Protected multilib versions问题解决

记录一下Protected multilib versions问题。

今天yum update时候出现了错误：
--> Finished Dependency Resolution
Error: Multilib version problems found. This often means that the root
cause is something else and multilib version checking is just
pointing out that there is a problem. Eg.:
...
Protected multilib versions: libgcc-4.8.5-44.el7.i686 != libgcc-4.8.5-39.el7.x86_64

搜了一下都说要rpm -e，然而这样似乎并不行
正确操作是，先查询冲突的包有哪些版本：

rpm -q libgcc

得到：
libgcc-4.8.5-39.el7.x86_64
libgcc-4.8.5-39.el7.i686
libgcc-4.8.5-44.el7.x86_64

再把冲突的包用yum卸载：

yum remove libgcc-4.8.5-39.el7.x86_64
yum remove libgcc-4.8.5-39.el7.i686

再yum update就可以了