Generate an arm64 rpi userland for use on ubuntu/arm64.

build_arm64_rpi_userland.sh

#!/bin/bash  -x

workdir="${HOME}/workdir"
[[ ! -d "$workdir" ]] && ( mkdir -p "$workdir" || exit 1)
[[ ! -d "$workdir"/tmp ]] && ( mkdir -p "$workdir"/tmp || exit 1)
[[ ! -d "$workdir"/output ]] && ( mkdir -p "$workdir"/output || exit 1)
echo "workdir is ${workdir}"
tmpdir=$(mktemp -d deb_XXXX -p "$workdir"/tmp)
deb_temp=${tmpdir}/deb
extract_tmp=${tmpdir}/extract
echo "tmpdir is ${tmpdir}"

rm -rf "${workdir}"/rpiuserland.compile.log
sudo apt install -y git patchelf
is_git_repo="$(
	cd "${workdir}"/rpi-userland || exit
	git rev-parse --is-inside-work-tree 2>/dev/null
)"
if [ "$is_git_repo" ]; then
	cd "$workdir"/rpi-userland && git clean -d -x -f
else
		rm -rf "${workdir}"/rpi-userland
		cd "$workdir" && git clone --depth 1 https://github.com/raspberrypi/userland rpi-userland
fi

USERLANDREV=$(git -C "${workdir}"/rpi-userland rev-parse --short HEAD) >/dev/null
mkdir -p "${workdir}"/scripts
(
	cd "${workdir}"/scripts && curl -OL https://github.com/satmandu/docker-rpi4-imagebuilder/raw/master/scripts/patch_rpi-userland.sh
	chmod +x patch_rpi-userland.sh
)
echo "* Compiling Raspberry Pi userland source."
cd "${workdir}"/rpi-userland/ || exit
[[ -e "${workdir}"/scripts/patch_rpi-userland.sh ]] && {
	cd "${workdir}"/rpi-userland/ && "${workdir}"/scripts/patch_rpi-userland.sh
	true
}
sed -i 's/__bitwise/FDT_BITWISE/' "${workdir}"/rpi-userland/opensrc/helpers/libfdt/libfdt_env.h
sed -i 's/__force/FDT_FORCE/' "${workdir}"/rpi-userland/opensrc/helpers/libfdt/libfdt_env.h
echo "compiling rpi userland"
PKGVERSION="$(date +%d%m%Y):${USERLANDREV}"
cat <<-EOF | tee -a "${workdir}"/rpi-userland/CMakeLists.txt
SET(CPACK_GENERATOR "DEB")
SET(CPACK_PACKAGE_NAME "rpiuserland")
SET(CPACK_SET_DESTDIR TRUE)
SET(CPACK_DEBIAN_PACKAGE_MAINTAINER "noone")
SET(CPACK_PACKAGE_VERSION_MAJOR "$PKGVERSION")
SET(CPACK_PACKAGE_VERSION_MINOR "0")
SET(CPACK_PACKAGE_VERSION_PATCH "1~alpha1")
SET(CPACK_DEBIAN_PACKAGE_DEPENDS "libgcc1-armhf-cross,libstdc++6-armhf-cross,libc6-armhf-cross")
include(CPack)
EOF
CROSS_COMPILE=aarch64-linux-gnu- ./buildme --aarch64 &>>"${workdir}"/rpi_userland_build.compile.log
echo "configuring package"
cd "${workdir}"/rpi-userland/build/raspberry/release/ || exit
make package
sudo rm -rf "${deb_temp}"
mkdir -p "${deb_temp}"
sudo rm -rf "${extract_tmp}"
mkdir -p "${extract_tmp}"
dpkg-deb -R "$workdir"/rpi-userland/build/raspberry/release/vmcs_host_apps-1.0-Source.deb "${extract_tmp}"/
cd "${workdir}"/rpi-userland/build/raspberry/release/ && sudo make DESTDIR="${deb_temp}"/ install

sed -i "s/1.0/$PKGVERSION/" "${extract_tmp}"/DEBIAN/control
mv "${extract_tmp}"/DEBIAN "${deb_temp}"/
rm -rf "${extract_tmp}"

mkdir -p "${deb_temp}"/etc/ld.so.conf.d/
echo '/opt/vc/lib' >"${deb_temp}"/etc/ld.so.conf.d/vc.conf

mkdir -p "${deb_temp}"/etc/environment.d
cat <<-EOF >"${deb_temp}"/etc/environment.d/10-vcgencmd.conf
	# /etc/environment.d/10-vcgencmd.conf
	# Do not edit this file
	
	PATH="/opt/vc/bin:/opt/vc/sbin"
	ROOTPATH="/opt/vc/bin:/opt/vc/sbin"
	LDPATH="/opt/vc/lib"
EOF
chmod +x "${deb_temp}"/etc/environment.d/10-vcgencmd.conf

mkdir -p "${deb_temp}"/etc/profile.d/
cat <<-'EOF' >"${deb_temp}"/etc/profile.d/98-rpi.sh
	# /etc/profile.d/98-rpi.sh
	# Adds Raspberry Pi Foundation userland binaries to path
	export PATH="$PATH:/opt/vc/bin:/opt/vc/sbin"
EOF
chmod +x "${deb_temp}"/etc/profile.d/98-rpi.sh

cat <<-EOF >"${deb_temp}"/etc/ld.so.conf.d/00-vmcs.conf
	/opt/vc/lib
EOF
SUDOPATH=$(sudo sed -n 's/\(^.*secure_path="\)//p' /etc/sudoers | sed s'/.$//')
SUDOPATH="${SUDOPATH:-/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin}"
SUDOPATH+=":/opt/vc/bin:/opt/vc/sbin"
# Add path to sudo
mkdir -p "${deb_temp}"/etc/sudoers.d
echo "* Adding rpi util path to sudo."
cat <<-EOF >>"${deb_temp}"/etc/sudoers.d/rpi
	Defaults secure_path=$SUDOPATH
EOF
chmod 0440 "${deb_temp}"/etc/sudoers.d/rpi
sudo chown root:root "${deb_temp}"/etc/sudoers.d/rpi

# Get non-arm64 vcdbg and patch for use on armhf
mkdir -p "${deb_temp}"/usr/arm-linux-gnueabihf/lib
cd "${deb_temp}"/usr/arm-linux-gnueabihf/lib || exit
curl -OL https://github.com/Hexxeh/rpi-firmware/raw/master/vc/hardfp/opt/vc/lib/libdebug_sym.so
curl -OL https://github.com/Hexxeh/rpi-firmware/raw/master/vc/hardfp/opt/vc/lib/libelftoolchain.so
curl -OL https://github.com/Hexxeh/rpi-firmware/raw/master/vc/hardfp/opt/vc/lib/libvcos.so
cd "${deb_temp}"/opt/vc/bin/ || exit
sudo curl -OL https://github.com/Hexxeh/rpi-firmware/raw/master/vc/hardfp/opt/vc/bin/vcdbg
sudo chmod +x "${deb_temp}"/opt/vc/bin/vcdbg
sudo cp "${deb_temp}"/opt/vc/bin/vcdbg "${deb_temp}"/opt/vc/bin/vcdbg.orig
sudo patchelf --force-rpath --set-rpath "/usr/arm-linux-gnueabihf/lib" "${deb_temp}"/opt/vc/bin/vcdbg
sudo patchelf --set-interpreter /usr/arm-linux-gnueabihf/lib/ld-linux-armhf.so.3 "${deb_temp}"/opt/vc/bin/vcdbg

cd "${workdir}"/rpi-userland/build/raspberry/release/ || exit
sudo dpkg-deb --root-owner-group -b "${deb_temp}" "${workdir}"/output/  &>>"${workdir}"/rpi_userland_build.compile.log
sudo rm -rf "${workdir}"/rpi-userland/build/
sudo rm -rf "${tmpdir}"
echo "Package is at ${workdir}/output/rpiuserland_${USERLANDREV}_arm64.deb  ."