target} in
++	    *-linux*-musl*)
++		enable_secureplt=yes ;;
++	esac
++
+ 	if test x${enable_secureplt} = xyes; then
+ 		tm_file="rs6000/secureplt.h ${tm_file}"
+ 	fi
+Index: gcc-4.9.0/gcc/config/linux.h
+===================================================================
+--- gcc-4.9.0.orig/gcc/config/linux.h	2014-01-02 14:23:26.000000000 -0800
++++ gcc-4.9.0/gcc/config/linux.h	2014-04-24 00:11:29.034028895 -0700
+@@ -32,10 +32,12 @@
+ #define OPTION_GLIBC  (DEFAULT_LIBC == LIBC_GLIBC)
+ #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
+ #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
++#define OPTION_MUSL   (DEFAULT_LIBC == LIBC_MUSL)
+ #else
+ #define OPTION_GLIBC  (linux_libc == LIBC_GLIBC)
+ #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC)
+ #define OPTION_BIONIC (linux_libc == LIBC_BIONIC)
++#define OPTION_MUSL   (linux_libc == LIBC_MUSL)
+ #endif
+ 
+ #define GNU_USER_TARGET_OS_CPP_BUILTINS()			\
+@@ -53,18 +55,21 @@
+    uClibc or Bionic is the default C library and whether
+    -muclibc or -mglibc or -mbionic has been passed to change the default.  */
+ 
+-#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LD1, LD2, LD3)	\
+-  "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:" LD1 "}}"
++#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LIBC4, LD1, LD2, LD3, LD4)	\
++  "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:%{" LIBC4 ":" LD4 ";:" LD1 "}}}"
+ 
+ #if DEFAULT_LIBC == LIBC_GLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
+-  CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", G, U, B)
++#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
++  CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", "mmusl", G, U, B, M)
+ #elif DEFAULT_LIBC == LIBC_UCLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
+-  CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", U, G, B)
++#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
++  CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", "mmusl", U, G, B, M)
+ #elif DEFAULT_LIBC == LIBC_BIONIC
+-#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
+-  CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", B, G, U)
++#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
++  CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", "mmusl", B, G, U, M)
++#elif DEFAULT_LIBC == LIBC_MUSL
++#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
++  CHOOSE_DYNAMIC_LINKER1 ("mmusl", "mglibc", "muclibc", "mbionic", M, G, U, B)
+ #else
+ #error "Unsupported DEFAULT_LIBC"
+ #endif /* DEFAULT_LIBC */
+@@ -84,16 +89,16 @@
+ 
+ #define GNU_USER_DYNAMIC_LINKER						\
+   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER,	\
+-			 BIONIC_DYNAMIC_LINKER)
++			 BIONIC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER)
+ #define GNU_USER_DYNAMIC_LINKER32					\
+   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \
+-			 BIONIC_DYNAMIC_LINKER32)
++			 BIONIC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32)
+ #define GNU_USER_DYNAMIC_LINKER64					\
+   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \
+-			 BIONIC_DYNAMIC_LINKER64)
++			 BIONIC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64)
+ #define GNU_USER_DYNAMIC_LINKERX32					\
+   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERX32, UCLIBC_DYNAMIC_LINKERX32, \
+-			 BIONIC_DYNAMIC_LINKERX32)
++			 BIONIC_DYNAMIC_LINKERX32, MUSL_DYNAMIC_LINKERX32)
+ 
+ /* Whether we have Bionic libc runtime */
+ #undef TARGET_HAS_BIONIC
+@@ -127,3 +132,74 @@
+ # define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function
+ 
+ #endif
++
++/* musl avoids problematic includes by rearranging the include directories.
++ * Unfortunately, this is mostly duplicated from cppdefault.c */
++#if DEFAULT_LIBC == LIBC_MUSL
++#define INCLUDE_DEFAULTS_MUSL_GPP			\
++    { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1,		\
++      GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },		\
++    { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1,		\
++      GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 },		\
++    { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1,	\
++      GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
++
++#ifdef LOCAL_INCLUDE_DIR
++#define INCLUDE_DEFAULTS_MUSL_LOCAL			\
++    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },		\
++    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
++#else
++#define INCLUDE_DEFAULTS_MUSL_LOCAL
++#endif
++
++#ifdef PREFIX_INCLUDE_DIR
++#define INCLUDE_DEFAULTS_MUSL_PREFIX			\
++    { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0},
++#else
++#define INCLUDE_DEFAULTS_MUSL_PREFIX
++#endif
++
++#ifdef CROSS_INCLUDE_DIR
++#define INCLUDE_DEFAULTS_MUSL_CROSS			\
++    { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0},
++#else
++#define INCLUDE_DEFAULTS_MUSL_CROSS
++#endif
++
++#ifdef TOOL_INCLUDE_DIR
++#define INCLUDE_DEFAULTS_MUSL_TOOL			\
++    { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0},
++#else
++#define INCLUDE_DEFAULTS_MUSL_TOOL
++#endif
++
++#ifdef NATIVE_SYSTEM_HEADER_DIR
++#define INCLUDE_DEFAULTS_MUSL_NATIVE			\
++    { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 },	\
++    { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 0 },
++#else
++#define INCLUDE_DEFAULTS_MUSL_NATIVE
++#endif
++
++#if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT)
++# undef INCLUDE_DEFAULTS_MUSL_LOCAL
++# define INCLUDE_DEFAULTS_MUSL_LOCAL
++# undef INCLUDE_DEFAULTS_MUSL_NATIVE
++# define INCLUDE_DEFAULTS_MUSL_NATIVE
++#else
++# undef INCLUDE_DEFAULTS_MUSL_CROSS
++# define INCLUDE_DEFAULTS_MUSL_CROSS
++#endif
++
++#undef INCLUDE_DEFAULTS
++#define INCLUDE_DEFAULTS				\
++  {							\
++    INCLUDE_DEFAULTS_MUSL_GPP				\
++    INCLUDE_DEFAULTS_MUSL_PREFIX			\
++    INCLUDE_DEFAULTS_MUSL_CROSS				\
++    INCLUDE_DEFAULTS_MUSL_TOOL				\
++    INCLUDE_DEFAULTS_MUSL_NATIVE			\
++    { GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 },		\
++    { 0, 0, 0, 0, 0, 0 }				\
++  }
++#endif
+Index: gcc-4.9.0/gcc/config/linux.opt
+===================================================================
+--- gcc-4.9.0.orig/gcc/config/linux.opt	2014-01-02 14:23:26.000000000 -0800
++++ gcc-4.9.0/gcc/config/linux.opt	2014-04-22 22:44:17.280233817 -0700
+@@ -30,3 +30,7 @@
+ muclibc
+ Target Report RejectNegative Var(linux_libc,LIBC_UCLIBC) Negative(mbionic)
+ Use uClibc C library
++
++mmusl
++Target Report RejectNegative Var(linux_libc,LIBC_MUSL) Negative(mglibc)
++Use musl C library
+Index: gcc-4.9.0/gcc/ginclude/stddef.h
+===================================================================
+--- gcc-4.9.0.orig/gcc/ginclude/stddef.h	2014-01-02 14:23:26.000000000 -0800
++++ gcc-4.9.0/gcc/ginclude/stddef.h	2014-04-22 22:44:17.280233817 -0700
+@@ -181,6 +181,7 @@
+ #ifndef _GCC_SIZE_T
+ #ifndef _SIZET_
+ #ifndef __size_t
++#ifndef __DEFINED_size_t /* musl */
+ #define __size_t__	/* BeOS */
+ #define __SIZE_T__	/* Cray Unicos/Mk */
+ #define _SIZE_T
+@@ -197,6 +198,7 @@
+ #define ___int_size_t_h
+ #define _GCC_SIZE_T
+ #define _SIZET_
++#define __DEFINED_size_t /* musl */
+ #if (defined (__FreeBSD__) && (__FreeBSD__ >= 5)) \
+   || defined(__FreeBSD_kernel__)
+ /* __size_t is a typedef on FreeBSD 5, must not trash it. */
+@@ -214,6 +216,7 @@
+ typedef long ssize_t;
+ #endif /* __BEOS__ */
+ #endif /* !(defined (__GNUG__) && defined (size_t)) */
++#endif /* __DEFINED_size_t */
+ #endif /* __size_t */
+ #endif /* _SIZET_ */
+ #endif /* _GCC_SIZE_T */
+Index: gcc-4.9.0/gcc/config/rs6000/secureplt.h
+===================================================================
+--- gcc-4.9.0.orig/gcc/config/rs6000/secureplt.h	2014-01-02 14:23:26.000000000 -0800
++++ gcc-4.9.0/gcc/config/rs6000/secureplt.h	2014-04-23 23:55:15.114024175 -0700
+@@ -18,3 +18,4 @@
+ <http://www.gnu.org/licenses/>.  */
+ 
+ #define CC1_SECURE_PLT_DEFAULT_SPEC "-msecure-plt"
++#define LINK_SECURE_PLT_DEFAULT_SPEC "--secure-plt"
+Index: gcc-4.9.0/gcc/config/rs6000/sysv4.h
+===================================================================
+--- gcc-4.9.0.orig/gcc/config/rs6000/sysv4.h	2014-04-23 23:52:13.854023015 -0700
++++ gcc-4.9.0/gcc/config/rs6000/sysv4.h	2014-04-24 00:10:55.550695334 -0700
+@@ -538,6 +538,10 @@
+ #define CC1_SECURE_PLT_DEFAULT_SPEC ""
+ #endif
+ 
++#ifndef LINK_SECURE_PLT_DEFAULT_SPEC
++#define LINK_SECURE_PLT_DEFAULT_SPEC ""
++#endif
++
+ /* Pass -G xxx to the compiler.  */
+ #define	CC1_SPEC "%{G*} %(cc1_cpu)" \
+ "%{meabi: %{!mcall-*: -mcall-sysv }} \
+@@ -585,7 +589,8 @@
+ 
+ /* Override the default target of the linker.  */
+ #define	LINK_TARGET_SPEC \
+-  ENDIAN_SELECT("", " --oformat elf32-powerpcle", "")
++  ENDIAN_SELECT("", " --oformat elf32-powerpcle", "") \
++  "%{!mbss-plt: %{!msecure-plt: %(link_secure_plt_default)}}"
+ 
+ /* Any specific OS flags.  */
+ #define LINK_OS_SPEC "\
+@@ -894,6 +899,7 @@
+   { "link_os_openbsd",		LINK_OS_OPENBSD_SPEC },			\
+   { "link_os_default",		LINK_OS_DEFAULT_SPEC },			\
+   { "cc1_secure_plt_default",	CC1_SECURE_PLT_DEFAULT_SPEC },		\
++  { "link_secure_plt_default",	LINK_SECURE_PLT_DEFAULT_SPEC },		\
+   { "cpp_os_ads",		CPP_OS_ADS_SPEC },			\
+   { "cpp_os_yellowknife",	CPP_OS_YELLOWKNIFE_SPEC },		\
+   { "cpp_os_mvme",		CPP_OS_MVME_SPEC },			\
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0068-musl-dynamic-linker.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0068-musl-dynamic-linker.patch
new file mode 100644
index 0000000..605ac66
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0068-musl-dynamic-linker.patch
@@ -0,0 +1,205 @@
+# HG changeset patch
+# Parent 6738fd6f6fcc2a72f2ba527bda3325642af26885
+Support for arm-linux-musl.
+Upstream-Status: Backport [partial]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+
+Index: gcc-4.9.2/gcc/config/arm/linux-eabi.h
+===================================================================
+--- gcc-4.9.2.orig/gcc/config/arm/linux-eabi.h
++++ gcc-4.9.2/gcc/config/arm/linux-eabi.h
+@@ -81,6 +81,23 @@
+ #undef TARGET_FIX_V4BX_SPEC
+ #define TARGET_FIX_V4BX_SPEC "%{mcpu=arm8|mcpu=arm810|mcpu=strongarm*|march=armv4: --fix-v4bx}"
+ 
++/* For ARM musl currently supports four dynamic linkers:
++   - ld-musl-arm.so.1 - for the EABI-derived soft-float ABI
++   - ld-musl-armhf.so.1 - for the EABI-derived hard-float ABI
++   - ld-musl-armeb.so.1 - for the EABI-derived soft-float ABI, EB
++   - ld-musl-armebhf.so.1 - for the EABI-derived hard-float ABI, EB
++   musl does not support the legacy OABI mode.
++   All the dynamic linkers live in /lib.
++   We default to soft-float, EL. */
++#undef  MUSL_DYNAMIC_LINKER
++#if TARGET_BIG_ENDIAN_DEFAULT
++#define MUSL_DYNAMIC_LINKER_E "%{mlittle-endian:;:eb}"
++#else
++#define MUSL_DYNAMIC_LINKER_E "%{mbig-endian:eb}"
++#endif
++#define MUSL_DYNAMIC_LINKER \
++  SYSTEMLIBS_DIR "ld-musl-arm" MUSL_DYNAMIC_LINKER_E "%{mfloat-abi=hard:hf}.so.1"
++
+ /* At this point, bpabi.h will have clobbered LINK_SPEC.  We want to
+    use the GNU/Linux version, not the generic BPABI version.  */
+ #undef  LINK_SPEC
+Index: gcc-4.9.2/libitm/config/arm/hwcap.cc
+===================================================================
+--- gcc-4.9.2.orig/libitm/config/arm/hwcap.cc
++++ gcc-4.9.2/libitm/config/arm/hwcap.cc
+@@ -40,7 +40,11 @@ int GTM_hwcap HIDDEN = 0
+ 
+ #ifdef __linux__
+ #include <unistd.h>
++#ifdef __GLIBC__
+ #include <sys/fcntl.h>
++#else
++#include <fcntl.h>
++#endif
+ #include <elf.h>
+ 
+ static void __attribute__((constructor))
+Index: gcc-4.9.2/gcc/config/i386/linux.h
+===================================================================
+--- gcc-4.9.2.orig/gcc/config/i386/linux.h
++++ gcc-4.9.2/gcc/config/i386/linux.h
+@@ -21,3 +21,4 @@ along with GCC; see the file COPYING3.
+ 
+ #define GNU_USER_LINK_EMULATION "elf_i386"
+ #define GLIBC_DYNAMIC_LINKER SYSTEMLIBS_DIR "ld-linux.so.2"
++#define MUSL_DYNAMIC_LINKER SYSTEMLIBS_DIR "ld-musl-i386.so.1"
+Index: gcc-4.9.2/gcc/config/i386/linux64.h
+===================================================================
+--- gcc-4.9.2.orig/gcc/config/i386/linux64.h
++++ gcc-4.9.2/gcc/config/i386/linux64.h
+@@ -30,3 +30,8 @@ see the files COPYING3 and COPYING.RUNTI
+ #define GLIBC_DYNAMIC_LINKER32 SYSTEMLIBS_DIR "ld-linux.so.2"
+ #define GLIBC_DYNAMIC_LINKER64 SYSTEMLIBS_DIR "ld-linux-x86-64.so.2"
+ #define GLIBC_DYNAMIC_LINKERX32 SYSTEMLIBS_DIR "ld-linux-x32.so.2"
++
++#define MUSL_DYNAMIC_LINKER32 SYSTEMLIBS_DIR "ld-musl-i386.so.1"
++#define MUSL_DYNAMIC_LINKER64 SYSTEMLIBS_DIR "ld-musl-x86_64.so.1"
++#define MUSL_DYNAMIC_LINKERX32 SYSTEMLIBS_DIR "ld-musl-x32.so.1"
++
+Index: gcc-4.9.2/gcc/config/mips/linux.h
+===================================================================
+--- gcc-4.9.2.orig/gcc/config/mips/linux.h
++++ gcc-4.9.2/gcc/config/mips/linux.h
+@@ -23,3 +23,6 @@ along with GCC; see the file COPYING3.
+ #undef UCLIBC_DYNAMIC_LINKER
+ #define UCLIBC_DYNAMIC_LINKER \
+   "%{mnan=2008:" SYSTEMLIBS_DIR "ld-uClibc-mipsn8.so.0;:" SYSTEMLIBS_DIR "ld-uClibc.so.0}"
++
++#define MUSL_DYNAMIC_LINKER SYSTEMLIBS_DIR "ld-musl-mips.so.1"
++
+Index: gcc-4.9.2/gcc/config/mips/linux64.h
+===================================================================
+--- gcc-4.9.2.orig/gcc/config/mips/linux64.h
++++ gcc-4.9.2/gcc/config/mips/linux64.h
+@@ -39,6 +39,11 @@ along with GCC; see the file COPYING3.
+   "%{mnan=2008:" SYSTEMLIBS_DIR "ld-uClibc-mipsn8.so.0;:" SYSTEMLIBS_DIR "ld-uClibc.so.0}"
+ 
+ #define BIONIC_DYNAMIC_LINKERN32 "/system/bin/linker32"
++
++#define MUSL_DYNAMIC_LINKERN32 SYSTEMLIBS_DIR "ld-musl-mips.so.1"
++#define MUSL_DYNAMIC_LINKER32 SYSTEMLIBS_DIR "ld-musl-mips.so.1"
++#define MUSL_DYNAMIC_LINKER64 SYSTEMLIBS_DIR "ld-musl-mips.so.1"
++
+ #define GNU_USER_DYNAMIC_LINKERN32 \
+   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERN32, UCLIBC_DYNAMIC_LINKERN32, \
+-			 BIONIC_DYNAMIC_LINKERN32)
++			 BIONIC_DYNAMIC_LINKERN32, MUSL_DYNAMIC_LINKERN32)
+Index: gcc-4.9.2/gcc/config/rs6000/linux64.h
+===================================================================
+--- gcc-4.9.2.orig/gcc/config/rs6000/linux64.h
++++ gcc-4.9.2/gcc/config/rs6000/linux64.h
+@@ -375,17 +375,22 @@ extern int dot_symbols;
+ #endif
+ #define UCLIBC_DYNAMIC_LINKER32 SYSTEMLIBS_DIR "ld-uClibc.so.0"
+ #define UCLIBC_DYNAMIC_LINKER64 SYSTEMLIBS_DIR "ld64-uClibc.so.0"
++#define MUSL_DYNAMIC_LINKER32 SYSTEMLIBS_DIR "ld-musl-powerpc.so.1"
++#define MUSL_DYNAMIC_LINKER64 SYSTEMLIBS_DIR "ld-musl-powerpc64.so.1"
++
+ #if DEFAULT_LIBC == LIBC_UCLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}"
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{mmusl:" M ";:" U "}}"
+ #elif DEFAULT_LIBC == LIBC_GLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}"
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{muclibc:" U ";:%{mmusl:" M ";:" G "}}"
++#elif DEFAULT_LIBC == LIBC_MUSL
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{muclibc:" U ";:" M "}}"
+ #else
+ #error "Unsupported DEFAULT_LIBC"
+ #endif
+ #define GNU_USER_DYNAMIC_LINKER32 \
+-  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32)
++  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32)
+ #define GNU_USER_DYNAMIC_LINKER64 \
+-  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64)
++  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64)
+ 
+ #undef  DEFAULT_ASM_ENDIAN
+ #if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN)
+Index: gcc-4.9.2/gcc/config/rs6000/sysv4.h
+===================================================================
+--- gcc-4.9.2.orig/gcc/config/rs6000/sysv4.h
++++ gcc-4.9.2/gcc/config/rs6000/sysv4.h
+@@ -768,15 +768,19 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEF
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-powerpc.so.1"
++
+ #if DEFAULT_LIBC == LIBC_UCLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}"
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{mmusl:" M ";:" U "}}"
++#elif DEFAULT_LIBC == LIBC_MUSL
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{muclibc:" U ";:" M "}}"
+ #elif !defined (DEFAULT_LIBC) || DEFAULT_LIBC == LIBC_GLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}"
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{muclibc:" U ";:%{mmusl:" M ";:" G "}}"
+ #else
+ #error "Unsupported DEFAULT_LIBC"
+ #endif
+ #define GNU_USER_DYNAMIC_LINKER \
+-  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER)
++  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER)
+ 
+ #define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
+   %{rdynamic:-export-dynamic} \
+Index: gcc-4.9.2/libitm/config/linux/x86/tls.h
+===================================================================
+--- gcc-4.9.2.orig/libitm/config/linux/x86/tls.h
++++ gcc-4.9.2/libitm/config/linux/x86/tls.h
+@@ -25,16 +25,19 @@
+ #ifndef LIBITM_X86_TLS_H
+ #define LIBITM_X86_TLS_H 1
+ 
+-#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 10)
++#if defined(__GLIBC_PREREQ)
++#if __GLIBC_PREREQ(2, 10)
+ /* Use slots in the TCB head rather than __thread lookups.
+    GLIBC has reserved words 10 through 13 for TM.  */
+ #define HAVE_ARCH_GTM_THREAD 1
+ #define HAVE_ARCH_GTM_THREAD_DISP 1
+ #endif
++#endif
+ 
+ #include "config/generic/tls.h"
+ 
+-#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 10)
++#if defined(__GLIBC_PREREQ)
++#if __GLIBC_PREREQ(2, 10)
+ namespace GTM HIDDEN {
+ 
+ #ifdef __x86_64__
+@@ -101,5 +104,6 @@ static inline void set_abi_disp(struct a
+ 
+ } // namespace GTM
+ #endif /* >= GLIBC 2.10 */
++#endif
+ 
+ #endif // LIBITM_X86_TLS_H
+Index: gcc-4.9.2/gcc/config/aarch64/aarch64-linux.h
+===================================================================
+--- gcc-4.9.2.orig/gcc/config/aarch64/aarch64-linux.h
++++ gcc-4.9.2/gcc/config/aarch64/aarch64-linux.h
+@@ -25,6 +25,8 @@
+ 
+ #define CPP_SPEC "%{pthread:-D_REENTRANT}"
+ 
++#define MUSL_DYNAMIC_LINKER SYSTEMLIBS_DIR "ld-musl-aarch64.so.1"
++
+ #define LINUX_TARGET_LINK_SPEC  "%{h*}		\
+    %{static:-Bstatic}				\
+    %{shared:-shared}				\
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0069-musl-no-fixincludes.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0069-musl-no-fixincludes.patch
new file mode 100644
index 0000000..e2b18a4
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0069-musl-no-fixincludes.patch
@@ -0,0 +1,21 @@
+# HG changeset patch
+# Parent 600a8a422ccaf5627ad1f5a138e7398df2b9e9d8
+Get rid of ever-broken fixincludes on musl.
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+
+Index: gcc-4.9-20140316/fixincludes/mkfixinc.sh
+===================================================================
+--- gcc-4.9-20140316.orig/fixincludes/mkfixinc.sh
++++ gcc-4.9-20140316/fixincludes/mkfixinc.sh
+@@ -19,7 +19,8 @@ case $machine in
+     powerpc-*-eabi*    | \
+     powerpc-*-rtems*   | \
+     powerpcle-*-eabisim* | \
+-    powerpcle-*-eabi* )
++    powerpcle-*-eabi* | \
++    *-musl* )
+ 	#  IF there is no include fixing,
+ 	#  THEN create a no-op fixer and exit
+ 	(echo "#! /bin/sh" ; echo "exit 0" ) > ${target}
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0070-libstdc-musl.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0070-libstdc-musl.patch
new file mode 100644
index 0000000..048e481
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0070-libstdc-musl.patch
@@ -0,0 +1,32 @@
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Index: gcc-4.9-20140316/libstdc++-v3/configure.host
+===================================================================
+--- gcc-4.9-20140316.orig/libstdc++-v3/configure.host	2014-03-26 01:12:19.466008193 -0700
++++ gcc-4.9-20140316/libstdc++-v3/configure.host	2014-03-26 01:43:48.222684357 -0700
+@@ -264,14 +264,24 @@
+     os_include_dir="os/bsd/freebsd"
+     ;;
+   gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
++    # check for musl by target
++    case "${host_os}" in
++      *-musl*)
++        os_include_dir="os/generic"
++        ;;
++      *)
+     if [ "$uclibc" = "yes" ]; then
+       os_include_dir="os/uclibc"
+     elif [ "$bionic" = "yes" ]; then
+       os_include_dir="os/bionic"
++    elif [ "$musl" = "yes" ]; then
++      os_include_dir="os/generic"
+     else
+       os_include_dir="os/gnu-linux"
+     fi
+     ;;
++    esac
++    ;;
+   hpux*)
+     os_include_dir="os/hpux"
+     ;;
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0071-Ignore-fdebug-prefix-map-in-producer-string-by-Danie.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0071-Ignore-fdebug-prefix-map-in-producer-string-by-Danie.patch
new file mode 100644
index 0000000..e8f79b5
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0071-Ignore-fdebug-prefix-map-in-producer-string-by-Danie.patch
@@ -0,0 +1,31 @@
+From 32593b38082ea65f4c82159254adf1e0dc2423be Mon Sep 17 00:00:00 2001
+From: bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Tue, 16 Feb 2016 03:15:15 -0500
+Subject: [PATCH] Ignore -fdebug-prefix-map in producer string (by Daniel Kahn
+ Gillmor)
+
+* dwarf2out.c (gen_producer_string): Ignore -fdebug-prefix-map.
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231835 138bc75d-0d04-0410-961f-82ee72b054a4
+
+Upstream-Status: Backport
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ gcc/dwarf2out.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
+index 3614c10..526f114 100644
+--- a/gcc/dwarf2out.c
++++ b/gcc/dwarf2out.c
+@@ -19670,6 +19670,7 @@ gen_producer_string (void)
+       case OPT_fpreprocessed:
+       case OPT_fltrans_output_list_:
+       case OPT_fresolution_:
++      case OPT_fdebug_prefix_map_:
+ 	/* Ignore these.  */
+ 	continue;
+       default:
+-- 
+1.9.1
+
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0072-support-ffile-prefix-map.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0072-support-ffile-prefix-map.patch
new file mode 100644
index 0000000..9809a6a
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0072-support-ffile-prefix-map.patch
@@ -0,0 +1,284 @@
+From e863be798ed13312a0faf0b961275f211a8123ab Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia@windriver.com>
+Date: Thu, 17 Mar 2016 00:32:17 -0400
+Subject: [PATCH] gcc/libcpp: support -ffile-prefix-map=<old>=<new>
+
+Similar -fdebug-prefix-map, add option -ffile-prefix-map to map one
+directory name (old) to another (new) in __FILE__, __BASE_FILE__ and
+__builtin_FILE ().
+
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70268
+
+Upstream-Status: Submitted [gcc-patches@gcc.gnu.org]
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ gcc/c-family/c-opts.c     |  6 ++++
+ gcc/c-family/c.opt        |  4 +++
+ gcc/dwarf2out.c           |  1 +
+ gcc/gimplify.c            |  2 ++
+ libcpp/Makefile.in        | 10 +++---
+ libcpp/file-map.c         | 92 +++++++++++++++++++++++++++++++++++++++++++++++
+ libcpp/include/file-map.h | 30 ++++++++++++++++
+ libcpp/macro.c            |  2 ++
+ 8 files changed, 142 insertions(+), 5 deletions(-)
+ create mode 100644 libcpp/file-map.c
+ create mode 100644 libcpp/include/file-map.h
+
+diff --git a/gcc/c-family/c-opts.c b/gcc/c-family/c-opts.c
+index dd5fd23..9c004a1 100644
+--- a/gcc/c-family/c-opts.c
++++ b/gcc/c-family/c-opts.c
+@@ -36,6 +36,7 @@ along with GCC; see the file COPYING3.  If not see
+ #include "options.h"
+ #include "plugin.h"		/* For PLUGIN_INCLUDE_FILE event.  */
+ #include "mkdeps.h"
++#include "file-map.h"
+ #include "c-target.h"
+ #include "tm.h"			/* For BYTES_BIG_ENDIAN,
+ 				   DOLLARS_IN_IDENTIFIERS,
+@@ -553,6 +554,11 @@ c_common_handle_option (size_t scode, const char *arg, int value,
+       cpp_opts->narrow_charset = arg;
+       break;
+ 
++    case OPT_ffile_prefix_map_:
++      if (add_file_prefix_map (arg) < 0)
++        error ("invalid argument %qs to -ffile-prefix-map", arg);
++      break;
++
+     case OPT_fwide_exec_charset_:
+       cpp_opts->wide_charset = arg;
+       break;
+diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
+index f295805..3a99662 100644
+--- a/gcc/c-family/c.opt
++++ b/gcc/c-family/c.opt
+@@ -928,6 +928,10 @@ fexec-charset=
+ C ObjC C++ ObjC++ Joined RejectNegative
+ -fexec-charset=<cset>	Convert all strings and character constants to character set <cset>
+ 
++ffile-prefix-map=
++C ObjC C++ ObjC++ Joined RejectNegative
++-ffile-prefix-map=<old=new>	Map one directory name to another in __FILE__, __BASE_FILE__ and __builtin_FILE ()
++
+ fextended-identifiers
+ C ObjC C++ ObjC++
+ Permit universal character names (\\u and \\U) in identifiers
+diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
+index 99bf6e2..3e58cfd 100644
+--- a/gcc/dwarf2out.c
++++ b/gcc/dwarf2out.c
+@@ -19199,6 +19199,7 @@ gen_producer_string (void)
+       case OPT_fltrans_output_list_:
+       case OPT_fresolution_:
+       case OPT_fdebug_prefix_map_:
++      case OPT_ffile_prefix_map_:
+ 	/* Ignore these.  */
+ 	continue;
+       default:
+diff --git a/gcc/gimplify.c b/gcc/gimplify.c
+index 89e7334..a7a97c0 100644
+--- a/gcc/gimplify.c
++++ b/gcc/gimplify.c
+@@ -59,6 +59,7 @@ along with GCC; see the file COPYING3.  If not see
+ #include "omp-low.h"
+ #include "gimple-low.h"
+ #include "cilk.h"
++#include "file-map.h"
+ 
+ #include "langhooks-def.h"	/* FIXME: for lhd_set_decl_assembler_name */
+ #include "tree-pass.h"		/* FIXME: only for PROP_gimple_any */
+@@ -2288,6 +2289,7 @@ gimplify_call_expr (tree *expr_p, gimple_seq *pre_p, bool want_value)
+       case BUILT_IN_FILE:
+ 	{
+ 	  expanded_location loc = expand_location (EXPR_LOCATION (*expr_p));
++	  loc.file = remap_file_filename (loc.file);
+ 	  *expr_p = build_string_literal (strlen (loc.file) + 1, loc.file);
+ 	  return GS_OK;
+ 	}
+diff --git a/libcpp/Makefile.in b/libcpp/Makefile.in
+index 5561c97..5017256 100644
+--- a/libcpp/Makefile.in
++++ b/libcpp/Makefile.in
+@@ -84,12 +84,12 @@ DEPMODE = $(CXXDEPMODE)
+ 
+ 
+ libcpp_a_OBJS = charset.o directives.o directives-only.o errors.o \
+-	expr.o files.o identifiers.o init.o lex.o line-map.o macro.o \
+-	mkdeps.o pch.o symtab.o traditional.o
++	expr.o file-map.o files.o identifiers.o init.o lex.o line-map.o \
++	macro.o mkdeps.o pch.o symtab.o traditional.o
+ 
+ libcpp_a_SOURCES = charset.c directives.c directives-only.c errors.c \
+-	expr.c files.c identifiers.c init.c lex.c line-map.c macro.c \
+-	mkdeps.c pch.c symtab.c traditional.c
++	expr.c file-map.c files.c identifiers.c init.c lex.c line-map.c \
++	macro.c mkdeps.c pch.c symtab.c traditional.c
+ 
+ all: libcpp.a $(USED_CATALOGS)
+ 
+@@ -263,7 +263,7 @@ po/$(PACKAGE).pot: $(libcpp_a_SOURCES)
+ 
+ TAGS_SOURCES = $(libcpp_a_SOURCES) internal.h ucnid.h \
+     include/line-map.h include/symtab.h include/cpp-id-data.h \
+-    include/cpplib.h include/mkdeps.h system.h
++    include/cpplib.h include/mkdeps.h system.h include/file-map.h
+ 
+ TAGS: $(TAGS_SOURCES)
+ 	cd $(srcdir) && etags $(TAGS_SOURCES)
+diff --git a/libcpp/file-map.c b/libcpp/file-map.c
+new file mode 100644
+index 0000000..04e851b
+--- /dev/null
++++ b/libcpp/file-map.c
+@@ -0,0 +1,92 @@
++/* Map one directory name to another in __FILE__, __BASE_FILE__
++   and __builtin_FILE ().
++   Copyright (C) 2001-2016 Free Software Foundation, Inc.
++
++This program 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.
++
++This program 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 this program; see the file COPYING3.  If not see
++<http://www.gnu.org/licenses/>.
++
++ In other words, you are welcome to use, share and improve this program.
++ You are forbidden to forbid anyone else to use, share and improve
++ what you give them.   Help stamp out software-hoarding!  */
++
++#include "config.h"
++#include "system.h"
++#include "file-map.h"
++
++/* Structure recording the mapping from source file and directory
++   names at compile time to __FILE__ */
++typedef struct file_prefix_map
++{
++  const char *old_prefix;
++  const char *new_prefix;
++  size_t old_len;
++  size_t new_len;
++  struct file_prefix_map *next;
++} file_prefix_map;
++
++/* Linked list of such structures.  */
++static file_prefix_map *file_prefix_maps;
++
++/* Record prefix mapping of __FILE__.  ARG is the argument to
++   -ffile-prefix-map and must be of the form OLD=NEW.  */
++int
++add_file_prefix_map (const char *arg)
++{
++  file_prefix_map *map;
++  const char *p;
++
++  p = strchr (arg, '=');
++  if (!p)
++  {
++      fprintf(stderr, "invalid argument %qs to -ffile-prefix-map", arg);
++      return -1;
++  }
++  map = XNEW (file_prefix_map);
++  map->old_prefix = xstrndup (arg, p - arg);
++  map->old_len = p - arg;
++  p++;
++  map->new_prefix = xstrdup (p);
++  map->new_len = strlen (p);
++  map->next = file_prefix_maps;
++  file_prefix_maps = map;
++
++  return 0;
++}
++
++/* Perform user-specified mapping of __FILE__ prefixes.  Return
++   the new name corresponding to filename.  */
++
++const char *
++remap_file_filename (const char *filename)
++{
++  file_prefix_map *map;
++  char *s;
++  const char *name;
++  size_t name_len;
++
++  for (map = file_prefix_maps; map; map = map->next)
++    if (filename_ncmp (filename, map->old_prefix, map->old_len) == 0)
++      break;
++  if (!map)
++    return filename;
++  name = filename + map->old_len;
++  name_len = strlen (name) + 1;
++  s = (char *) alloca (name_len + map->new_len);
++  memcpy (s, map->new_prefix, map->new_len);
++  memcpy (s + map->new_len, name, name_len);
++
++  return xstrdup (s);
++}
++
++
+diff --git a/libcpp/include/file-map.h b/libcpp/include/file-map.h
+new file mode 100644
+index 0000000..e6f8cbf
+--- /dev/null
++++ b/libcpp/include/file-map.h
+@@ -0,0 +1,30 @@
++/* Map one directory name to another in __FILE__, __BASE_FILE__
++   and __builtin_FILE ().
++   Copyright (C) 2001-2016 Free Software Foundation, Inc.
++
++This program 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.
++
++This program 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 this program; see the file COPYING3.  If not see
++<http://www.gnu.org/licenses/>.
++
++ In other words, you are welcome to use, share and improve this program.
++ You are forbidden to forbid anyone else to use, share and improve
++ what you give them.   Help stamp out software-hoarding!  */
++
++#ifndef LIBCPP_FILE_MAP_H
++#define LIBCPP_FILE_MAP_H
++
++const char * remap_file_filename (const char *filename);
++
++int add_file_prefix_map (const char *arg);
++
++#endif /* !LIBCPP_FILE_MAP_H  */
+diff --git a/libcpp/macro.c b/libcpp/macro.c
+index 11e50f4..5c6f90e 100644
+--- a/libcpp/macro.c
++++ b/libcpp/macro.c
+@@ -26,6 +26,7 @@ along with this program; see the file COPYING3.  If not see
+ #include "system.h"
+ #include "cpplib.h"
+ #include "internal.h"
++#include "file-map.h"
+ 
+ typedef struct macro_arg macro_arg;
+ /* This structure represents the tokens of a macro argument.  These
+@@ -288,6 +289,7 @@ _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node)
+ 	    if (!name)
+ 	      abort ();
+ 	  }
++	name = remap_file_filename (name);
+ 	len = strlen (name);
+ 	buf = _cpp_unaligned_alloc (pfile, len * 2 + 3);
+ 	result = buf;
+-- 
+1.9.1
+
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0073-Reuse-fdebug-prefix-map-to-replace-ffile-prefix-map.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0073-Reuse-fdebug-prefix-map-to-replace-ffile-prefix-map.patch
new file mode 100644
index 0000000..94e45ed
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0073-Reuse-fdebug-prefix-map-to-replace-ffile-prefix-map.patch
@@ -0,0 +1,43 @@
+From 5e10baff84038d26dc3d59b2412ba1db92cb8274 Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia@windriver.com>
+Date: Thu, 17 Mar 2016 00:34:01 -0400
+Subject: [PATCH 2/2] Reuse -fdebug-prefix-map to replace -ffile-prefix-map
+
+The oe-core may use external toolchain to compile,
+which may not support -ffile-prefix-map.
+
+Since we use -fdebug-prefix-map to do the same thing,
+so we could reuse it to replace -ffile-prefix-map.
+
+Upstream-Status: Inappropriate[oe-core specific]
+
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ gcc/opts-global.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/gcc/opts-global.c b/gcc/opts-global.c
+index 111884b..037f6c8 100644
+--- a/gcc/opts-global.c
++++ b/gcc/opts-global.c
+@@ -42,6 +42,7 @@ along with GCC; see the file COPYING3.  If not see
+ #include "toplev.h"
+ #include "tree-pass.h"
+ #include "context.h"
++#include "file-map.h"
+ 
+ typedef const char *const_char_p; /* For DEF_VEC_P.  */
+ 
+@@ -354,6 +355,9 @@ handle_common_deferred_options (void)
+ 
+ 	case OPT_fdebug_prefix_map_:
+ 	  add_debug_prefix_map (opt->arg);
++
++	  /* Reuse -fdebug-prefix-map to replace -ffile-prefix-map */
++	  add_file_prefix_map (opt->arg);
+ 	  break;
+ 
+ 	case OPT_fdump_:
+-- 
+1.9.1
+
diff --git a/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0074-fdebug-prefix-map-support-to-remap-relative-path.patch b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0074-fdebug-prefix-map-support-to-remap-relative-path.patch
new file mode 100644
index 0000000..0b91fdb
--- /dev/null
+++ b/yocto-poky/meta/recipes-devtools/gcc/gcc-4.9/0074-fdebug-prefix-map-support-to-remap-relative-path.patch
@@ -0,0 +1,51 @@
+From 289ad2969a5966c603bf6928ce442db74c4cbb25 Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia@windriver.com>
+Date: Thu, 24 Mar 2016 11:23:14 -0400
+Subject: [PATCH] gcc/final.c: -fdebug-prefix-map support to remap sources with
+ relative path
+
+PR other/70428
+* final.c (remap_debug_filename): Use lrealpath to translate
+relative path before remapping
+
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70428
+Upstream-Status: Submitted [gcc-patches@gcc.gnu.org]
+
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+diff --git a/gcc/final.c b/gcc/final.c
+index 55cf509..c3594c2 100644
+--- a/gcc/final.c
++++ b/gcc/final.c
+@@ -1554,16 +1554,25 @@ remap_debug_filename (const char *filename)
+   const char *name;
+   size_t name_len;
+ 
++  /* Support to remap filename with relative path  */
++  char *realpath = lrealpath (filename);
++  if (realpath == NULL)
++    return filename;
++
+   for (map = debug_prefix_maps; map; map = map->next)
+-    if (filename_ncmp (filename, map->old_prefix, map->old_len) == 0)
++    if (filename_ncmp (realpath, map->old_prefix, map->old_len) == 0)
+       break;
+   if (!map)
+-    return filename;
+-  name = filename + map->old_len;
++    {
++      free (realpath);
++      return filename;
++    }
++  name = realpath + map->old_len;
+   name_len = strlen (name) + 1;
+   s = (char *) alloca (name_len + map->new_len);
+   memcpy (s, map->new_prefix, map->new_len);
+   memcpy (s + map->new_len, name, name_len);
++  free (realpath);
+   return ggc_strdup (s);
+ }
+ 
+-- 
+2.7.4
+