Symbol undefined compiling and running Shibboleth apache module in apache 2.2

[Cantor, Scott]

You have a library conflict with different parts of the build being
completed with different dependencies.

Your build mentioned Xerces 2.8, which you should absolutely not be using.
You may wish to use the version that comes with CentOS, but you most
assuredly should not be using something that old and broken.

In any case, you're mixing dependencies. Everything has to be built with
the same set underneath, and you're not doing that somewhere.

-- Scott