diff --git a/poky/meta/recipes-devtools/gcc/gcc/0018-export-CPP.patch b/poky/meta/recipes-devtools/gcc/gcc/0018-export-CPP.patch
index e6596da..86ab657 100644
--- a/poky/meta/recipes-devtools/gcc/gcc/0018-export-CPP.patch
+++ b/poky/meta/recipes-devtools/gcc/gcc/0018-export-CPP.patch
@@ -1,50 +1,199 @@
-From b6e229a13aebfbb3fe38c216fd51b68bf71cfa9c Mon Sep 17 00:00:00 2001
-From: Khem Raj <raj.khem@gmail.com>
-Date: Fri, 20 Feb 2015 09:40:59 +0000
-Subject: [PATCH] export CPP
+From: Richard Purdie <richard.purdie@linuxfoundation.org>
+Subject: [PATCH 1/5] Makefile.in: Ensure build CPP/CPPFLAGS is used for build targets
 
-The OE environment sets and exports CPP as being the target gcc. When
-building gcc-cross-canadian for a mingw targetted sdk, the following can be found
-in build.x86_64-pokysdk-mingw32.i586-poky-linux/build-x86_64-linux/libiberty/config.log:
+During cross compiling, CPP is being set to the target compiler even for
+build targets. As an example, when building a cross compiler targetting
+mingw, the config.log for libiberty in
+build.x86_64-pokysdk-mingw32.i586-poky-linux/build-x86_64-linux/libiberty/config.log
+shows:
 
-configure:3641: checking for _FILE_OFFSET_BITS value needed for large files
-configure:3666: gcc  -c -isystem/media/build1/poky/build/tmp/sysroots/x86_64-linux/usr/include -O2 -pipe  conftest.c >&5
-configure:3666: $? = 0
-configure:3698: result: no
 configure:3786: checking how to run the C preprocessor
-configure:3856: result: x86_64-pokysdk-mingw32-gcc -E --sysroot=/media/build1/poky/build/tmp/sysroots/x86_64-nativesdk-mingw32-pokysdk-mingw32
-configure:3876: x86_64-pokysdk-mingw32-gcc -E --sysroot=/media/build1/poky/build/tmp/sysroots/x86_64-nativesdk-mingw32-pokysdk-mingw32 conftest.c
+configure:3856: result: x86_64-pokysdk-mingw32-gcc -E --sysroot=[sysroot]/x86_64-nativesdk-mingw32-pokysdk-mingw32
+configure:3876: x86_64-pokysdk-mingw32-gcc -E --sysroot=[sysroot]/x86_64-nativesdk-mingw32-pokysdk-mingw32 conftest.c
 configure:3876: $? = 0
 
-Note this is a *build* target (in build-x86_64-linux) so it should be
-using the host "gcc", not x86_64-pokysdk-mingw32-gcc. Since the mingw32
-headers are very different, using the wrong cpp is a real problem. It is leaking
-into configure through the CPP variable. Ultimately this leads to build
-failures related to not being able to include a process.h file for pem-unix.c.
+This is libiberty being built for the build environment, not the target one
+(i.e. in build-x86_64-linux). As such it should be using the build environment's
+gcc and not the target one. In the mingw case the system headers are quite
+different leading to build failures related to not being able to include a
+process.h file for pem-unix.c.
 
-The fix is to ensure we export a sane CPP value into the build
-environment when using build targets. We could define a CPP_FOR_BUILD value which may be
-the version which needs to be upstreamed but for now, this fix is good enough to
-avoid the problem.
+Further analysis shows the same issue occuring for CPPFLAGS too.
 
-RP 22/08/2013
+Fix this by adding support for CPP_FOR_BUILD and CPPFLAGS_FOR_BUILD which
+for example, avoids mixing the mingw headers for host binaries on linux
+systems.
 
-Upstream-Status: Pending
+2021-10-27 Richard Purdie <richard.purdie@linuxfoundation.org>
 
-Signed-off-by: Khem Raj <raj.khem@gmail.com>
+ChangeLog:
+
+    * Makefile.tpl: Add CPP_FOR_BUILD and CPPFLAGS_FOR_BUILD support
+    * Makefile.in: Regenerate.
+    * configure: Regenerate.
+    * configure.ac: Add CPP_FOR_BUILD and CPPFLAGS_FOR_BUILD support
+
+gcc/ChangeLog:
+
+    * configure: Regenerate.
+    * configure.ac: Use CPPFLAGS_FOR_BUILD for GMPINC
+
+Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
+
+Submitted [https://gcc.gnu.org/pipermail/gcc-patches/2021-October/582727.html]
+Upstream-Status: Backport [https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=84401ce5fb4ecab55decb472b168100e7593e01f]
 ---
- Makefile.in | 1 +
- 1 file changed, 1 insertion(+)
+ Makefile.in      | 6 ++++++
+ Makefile.tpl     | 6 ++++++
+ configure        | 4 ++++
+ configure.ac     | 4 ++++
+ gcc/configure    | 2 +-
+ gcc/configure.ac | 2 +-
+ 6 files changed, 22 insertions(+), 2 deletions(-)
 
-diff --git a/Makefile.in b/Makefile.in
-index 047be0255e2..af19589fa95 100644
---- a/Makefile.in
-+++ b/Makefile.in
-@@ -149,6 +149,7 @@ BUILD_EXPORTS = \
- 	AR="$(AR_FOR_BUILD)"; export AR; \
- 	AS="$(AS_FOR_BUILD)"; export AS; \
+Index: gcc-11.2.0/Makefile.in
+===================================================================
+--- gcc-11.2.0.orig/Makefile.in
++++ gcc-11.2.0/Makefile.in
+@@ -151,6 +151,8 @@ BUILD_EXPORTS = \
  	CC="$(CC_FOR_BUILD)"; export CC; \
-+	CPP="$(CC_FOR_BUILD) -E"; export CPP; \
  	CFLAGS="$(CFLAGS_FOR_BUILD)"; export CFLAGS; \
  	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
++	CPP="$(CPP_FOR_BUILD)"; export CPP; \
++	CPPFLAGS="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS; \
  	CXX="$(CXX_FOR_BUILD)"; export CXX; \
+ 	CXXFLAGS="$(CXXFLAGS_FOR_BUILD)"; export CXXFLAGS; \
+ 	GFORTRAN="$(GFORTRAN_FOR_BUILD)"; export GFORTRAN; \
+@@ -198,6 +200,8 @@ HOST_EXPORTS = \
+ 	AR="$(AR)"; export AR; \
+ 	AS="$(AS)"; export AS; \
+ 	CC_FOR_BUILD="$(CC_FOR_BUILD)"; export CC_FOR_BUILD; \
++	CPP_FOR_BUILD="$(CPP_FOR_BUILD)"; export CPP_FOR_BUILD; \
++	CPPFLAGS_FOR_BUILD="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS_FOR_BUILD; \
+ 	CXX_FOR_BUILD="$(CXX_FOR_BUILD)"; export CXX_FOR_BUILD; \
+ 	DLLTOOL="$(DLLTOOL)"; export DLLTOOL; \
+ 	LD="$(LD)"; export LD; \
+@@ -353,6 +357,8 @@ AR_FOR_BUILD = @AR_FOR_BUILD@
+ AS_FOR_BUILD = @AS_FOR_BUILD@
+ CC_FOR_BUILD = @CC_FOR_BUILD@
+ CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
++CPP_FOR_BUILD = @CPP_FOR_BUILD@
++CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@
+ CXXFLAGS_FOR_BUILD = @CXXFLAGS_FOR_BUILD@
+ CXX_FOR_BUILD = @CXX_FOR_BUILD@
+ DLLTOOL_FOR_BUILD = @DLLTOOL_FOR_BUILD@
+Index: gcc-11.2.0/Makefile.tpl
+===================================================================
+--- gcc-11.2.0.orig/Makefile.tpl
++++ gcc-11.2.0/Makefile.tpl
+@@ -154,6 +154,8 @@ BUILD_EXPORTS = \
+ 	CC="$(CC_FOR_BUILD)"; export CC; \
+ 	CFLAGS="$(CFLAGS_FOR_BUILD)"; export CFLAGS; \
+ 	CONFIG_SHELL="$(SHELL)"; export CONFIG_SHELL; \
++	CPP="$(CPP_FOR_BUILD)"; export CPP; \
++	CPPFLAGS="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS; \
+ 	CXX="$(CXX_FOR_BUILD)"; export CXX; \
+ 	CXXFLAGS="$(CXXFLAGS_FOR_BUILD)"; export CXXFLAGS; \
+ 	GFORTRAN="$(GFORTRAN_FOR_BUILD)"; export GFORTRAN; \
+@@ -201,6 +203,8 @@ HOST_EXPORTS = \
+ 	AR="$(AR)"; export AR; \
+ 	AS="$(AS)"; export AS; \
+ 	CC_FOR_BUILD="$(CC_FOR_BUILD)"; export CC_FOR_BUILD; \
++	CPP_FOR_BUILD="$(CPP_FOR_BUILD)"; export CPP_FOR_BUILD; \
++	CPPFLAGS_FOR_BUILD="$(CPPFLAGS_FOR_BUILD)"; export CPPFLAGS_FOR_BUILD; \
+ 	CXX_FOR_BUILD="$(CXX_FOR_BUILD)"; export CXX_FOR_BUILD; \
+ 	DLLTOOL="$(DLLTOOL)"; export DLLTOOL; \
+ 	LD="$(LD)"; export LD; \
+@@ -356,6 +360,8 @@ AR_FOR_BUILD = @AR_FOR_BUILD@
+ AS_FOR_BUILD = @AS_FOR_BUILD@
+ CC_FOR_BUILD = @CC_FOR_BUILD@
+ CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
++CPP_FOR_BUILD = @CPP_FOR_BUILD@
++CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@
+ CXXFLAGS_FOR_BUILD = @CXXFLAGS_FOR_BUILD@
+ CXX_FOR_BUILD = @CXX_FOR_BUILD@
+ DLLTOOL_FOR_BUILD = @DLLTOOL_FOR_BUILD@
+Index: gcc-11.2.0/configure
+===================================================================
+--- gcc-11.2.0.orig/configure
++++ gcc-11.2.0/configure
+@@ -652,6 +652,8 @@ GFORTRAN_FOR_BUILD
+ DLLTOOL_FOR_BUILD
+ CXX_FOR_BUILD
+ CXXFLAGS_FOR_BUILD
++CPPFLAGS_FOR_BUILD
++CPP_FOR_BUILD
+ CFLAGS_FOR_BUILD
+ CC_FOR_BUILD
+ AS_FOR_BUILD
+@@ -4092,6 +4094,7 @@ if test "${build}" != "${host}" ; then
+   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
+   AS_FOR_BUILD=${AS_FOR_BUILD-as}
+   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
++  CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CPP)}"
+   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
+   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
+   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
+@@ -9809,6 +9812,7 @@ esac
+ # our build compiler if desired.
+ if test x"${build}" = x"${host}" ; then
+   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
++  CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
+   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
+   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
+ fi
+Index: gcc-11.2.0/configure.ac
+===================================================================
+--- gcc-11.2.0.orig/configure.ac
++++ gcc-11.2.0/configure.ac
+@@ -1347,6 +1347,7 @@ if test "${build}" != "${host}" ; then
+   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
+   AS_FOR_BUILD=${AS_FOR_BUILD-as}
+   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
++  CPP_FOR_BUILD="${CPP_FOR_BUILD-\$(CPP)}"
+   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
+   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
+   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
+@@ -3321,6 +3322,7 @@ esac
+ # our build compiler if desired.
+ if test x"${build}" = x"${host}" ; then
+   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
++  CPPFLAGS_FOR_BUILD=${CPPFLAGS_FOR_BUILD-${CPPFLAGS}}
+   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
+   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
+ fi
+@@ -3387,6 +3389,8 @@ AC_SUBST(AR_FOR_BUILD)
+ AC_SUBST(AS_FOR_BUILD)
+ AC_SUBST(CC_FOR_BUILD)
+ AC_SUBST(CFLAGS_FOR_BUILD)
++AC_SUBST(CPP_FOR_BUILD)
++AC_SUBST(CPPFLAGS_FOR_BUILD)
+ AC_SUBST(CXXFLAGS_FOR_BUILD)
+ AC_SUBST(CXX_FOR_BUILD)
+ AC_SUBST(DLLTOOL_FOR_BUILD)
+Index: gcc-11.2.0/gcc/configure
+===================================================================
+--- gcc-11.2.0.orig/gcc/configure
++++ gcc-11.2.0/gcc/configure
+@@ -12699,7 +12699,7 @@ else
+ 	CC="${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} \
+ 		${enable_obsolete+--enable-obsolete="$enable_obsolete"} \
+Index: gcc-11.2.0/gcc/configure.ac
+===================================================================
+--- gcc-11.2.0.orig/gcc/configure.ac
++++ gcc-11.2.0/gcc/configure.ac
+@@ -2023,7 +2023,7 @@ 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} \
+ 		${enable_obsolete+--enable-obsolete="$enable_obsolete"} \