<code bash>
define SQUID_INSTALL_INIT_SYSV
        $(INSTALL) -m 755 -D package/squid/S97squid \
                $(TARGET_DIR)/etc/init.d/S97squid
endef

define SQUID_INSTALL_INIT_SYSTEMD
        $(INSTALL) -D -m 0644 $(@D)/tools/systemd/squid.service \
                $(TARGET_DIR)/usr/lib/systemd/system/squid.service
        mkdir -p $(TARGET_DIR)/etc/systemd/system/multi-user.target.wants
        ln -sf ../../../..//usr/lib/systemd/system/squid.service \
                $(TARGET_DIR)/etc/systemd/system/multi-user.target.wants/squid.service
endef
</code>