报错如下：
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package mariadb-devel.x86_64 1:5.5.68-1.el7 will be installed
--> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.68-1.el7 for package: 1:mariadb-devel-5.5.68-1.el7.x86_64
--> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 1:mariadb-devel-5.5.68-1.el7.x86_64
--> Running transaction check
---> Package mariadb-libs.x86_64 1:5.5.68-1.el7 will be installed
Removing mariadb-libs.x86_64 1:5.5.68-1.el7 - u due to obsoletes from installed mysql-community-libs-8.0.25-1.el7.x86_64
--> Restarting Dependency Resolution with new changes.
--> Running transaction check
---> Package mariadb-libs.x86_64 1:5.5.68-1.el7 will be installed
--> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.68-1.el7 for package: 1:mariadb-devel-5.5.68-1.el7.x86_64
--> Processing Dependency: libmysqlclient.so.18()(64bit) for package: 1:mariadb-devel-5.5.68-1.el7.x86_64
--> Finished Dependency Resolution
Error: Package: 1:mariadb-devel-5.5.68-1.el7.x86_64 (base)
Requires: libmysqlclient.so.18()(64bit)
Error: Package: 1:mariadb-devel-5.5.68-1.el7.x86_64 (base)
Requires: mariadb-libs(x86-64) = 1:5.5.68-1.el7
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
原因
yum缺少mysql源，导致在安装mysql-devel的时候会提示安装mariadb-devel-5.5.50-1.el7_2.x86_64，并且系统并没有mysql_config
解决办法
wget http://repo.mysql.com/mysql80-community-release-el7-6.noarch.rpm
rpm -ivh mysql57-community-release-el7-10.noarch.rpm
本例使用的是mysql8.0.25，注意你使用的版本，如果是5.7，使用
wget http://repo.mysql.com/mysql57-community-release-el7-10.noarch.rpm
rpm -ivh mysql57-community-release-el7-10.noarch.rpm