Installation troubles on Redhat V 8.0

I am having trouble installing PostgreSQL-7.4.5 on Redhat V 8.0.

I extracted the files with tar into the directory /usr/local/pgsql

When I run the configure script with no command line options I get the 
following errors:

configure: error: readline library not found
If you have readline already installed, see config.log for details on the
failure.  It is possible the compiler isn't looking in the proper directory.
Use --without-readline to disable readline support.

From what I understand, I do not want to run the script with the option of 
--without-readline.
What file is this section of the script looking for and where is it supposed 
to be located?  If I do not have the file can I download if from somewhere?

Thanks the the help in advance.

Wayne Unruh

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