pijul-windows/zstd.md

# let it be
apk add alpine-sdk llvm llvm-dev gcc shadow bash openssl-dev libsodium-dev perl
apk add curl openssl-libs-static libsodium-static zstd-static
apk add make mingw-w64-gcc

wget https://github.com/facebook/zstd/releases/download/v1.5.6/zstd-1.5.6.tar.gz
gunzip zstd-1.5.6.tar.gz
tar xvf zstd-1.5.6.tar
cd zstd-1.5.6

make TARGET_SYSTEM=Windows CC=x86_64-w64-mingw32-gcc
ls -l lib/libzstd.a

# copy
cp lib/libzstd.a /usr/x86_64-w64-mingw32/lib/