Installing GCC-4.3.0 in Fedora 16

[Bruno Wolff III]

On Sat, Feb 25, 2012 at 17:05:54 +0530,
  R Logeshwaran <logesh.ieee at gmail.com> wrote:
> Hi I'm a research scholar doing my research in networking for that i use
> NS-2 package (ns-allinone-2.29). it will work good in Fedora-9 which uses
> GCC-4.3.
> My system is a new one it is not possible for me to install Fedora-9. So i
> have installed Fedora 16, but now NS.2.29 is not working in fedora 16 since
> the GCC compiler is 4.6.
> so i need a solution to downgrade gcc to 4.3.0 version. else solution to
> run NS2.29 in fedora16
> please help me...
> thanking you

Wouldn't it make more sense to fix ns-allinone to build with more recent
versions of gcc?