YUM dependency issue even though library is installed

dependenciesrpm

We build our own php and mysql packages from source, this one is for the php-5.4.10 release, and host these at our own repository. Let's call this package custom-php and custom-mysql(-libs & -server)

When I do a yum install custom-php on a server, yum lists a dependency problem:

--> 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

The file libmysqlclient.so.18 is provided by custom-mysql-libs which is listed under Requires in the spec file of custom-php. Even if I install custom-mysql-libs manually before issuing the yum install custom-php I still get the error above.

Our custom-mysql-libs is built from the mysql source code and provides the 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
....
$

As we install the libraries at a different place the custom-mysql-libs issues a ldconfig with the path specified in a file under /etc/ld.so.conf.d/ after completion. I verified that the libraries are visible with a ldconfig -v

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

Yum does also find the library and package:

# 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

Any help is appreciated.
Thanks !

Best Answer

rpm does not know anything about local filesystems. It only looks in it's own database for what is on the system. In your case that is a non-standard place to put the library. Generally the standard place is in /usr/lib64/mysql/ and yours is in /custom so rpm is not finding it where it should be.

Here are two options..

1) rebuild the custom one by adding some symlinks and that might work (really un-tested)

2) Force the install with the --no-deps flag and symlink the mysqllibrary files from /custom to /usr/lib64/mysql/

I don't think there is any magic command that we can give you to make it work as you are hoping.

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