Replace double colons with .PHONY targets

Makefile

@@ -55,7 +55,8 @@ SRC := $(wildcard *.c)
 GRAFTCP_LOCAL_BIN = local/graftcp-local local/mgraftcp
 TARGET = graftcp $(GRAFTCP_LOCAL_BIN)
 
-all:: $(TARGET)
+.PHONY: all clean
+all: $(TARGET)
 
 
 graftcp: main.o graftcp.o util.o cidr-trie.o conf.o
@@ -73,30 +74,31 @@ local/graftcp-local:
 local/mgraftcp: libgraftcp.a
 	$(MAKE) -C $(dir $@) VERSION=$(VERSION) CC=$(CC) CXX=$(CXX) AR=$(AR) $(notdir $@)
 
-install:: graftcp $(GRAFTCP_LOCAL_BIN)
+.PHONY: install uninstall install_graftcp uninstall_graftcp install_graftcp_local uninstall_graftcp_local
+
+install: graftcp $(GRAFTCP_LOCAL_BIN)
 	$(INSTALL) $< $(DESTDIR)$(BINDIR)/$<
 	$(MAKE) -C local $@
 
-uninstall::
+uninstall:
 	-rm -f $(DESTDIR)$(BINDIR)/graftcp
 	$(MAKE) -C local $@
 
-install_graftcp:: graftcp
+install_graftcp: graftcp
 	$(INSTALL) $< $(DESTDIR)$(BINDIR)/$<
 
-uninstall_graftcp::
+uninstall_graftcp:
 	-rm -f $(DESTDIR)$(BINDIR)/graftcp
 
-install_systemd::
-	$(MAKE) -C local install_systemd
+.PHONY: install_systemd enable_systemd disable_systemd uninstall_systemd
 
-uninstall_systemd::
-	$(MAKE) -C local uninstall_systemd
+%_systemd:
+	$(MAKE) -C local $@
 
-install_graftcp_local::
+install_graftcp_local:
 	$(MAKE) -C local install
 
-uninstall_graftcp_local::
+uninstall_graftcp_local:
 	$(MAKE) -C local uninstall
 
 sinclude $(SRC:.c=.d)
@@ -107,6 +109,6 @@ sinclude $(SRC:.c=.d)
 		sed 's,\(.*\)\.o[:]*,\1.o $@:,' < $@.$$$$ > $@; \
 		rm -f $@.$$$$
 
-clean::
+clean:
 	-rm -f *.o *.a graftcp *.d
 	$(MAKE) -C local $@

local/Makefile

@@ -22,23 +22,25 @@ INSTALL = install -D
 
 TARGET = graftcp-local mgraftcp
 
-all:: $(TARGET)
+.PHONY: all clean ../libgraftcp.a install install_systemd enable_systemd disable_systemd uninstall_systemd uninstall install_service uninstall_service
+
+all: $(TARGET)
 
 graftcp-local: $(wildcard *.go cmd/graftcp-local/*.go)
 	${GO_BUILD_PREFIX_FLAGS} go build -ldflags "-s -w -X main.version=${VERSION}" ./cmd/graftcp-local
 
 mgraftcp: $(wildcard *.go cmd/mgraftcp/*.go) ../libgraftcp.a
 	${GO_BUILD_PREFIX_FLAGS} ${CGO_FLAGS} go build -ldflags "-s -w -X main.version=${VERSION}" ./cmd/mgraftcp
 
-../libgraftcp.a::
+../libgraftcp.a:
 	$(MAKE) -C .. libgraftcp.a
 
-install:: $(TARGET)
+install: $(TARGET)
 	$(INSTALL) $^ $(DESTDIR)$(BINDIR)/
 
 SYSTEMD_UNIT_DIR:=$(shell pkg-config --variable=systemdsystemunitdir systemd 2>/dev/null)
 
-install_systemd:: install
+install_systemd: install
 	$(if $(SYSTEMD_UNIT_DIR),,$(error SYSTEMD_UNIT_DIR is not defined))
 	test -f $(DESTDIR)/etc/graftcp-local/graftcp-local.conf || \
 		install -Dm644 example-graftcp-local.conf $(DESTDIR)/etc/graftcp-local/graftcp-local.conf
@@ -47,26 +49,26 @@ ifneq ($(PREFIX),/usr/)
 	sed -i -re 's#/usr/bin/graftcp-local#$(subst #,\#,${PREFIX})/bin/graftcp-local#g' ${DESTDIR}/${SYSTEMD_UNIT_DIR}/graftcp-local.service
 endif
 
-enable_systemd::
+enable_systemd:
 	@echo "Enable and start the graftcp-local systemd unit"
 	systemctl daemon-reload && systemctl --now enable graftcp-local.service
 
-disable_systemd::
+disable_systemd:
 	@echo "Disable and stop the graftcp-local systemd unit"
 	systemctl disable --now graftcp-local.service
 
-uninstall_systemd:: disable_systemd
+uninstall_systemd: disable_systemd
 	$(if $(SYSTEMD_UNIT_DIR),,$(error SYSTEMD_UNIT_DIR is not defined))
 	rm -f ${DESTDIR}/${SYSTEMD_UNIT_DIR}/graftcp-local.service
 
-uninstall::
+uninstall:
 	-rm -f $(DESTDIR)$(BINDIR)/mgraftcp $(DESTDIR)$(BINDIR)/graftcp-local
 
-install_service:: graftcp-local
+install_service: graftcp-local
 	graftcp-local -service install && graftcp-local -service start
 
-uninstall_service:: graftcp-local
+uninstall_service: graftcp-local
 	graftcp-local -service stop && graftcp-local -service uninstall
 
-clean::
+clean:
 	-rm -rf $(TARGET)