jsp-config 标签库问题

<jsp-config>
   <taglib>
        <taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
        <taglib-location>/WEB-INF/tld/c.tld</taglib-location>
   </taglib>
   <taglib>
        <taglib-uri>http://java.sun.com/jsp/jstl/fmt</taglib-uri>
        <taglib-location>/WEB-INF/tld/fmt.tld</taglib-location>
   </taglib>
   <taglib>
        <taglib-uri>http://java.sun.com/jsp/jstl/functions</taglib-uri>
        <taglib-location>/WEB-INF/tld/fn.tld</taglib-location>
   </taglib>       
</jsp-config>

jsp-config 标签加上之后启动tomcat 提示我找不到
警告: Failed to process TLD with path [/WEB-INF/tld/fn.tld] and URI [http://java.sun.com/jsp/jstl/functions]. The specified path does not exist.

不加上不提示找不到。但是定义规范不对。

可能是你没有设置好库。我用的idea，文件目录和工程结果依赖的库如上图。