add Makefile

Makefile

@@ -0,0 +1,18 @@
+SRC     := $(wildcard *.go) main/client.go
+BIN     := bin
+CLIENT  := ${BIN}/client
+GOPATH  ?= ${PWD}
+
+all: client
+
+client: ${CLIENT}
+
+${CLIENT}: ${SRC}
+	@echo build $@
+	@GOPATH=${GOPATH} go build -o $@ -- main/client.go
+
+clean:
+	@echo clean ${BIN}
+	@rm -f ${BIN}/*
+
+.PHONY: all client clean