makefile 使用者輸入

check_code_update:
ifneq ($(NOW_USE_SCST_VERSION),$(WILL_USE_SCST_VERSION))
    @echo "=========================================="
    @echo "scst version is old"
    @echo "delete SCST source code , get code from git"
    @while [ -z "$$CONTINUE" ]; do \
        read -r -p "Do you want to do it?(y/n)" CONTINUE; \
    done ; \
    echo "========================================="; \
    if [ $$CONTINUE = "y" ] ;then \
        echo haha ; \
    else \
        echo "skip"; \
    fi