依赖项 – 即使安装了库,也会出现YUM依赖项问题

当我在服务器上安装yum install custom-php时,yum会列出一个依赖项问题：

--> Finished Dependency Resolution
Error: Package: custom-php-1.1.x86_64 (php)
           Requires: libmysqlclient.so.18(libmysqlclient_16)(64bit)
Error: Package: custom-php-1.1.x86_64 (php)
           Requires: libmysqlclient.so.18(libmysqlclient_18)(64bit)
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

libmysqlclient.so.18文件由custom-mysql-libs提供,它位于custom-php的spec文件中的Requires下.即使我在发出yum install custom-php之前手动安装了custom-mysql-libs,我仍然会得到上面的错误.

我们的custom-mysql-libs是从mysql源代码构建的,并提供了libmysqlclient.so：

$rpm -qlp custom-mysql-libs-1.0.x86_64.rpm 
/custom/lib64/libmysqlclient.so
/custom/lib64/libmysqlclient.so.18
/custom/lib64/libmysqlclient.so.18.0.0
....
$

当我们在不同的地方安装库时,custom-mysql-libs会在完成后使用/etc/ld.so.conf.d/文件中指定的路径发出ldconfig.我用ldconfig -v验证了这些库是可见的

# ldconfig -v
...
/custom/lib64:
        libmysqlclient.so.18 -> libmysqlclient.so.18.0.0
...
#

Yum还找到了库和包：

# yum whatprovides */libmysqlclient.so.18
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
custom-mysql-libs-1.0.x86_64 : Custom MySQL libraries
Repo        : custom
Matched from:
Filename    : /custom/lib64/libmysqlclient.so.18

custom-mysql-libs-1.0.x86_64 : Custom MySQL libraries
Repo        : installed
Matched from:
Filename    : /custom/lib64/libmysqlclient.so.18

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谢谢 ！