Add basic Makefile

Makefile

@@ -0,0 +1,21 @@
+PROJECT?=github.com/edgebox-iot/sysctl
+
+RELEASE ?= dev
+COMMIT := $(shell git rev-parse --short HEAD)
+BUILD_DATE := $(shell date -u '+%Y-%m-%d_%H:%M:%S')
+BUILD_DIR = bin
+
+build-all:
+	GOOS=linux GOARCH=amd64 make build
+
+build:
+	@echo "Building ${GOOS}-${GOARCH}"
+	GOOS=${GOOS} GOARCH=${GOARCH} go build \
+		-trimpath -ldflags "-s -w -X ${PROJECT}/internal/diagnostics.Version=${RELEASE} \
+		-X ${PROJECT}/internal/diagnostics.Commit=${COMMIT} \
+		-X ${PROJECT}/internal/diagnostics.BuildDate=${BUILD_DATE}" \
+		-o bin/sysctl-${GOOS}-${GOARCH} ${PROJECT}
+
+clean:
+	rm -rf ${BUILD_DIR} ${DIST_DIR}
+	go clean