Compile kiss-ftpd ( rust language program ) for android set-top box

The busybox comes with a messy ftp code, so I want to compile a kiss-ftpd to be used on the set-top box.

First, the rustup target add aarch64-linux-android

Then install the Android NDK, I used Android Studio to install it, screenshot below.

Of course, you can also download the NDK directly to unpack it.

In 2021, the highest version of NDK supported by rust is 22.1.7171670, so use this one first.

Finally, the compilation script is as follows.

#!/usr/bin/env bash

DIR=$(cd "$(dirname "$0")"; pwd)
set -ex
cd $DIR

export API=30
export NDK_VERSION=22.1.7171670

export TARGET=aarch64-linux-android

export os=`uname -s|awk '{ print tolower($0) }'`
export NDK=$HOME/Library/Android/sdk/ndk/$NDK_VERSION
export ANDROID_NDK_HOME=$NDK
export TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/$os-x86_64
export PATH=$TOOLCHAIN/bin:$PATH
export AR=$TOOLCHAIN/bin/llvm-ar
export AS=$TOOLCHAIN/bin/$TARGET-as
export CC=$TOOLCHAIN/bin/$TARGET$API-clang
export CXX=$TOOLCHAIN/bin/$TARGET$API-clang++
export LD=$TOOLCHAIN/bin/$TARGET-ld
export RANLIB=$TOOLCHAIN/bin/$TARGET-ranlib
export STRIP=$TOOLCHAIN/bin/$TARGET-strip

CARGO_TARGET=`echo ${TARGET//-/_} | awk '{ print toupper($0) }'`
export CARGO_TARGET_${CARGO_TARGET}_LINKER=$CC

echo 'AR = '$AR
echo 'AS = '$AS
echo 'CC = '$CC
echo 'CXX = '$CXX
echo 'LD = '$LD
echo 'RANLIB = '$RANLIB
echo 'STRIP = '$STRIP

RUST_BACKTRACE=1 \
cargo +nightly build --release --target aarch64-linux-android