IOT2000_BuildRoot/patches/0003-CrossCompile-script.patch

diff --git a/CrossCompile.sh b/CrossCompile.sh
new file mode 100755
index 0000000..f18e4d5
--- /dev/null
+++ b/CrossCompile.sh
@@ -0,0 +1,89 @@
+#! /bin/bash
+#
+#
+
+WRKDIR=`pwd`
+CMDDIR=`dirname \`readlink -f $0\``
+cd $CMDDIR
+
+#=== Asssign GNU_TARGET_NAME from .config
+_ARCH=`grep BR2_ARCH\= .config | awk -F\= -F\" '{print $2}'`
+_TARGET_VENDOR=`grep BR2_TOOLCHAIN_BUILDROOT_VENDOR\= .config | awk -F\= -F\" '{print $2}'`
+
+# -- get target os
+_BR2_BINFMT_FLAT=`grep BR2_BINFMT_FLAT\= .config | awk -F\= '{print $2}'`
+if [ "$_BR2_BINFMT_FLAT" = "y" ]; then
+	_TARGET_OS="uclinux"
+	else
+	_TARGET_OS="linux"
+fi	
+
+# -- get libc
+_BR2_TOOLCHAIN_USES_UCLIBC=`grep BR2_TOOLCHAIN_USES_UCLIBC\= .config | awk -F\= '{print $2}'`
+_BR2_TOOLCHAIN_USES_MUSL=`grep BR2_TOOLCHAIN_USES_MUSL\= .config | awk -F\= '{print $2}'`
+
+if [ "$_BR2_TOOLCHAIN_USES_UCLIBC" = "y" ]; then
+	_LIBC="uclibc"
+	else
+	if [ "$_BR2_TOOLCHAIN_USES_MUSL" = "y" ]; then
+		_LIBC="musl"
+		else
+		_LIBC="gnu"
+	fi
+fi	 		
+
+# -- ABI
+_BR2_arm=`grep BR2_arm\= .config | awk -F\= '{print $2}'`
+_BR2_armeb=`grep BR2_armeb\= .config | awk -F\= '{print $2}'`
+_BR2_ARM_EABIHF=`grep BR2_ARM_EABIHF\= .config | awk -F\= '{print $2}'`
+if [ "$_BR2_arm" = "y" ] || [ "$_BR2_armeb" = "y" ]; then
+	if [ "$_LIBC" = "uclibc" ]; then
+		_ABI="gnueabi"
+		else
+		_ABI="eabi"
+	fi
+	if [ "$_BR2_ARM_EABIHF" = "y" ]; then
+		_ABI="${_ABI}hf"
+	fi
+fi
+	
+_GNU_TARGET_NAME="${_ARCH}-${_TARGET_VENDOR}-${_TARGET_OS}-${_LIBC}${_ABI}"
+#===============================================================
+
+TOOLCHAIN=`grep BR2_HOST_DIR .config | awk -F\= -F\" '{print $2}'`
+echo $TOOLCHAIN
+
+if [[ $TOOLCHAIN = *\$\(BASE_DIR\)* ]]; then
+	export SYSROOT=`readlink -f $CMDDIR`/output/host/usr/bin/
+else
+	export SYSROOT=$TOOLCHAIN/usr/bin
+fi
+
+export PATH=$PATH:$SYSROOT
+
+export CROSS_COMPILE="${_GNU_TARGET_NAME}-"
+export CROSS=${CROSS_COMPILE}
+
+export ARCH=arm64
+_KERNELDIR=`grep BR2_LINUX_KERNEL_VERSION\= .config | awk -F\= -F\" '{print $2}'`
+export KERNELDIR=${CMDDIR}/output/build/linux-${_KERNELDIR}
+export BB_KERNEL_SOURCES=$KERNELDIR
+export SYSROOTARM=`grep BR2_HOST_DIR .config | awk -F\= -F\" '{print $2}'`/usr/${_GNU_TARGET_NAME}/sysroot
+export CC_FULLPATH="${SYSROOT}/${CROSS_COMPILE}"
+export CC=${CROSS_COMPILE}gcc
+export CXX=${CROSS_COMPILE}g++
+
+export AS=arm-buildroot-linux-gnueabihf-as
+export NM=arm-buildroot-linux-gnueabihf-nm
+export OBJCOPY=arm-buildroot-linux-gnueabihf-objcopy
+export STRIP=arm-buildroot-linux-gnueabihf-strip
+#for contiki-ng
+export LD_OVERRIDE=$CC
+
+cd $WRKDIR
+if [ $# -eq "0" ] 
+then
+PROMPT_COMMAND='PS1="\[\033[0;31m\]CROSS CC:\[\033[0;32m\]$PS1";unset PROMPT_COMMAND' bash ; reset
+else
+$1
+fi