I'll briefly summarize this blog post on installing rdesktop on Centos 7.

First, we'll set up the RPM build environment (as your local user):

$ sudo yum install rpm-build make gcc
$ mkdir -p ~/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
$ echo '%_topdir %(echo $HOME)/rpmbuild' > ~/.rpmmacros

Now, fetch and install the source …