for OS in aix android darwin dragonfly freebsd illumos ios js linux netbsd openbsd plan9 solaris wasip1 windows; do
  for ARCH in ppc64 386 amd64 arm arm64 riscv64 wasm loong64 mips mips64 mips64le mipsle ppc64 ppc64le s390x; do
    OUTPUT="backup_${OS}_${ARCH}"
    [ $OS = "windows" ] && OUTPUT+='.exe'
    GOOS=$OS GOARCH=$ARCH go build -o $OUTPUT git.lhk.o-r.kr/freerer2/simple_backup/cmd
  done
done