Installation procedure for x86_64 (64 bit) Fedora 18 Linux:

1. Download the following files to a temporary directory on your 
   system:
    codec2-1223-1.fc18.x86_64.rpm
    freedv-0.96-1.fc18.x86_64.rpm
    libctb-0.16-3.fc18.x86_64.rpm
    wxWidgets-2.9.4-3.fc18.x86_64.rpm

2. Open a terminal window and cd (change directory) to the temporary
   directory you placed the four files downloaded in step #1

3. Become user "root" by entering:
    su

4. Enter the following commands:
    yum localinstall libctb-0.16-3.fc18.x86_64.rpm 
    yum localinstall wxWidgets-2.9.4-3.fc18.x86_64.rpm
    yum localinstall codec2-1223-1.fc18.x86_64.rpm
    yum localinstall freedv-0.96-1.fc18.x86_64.rpm

5. If you would like to get these update via the yum package manager,
   install this file in /etc/yum.repos.d/
   http://n0so.net/fileadmin/ham/apps/rpm/fedora/n0so-ham-apps.repo

That's it! You now should have freedv on your Fedora Linux system.

Notes:
A. There is no desktop icon to start freedv (yet). To run,
   open a terminal window and enter:
        freedv

B. The wxWidgets-2.9 libraries install in /usr/local/lib to 
   avoid conflict with the version that is part of Fedora 18.
   If, the first time freedv is executed it issues an error
   about not finding the libwx_ libraries, try running the
   following command as root:
        ldconfig /usr/local/lib64
   The installer should do this, but just in case...

C. Future updates should only require updating the codec2 or
   freedv rpm files.

D. These rpms are for Fedora 18 Linux. Fedora 17 binaries are
   available in this folder:
   http://n0so.net/fileadmin/ham/apps/rpm/fedora/17/x86_64/

E. Please report any installation problems, especially missing
   dependencies to: n0so@arrl.net

Enjoy!
Mike, N0SO