nanopi environment back to compiler version 9

nano-env

@@ -3,13 +3,18 @@ SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 echo "${SCRIPTDIR}"
 
 #install development environment
-${SCRIPTDIR}/install-environment.sh ${SCRIPTDIR}
+#${SCRIPTDIR}/install-environment.sh ${SCRIPTDIR}
 
 #install buildroot repository to generate the U-Boot, the Linux kernel and the rootfs
-mkdir -p ~/workspace/nano
+#mkdir -p ~/workspace/nano
 cd ~/workspace/nano
-git clone git://git.buildroot.net/buildroot
+#git clone git://git.buildroot.net/buildroot
 cd buildroot
-git checkout -b nano 2021.08
+git checkout -b nano 2021.08.1
+
+cd toolchain/toolchain-external/toolchain-external-arm-aarch64
+git checkout 2020.05.3 -- .
+cd ~/workspace/nano/buildroot
+
 patch -p1 < ${SCRIPTDIR}/config/buildroot_nano.patch
 make friendlyarm_nanopi_neo_plus2_defconfig