add help for host-only networking

target/arm/Makefile

@@ -16,6 +16,7 @@ MACH:=spitz
 endif
 ifeq ($(ADK_TARGET_QEMU_ARM_MODEL_VERSATILE),y)
 MACH:=versatilepb
+NET:=-net user,hostfwd=tcp::2222-:22 -net nic,model=smc91c111
 endif
 
 tools-compile:
@@ -57,7 +58,7 @@ ifeq ($(ADK_TARGET_SYSTEM_QEMU_ARM),y)
 	@echo "Use following command to create a QEMU Image:"
 	@echo "sudo ./scripts/create-image.sh -f $(ADK_TARGET_ROOTFS) qemu-${CPU_ARCH}.img $(BIN_DIR)/$(ROOTFSTARBALL)"
 	@echo "Start qemu with following options:"
-	@echo 'qemu-system-arm -M $(MACH) -nographic -kernel $(BIN_DIR)/$(TARGET_KERNEL) -hda qemu-${CPU_ARCH}.img -append "root=/dev/hda1"'
+	@echo 'qemu-system-arm -M $(MACH) -nographic $(NET) -kernel $(BIN_DIR)/$(TARGET_KERNEL) -hda qemu-${CPU_ARCH}.img -append "root=/dev/hda1"'
 endif
 endif
 ifeq ($(ADK_TARGET_FS),initramfs)
@@ -71,7 +72,7 @@ endif
 	@echo 'The initramfs image is: ${BIN_DIR}/${INITRAMFS}'
 ifeq ($(ADK_TARGET_SYSTEM_QEMU_ARM),y)
 	@echo "Start qemu with following command line:"
-	@echo 'qemu-system-arm -M $(MACH) -nographic -kernel $(BIN_DIR)/$(TARGET_KERNEL) -initrd ${BIN_DIR}/${INITRAMFS}'
+	@echo 'qemu-system-arm -M $(MACH) -nographic $(NET) -kernel $(BIN_DIR)/$(TARGET_KERNEL) -initrd ${BIN_DIR}/${INITRAMFS}'
 endif
 endif
 ifeq ($(ADK_TARGET_FS),initramfs-piggyback)
@@ -84,6 +85,6 @@ endif
 	@echo 'The kernel+initramfs file is: $(BIN_DIR)/${TARGET_KERNEL}'
 ifeq ($(ADK_TARGET_SYSTEM_QEMU_ARM),y)
 	@echo "Start qemu with following command line:"
-	@echo 'qemu-system-arm -M $(MACH) -nographic -kernel $(BIN_DIR)/$(TARGET_KERNEL)'
+	@echo 'qemu-system-arm -M $(MACH) -nographic $(NET) -kernel $(BIN_DIR)/$(TARGET_KERNEL)'
 endif
 endif