Error in invoking target 'agent nmhs' of makefile
官方的解释为：
Unpublished bug 19692824
During installation of Oracle Database or Oracle RAC on OL7, the following linking error may be encountered:
Error in invoking target 'agent nmhs' of makefile '<ORACLE_HOME>/sysman/lib/ins_emagent.mk'. See '<installation log>' for details.
If this error is encountered, the user should select Continue. Then, after the installation has completed, the user must download Patch 19692824 from My Oracle Support and apply it per the instructions included in the patch README.
如果发生这个报错，继续安装，完成安装后用户需要下载补丁包打补丁
可以用这个解决方法：
修改$ORACLE_HOME/sysman/lib/ins_emagent.mk，将$(MK_EMAGENT_NMECTL)修改为：$(MK_EMAGENT_NMECTL) -lnnz11
进入vi编辑器后 命令模式输入/NMECTL进行查找，快速定位要修改的行在后面追加参数-lnnz11 第一个是字母l 后面两个是数字1
保存退出后Retry