SRC = $(wildcard *.go) linux-amd64: build/tarpit-linux-amd64 windows-amd64: build/tarpit-windows-amd64.exe build/tarpit-linux-amd64: $(SRC) GOOS=linux GOARCH=amd64 go build -o "$@" build/tarpit-windows-amd64.exe: $(SRC) GOOS=windows GOARCH=amd64 go build -o "$@"