wsl-build-static-bsdtar

# build static bsdtar linked against musl in Ubuntu 16.04 on WSL

mkdir bsdtarbuild && cd bsdtarbuild
sudo su 
ALPINE_MIRROR=http://dl-cdn.alpinelinux.org/alpine
mkdir alpine-root
ALPINE_ROOT=$PWD/alpine-root
ALPINE_APKTOOLS=apk-tools-static-2.9.1-r0.apk # note this is a moving target
wget -q $ALPINE_MIRROR/latest-stable/main/x86_64/$ALPINE_APKTOOLS
tar xf $ALPINE_APKTOOLS
./sbin/apk.static -X $ALPINE_MIRROR/latest-stable/main -U --allow-untrusted --root $ALPINE_ROOT --initdb add alpine-base
cd $ALPINE_ROOT
mount -o bind /dev ./dev
mount -t proc none ./proc
mount -t sysfs none ./sys
echo "$ALPINE_MIRROR/latest-stable/main" > ./etc/apk/repositories
echo "$ALPINE_MIRROR/latest-stable/community" >> ./etc/apk/repositories
cp -p /etc/resolv.conf etc/
cd ..
chroot ./alpine-root /bin/sh -l
apk update
apk add alpine-sdk bash util-linux strace file
adduser -D build
su build
cd ~
echo "export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" >> .bashrc
echo "export PS1='(alpine) \u@\h:\w$ '" > .bashrc
exec /bin/bash
wget https://www.libarchive.org/downloads/libarchive-3.3.2.tar.gz
tar xf libarchive-3.3.2.tar.gz
cd libarchive-3.3.2
./configure LDFLAGS='--static' --enable-bsdtar=static --disable-shared
make -j4
# meh, I never liked libtool anyway...
ld -static -o bsdtar tar/bsdtar-bsdtar.o tar/bsdtar-cmdline.o tar/bsdtar-creation_set.o \
tar/bsdtar-read.o tar/bsdtar-subst.o tar/bsdtar-util.o tar/bsdtar-write.o \
/usr/lib/crt1.o .libs/libarchive.a .libs/libarchive_fe.a /usr/lib/libc.a
exit # out of build user
exit # out of chroot
umount ./alpine-root/dev
umount ./alpine-root/proc
umount ./alpine-root/sys
exit # out of sudo su
cp -a alpine-root/home/build/libarchive-3.3.2/bsdtar .
./bsdtar --version
file ./bsdtar
# for posterity...
sudo ./bsdtar czvpf alpine-root.tgz alpine-root