[ns] ns-2.26 installation problem

[Iyad Tumar]

Dear all,

i am in need to install ns-2.26 and i am trying to install ns-2.26  on  
ubuntu and i got the following error.

n file included from tclcl.h:48,
                 from Tcl.cc:47:
tclcl-mappings.h: In static member function ‘static int  
TclObjectHelper<T>::dispatch_(void*, Tcl_Interp*, int, char**)’:
tclcl-mappings.h:51: error: incomplete type ‘Tcl’ used in nested name  
specifier
tclcl-mappings.h:52: error: invalid use of incomplete type ‘struct Tcl’
tclcl-mappings.h:41: error: forward declaration of ‘struct Tcl’
tclcl-mappings.h:57: error: invalid use of incomplete type ‘struct Tcl’
tclcl-mappings.h:41: error: forward declaration of ‘struct Tcl’
make: *** [Tcl.o] Error 1
tclcl-1.0b13 make failed! Exiting ...
See http://www.isi.edu/nsnam/ns/ns-problems.html for problems
itumar at Tumar:/usr/local/dload/ns-allinone-2.26$



any help please
Best
Iyad