1) The spec file has "./configure
--prefix=$RPM_BUILD_ROOT/usr".  This causes the wrong
configuration directory path to be built into the library.

Using %configure alone and specifying in the %install
section "make prefix=$RPM_BUILD_ROOT/usr install" solves the
problem.

2) The spec file should use a version macro, as the version
is explicity used in several places.  Including a README
file which is not found because of the wrong version listed.

3) Symbolic links for libraries should not be made in a spec
file.  This is the job of ldconfig.

These are common mistakes that all spec files should be
checked for.