Cross Build Static aarch64 Ubound Binary on Alpine x86_x64

Cross_Build_Static_Ubound

#!/bin/sh

set -e

OPENSSL_TAG=OpenSSL_1_1_1k
LIBEXPAT_TAG=R_2_4_1
LIBEVENT_TAG=release-2.1.12-stable
LIBSODIUM_TAG=1.0.18-RELEASE
STANDARD="c++17"
RESULT="`pwd`/result"

install_dir="`pwd`/aarch64"
include_dir="${install_dir}/include"
lib_dir="${install_dir}/lib"

PATH="${install_dir}/bin:${HOME}/bin${PATH:+:${PATH}}"
LD_LIBRARY_PATH="-L${lib_dir}"
PKG_CONFIG_PATH="-L${lib_dir}/pkgconfig"

custom_flags_set() {
    CXXFLAGS="-std=${STANDARD}"
    CPPFLAGS="--static -static -I${include_dir}"
    LDFLAGS="--static -static -Wl,--no-as-needed -L${lib_dir} -lpthread -pthread"
}

custom_flags_reset() {
    CXXFLAGS="-std=${STANDARD}"
    CPPFLAGS=""
    LDFLAGS=""
}

custom_flags_reset

reset_libs () {

    rm -rf aarch64/

    #openssl
    rm -rf openssl/
    git clone https://github.com/openssl/openssl.git --branch $OPENSSL_TAG --single-branch --depth 1
    cd openssl
    custom_flags_set
    ./Configure linux-aarch64 --cross-compile-prefix=aarch64-linux-musl- --prefix="${install_dir}" threads no-shared no-dso no-comp CXXFLAGS="${CXXFLAGS}" CPPFLAGS="${CPPFLAGS}" LDFLAGS="${LDFLAGS}"
    make -j${nproc}
    make install_sw install_ssldirs
    cd ..

    #libexpat
    rm -rf libexpat/
    git clone https://github.com/libexpat/libexpat.git --branch $LIBEXPAT_TAG --single-branch --depth 1
    cd libexpat
    custom_flags_set
    cd expat
    rm -rf build
    mkdir build
    ./buildconf.sh
    cd ./build
    ../configure --prefix="${install_dir}" --host=aarch64-linux-musl
    make -j${nproc}
    make install
    cd ../../../

    #libevent
    rm -rf libevent/
    git clone https://github.com/libevent/libevent.git --branch $LIBEVENT_TAG --single-branch --depth 1
    cd libevent
    ./autogen.sh
    custom_flags_set
    ./configure --prefix="${install_dir}" --host=aarch64-linux-musl CC=aarch64-linux-musl-gcc CXX=aarch64-linux-musl-g++ CPPFLAGS="${CPPFLAGS}" LDFLAGS="${LDFLAGS}"
    make -j${nproc}
    make install
    cd ..

    #libsodium
    rm -rf libsodium/
    git clone https://github.com/jedisct1/libsodium.git --branch $LIBSODIUM_TAG --single-branch --depth 1
    cd libsodium
    ./autogen.sh
    custom_flags_set
    ./configure --prefix="${install_dir}" --host=aarch64-linux-musl CC=aarch64-linux-musl-gcc CXX=aarch64-linux-musl-g++ CPPFLAGS="${CPPFLAGS}" LDFLAGS="${LDFLAGS}"
    make -j${nproc}
    make install
    cd ..

}

RESET="$2"

[ -n "$RESET" -a "$RESET" = "reset" ] && reset_libs

#unbound
rm -rf unbound/
git clone --depth=1 https://github.com/NLnetLabs/unbound.git
cd unbound

COND="$1"
[ $# -eq 0 ] && COND="full"

case $COND in
full)
    ./configure --prefix=/usr/local --disable-flto --enable-subnet --enable-cachedb --enable-dnscrypt --with-libevent="${install_dir}" --with-ssl="${install_dir}" --with-libexpat="${install_dir}" --host=aarch64-linux-musl
    ;;
normal)
    ./configure --prefix=/usr/local --disable-flto --enable-subnet --with-libevent="${install_dir}" --with-ssl="${install_dir}" --with-libexpat="${install_dir}" --host=aarch64-linux-musl
    ;;
lite)
    ./configure --prefix=/usr/local -disable-flto --disable-sha1 --disable-sha2 --disable-gost --disable-ecdsa --disable-dsa --disable-ed25519 --disable-ed448 --enable-subnet --with-libevent="${install_dir}" --with-ssl="${install_dir}" --with-libexpat="${install_dir}" --host=aarch64-linux-musl
#    --with-ssl=/mmc -with-libexpat=/mmc
    ;;
*)
    echo "Usage: $0 (full|normal|lite) [reset]"
    exit 1
esac

[ $? -ne 0 ] && { echo "configure error."; exit 2; }

sed -i '/LDFLAGS/ s/$/ -all-static -s/' ./Makefile
sed -i '/LIBS/ s/$/ -ldl/' ./Makefile
make -j${nproc}
make install DESTDIR=$RESULT