MAODV on newer versions of NS and Linux

Since the versoin of MAODV you are using is meant for ns 2.26, running it on ns2.26 only be the easy choice. Further, ns 2.26 can be installed on old Red Hat linux versions without any problem. – Now you are spending your efforts in correct direction. -It is the best way of doing this.

You can possibly compile ns2.26 successfully on resent versions of Fedora or Ubuntu just by using old version of gcc and correcting some errors. – But I will not prefer it.

You may use a resent version of ns2 on Fedora or Ubuntu – but in that case, the MAODV patch will fail. You may compile ns2 with MAODV by applying the MAODV patch manually (if possible) and correct some errors. – But certainly it will require lot of effort.