Error while using ./configure command while recompiling ns2.

First install ns2.34 successfully using the installation script as follows :

Change to allinone-2.34/ folder

# ./install

It will install tclcl.

After successful installation, edit the .profile or .bash_profile with settings.
(for example, the following link will provide the profile settings for ns2.28
http://www.projectguideline.com/modules.php?name=News&file=article&sid=9)

After that only tclcl will be in path (the linux shell can recognize it) and you can separately compile ns-2.34 again if necessary as follows :.

allinone-2.34/ns-2.34$ ./configure