help2man: can't get `--help' info from automake-1.15 Try `--no-discard-stderr' if option outputs to stderr Makefile:3687: recipe for target 'doc/automake-1.15.1' failed

/**********************************************************************
 *    help2man: can't get `--help' info from automake-1.15 Try `--no-discard-stderr' if option outputs to stderr Makefile:3687: recipe for target 'doc/automake-1.15.1' failed
 * 说明：
 *     在Ubuntu 18.04上编译Yocto，出现automake使用错误。
 *
 *                                2018-6-13 深圳 宝安西乡 曾剑锋
 *********************************************************************/

一、参考文档：
    . compiling coreutils: help2man: can't get `--help' info from man/cp.td/cp Try `--no-discard-stderr'
        http://albertcn.blog.163.com/blog/static/2094201452015229784694/

二、解决方法：
    修改Makefile源代码: /home/zengjf/zengjf/fsl-release-bsp/imx6q-x11/tmp/work/x86_64-linux/automake-native/1.15-r0/build/Makefile
        [...省略]
        doc/aclocal-$(APIVERSION).: $(aclocal_script) lib/Automake/Config.pm
                $(update_mans) aclocal-$(APIVERSION)
        doc/automake-$(APIVERSION).: $(automake_script) lib/Automake/Config.pm
                $(update_mans) automake-$(APIVERSION) --no-discard-stderr
        [...省略]