Makefile.in is Newer Than Makefile in Ns2 Solved

Hello Every one
While you are adding new class or modifying existing one, you encounter this problem.
when u type in terminal "Make clean or make " for compilation, it shows u Makefile.in is newer than Makefile.

So Follow following steps.

step 1. Go to ur ns-2.35 directory
step 2. type sudo gedit Makefile
step 3. type ur password and it will open Makefile
step 4. Make necessary  changes that u have made earlier in Makefile.in
step 5. Save and close file.
step 6. type make clean // remember u must b in ns-2.35 directory
step 7. type make 

 it will compile your class and will create object file. Now if there are no errors, u are done