make clean can not completely clean NS2 objects

Here is an example:
I defined a TracedInt in tcp.h. Compiled, and runned.

Then I found I should define it as a TracedDouble. So I changed from TracedInt to TracedDouble.
The c++ part worked fine.

But it seems that the ns2 always output the traced variable as in int format. (This should be the problem of linking tclcl-1.16/tracedvar.cc with cpp...

I "make clean" but it does not help.

I think this is sth related to the tcl binding problem.... still not sure what happened yet...

I cannot re-link