Merge pull request #882 from ondrej-fabry/makefile

Build enhancements

Makefile

@@ -2,7 +2,7 @@ include vpp.env
 
 VERSION	?= $(shell git describe --always --tags --dirty)
 COMMIT	?= $(shell git rev-parse HEAD)
-DATE	:= $(shell date +'%Y-%m-%dT%H:%M%:z')
+DATE	:= $(shell git log -1 --format="%ct" | xargs -I{} date -d @{} +'%Y-%m-%dT%H:%M%:z')
 
 CNINFRA := github.com/ligato/vpp-agent/vendor/github.com/ligato/cn-infra/agent
 LDFLAGS = -X $(CNINFRA).BuildVersion=$(VERSION) -X $(CNINFRA).CommitHash=$(COMMIT) -X $(CNINFRA).BuildDate=$(DATE)
@@ -11,6 +11,11 @@ ifeq ($(NOSTRIP),)
 LDFLAGS += -w -s
 endif
 
+ifeq ($(BUILDPIE),y)
+GO_BUILD_ARGS += -buildmode=pie
+LDFLAGS += -extldflags=-Wl,-z,now,-z,relro
+endif
+
 ifeq ($(V),1)
 GO_BUILD_ARGS += -v
 endif