how to install ns v2.26 in Ubuntu with gcc 2.95

Please try this:

http://www.trevorpounds.com/blog/?tag=ubuntu

GCC 2.95 is more than 10 years old (which is to say about 5 years older that ubuntu...) It will be kind of hard to install, you could try downloading it from the official website http://gcc.gnu.org/gcc-2.95/ or check the old debian repositories http://packages.debian.org/etch/gcc-2.95 [1]

As for the other two packages 'xlibs-dev' doesn't exist anymore, now you'll need to use 'xorg-dev'

Hope it helps!

[1] Seeing as the package does exist in debian etch it might be easy to simply install etch http://www.debian.org/releases/etch/index.en.html You'll find it similar to ubuntu (after all ubuntu is based in debian)

Do you know which version of Debian Linux has gcc 2.95 ?

Yes, 'etch' is the version that has gcc 2.95 as you can see from the software repository link I posted before (http://packages.debian.org/etch/gcc-2.95).

Thanks because of your kindly help Dear Mr Federico Vera
But I mean, for example Dedian 2.0 or Debian 1.1 or ... ?
which of them has this kind of gcc .
thanks a lot and thanks because of the time that you spend on it.
I look forward to have you response

I think a good question would be is why do you have to install those specific packages?

If you can tell us then there is a possiblity that we can point you in another direction in order to get the job you want done easier.

Ohh that's the question! sorry... =P I believe etch is version number 4.0 you can download it from http://www.debian.org/releases/etch/index.en.html

You can also try Mark's suggestion (http://www.trevorpounds.com/blog/?tag=ubuntu) it might be easier.

Thank you Dear friends
Dear Nolan I have to install NS-2.26 with MPLS and RSVP-te patches
because of that, I have to install a kind of Linux that support gcc 2.95 and libX11-dev and xlibs-dev
because newer version , encounter some problems when I want to install them.
Can you help me please?

Try these installation instructions:

http://nsnam.isi.edu/nsnam/index.php/User_Information#Ubuntu_Installation_Guide

You should be to install ns using this ppa repository:

https://launchpad.net/~wouterh/+archive/ppa?field.series_filter=karmic

I dont want to install NS2.33 !! or some thing else !!
I have to install NS2.26 in ubuntu with gcc 2.95 !!

apt-cache policy gcc-2.95

may show it available (I'm not on my Ubuntu system to verify)