fix: Only one ldflags flag is allowed

Signed-off-by: Jack Chen <[email protected]>

Makefile

@@ -1,9 +1,9 @@
 .PHONY: build test clean prepare update docker
 
 # change the following boolean flag to enable or disable the Full RELRO (RELocation Read Only) for linux ELF (Executable and Linkable Format) binaries
-ENABLE_FULL_RELRO:="true"
+ENABLE_FULL_RELRO=true
 # change the following boolean flag to enable or disable PIE for linux binaries which is needed for ASLR (Address Space Layout Randomization) on Linux, the ASLR support on Windows is enabled by default
-ENABLE_PIE:="true"
+ENABLE_PIE=true
 
 MICROSERVICES=cmd/device-uart
 
@@ -15,15 +15,17 @@ DOCKERS=docker_device_uart
 VERSION=$(shell cat ./VERSION 2>/dev/null || echo 0.0.0)
 GIT_SHA=$(shell git rev-parse HEAD)
 SDKVERSION=$(shell cat ./go.mod | grep 'github.com/edgexfoundry/device-sdk-go/v4 v' | awk '{print $$2}')
-GOFLAGS=-ldflags "-X github.com/edgexfoundry/device-uart.Version=$(VERSION) \
-                  -X github.com/edgexfoundry/device-sdk-go/v4/internal/common.SDKVersion=$(SDKVERSION)" \
-                   -trimpath -mod=readonly
 
-ifeq ($(ENABLE_FULL_RELRO), "true")
-	GOFLAGS += -ldflags "-bindnow"
+ifeq ($(ENABLE_FULL_RELRO), true)
+	ENABLE_FULL_RELRO_GOFLAGS = -bindnow
 endif
 
-ifeq ($(ENABLE_PIE), "true")
+GOFLAGS=-ldflags "-X github.com/edgexfoundry/device-uart.Version=$(VERSION) \
+                  -X github.com/edgexfoundry/device-sdk-go/v4/internal/common.SDKVersion=$(SDKVERSION) \
+                  $(ENABLE_FULL_RELRO_GOFLAGS)" \
+                   -trimpath -mod=readonly
+
+ifeq ($(ENABLE_PIE), true)
 	GOFLAGS += -buildmode=pie
 endif