otherwise someone copy the repo from local computer and add to other repo as depend source , will encounter:
No rule to make target 'ss-nat', needed by 'all-am'. Stop.
to reproduce this error:
git clone https://github.com/shadowsocks/shadowsocks-libev.git
cd my_exist_repo
cp -rv ../shadowsocks-libev ./
rm -rf ./shadowsocks-libev/.git
git add ./shadowsocks-libev #now the src/ss-nat will silently be ignored ...
荒野无灯