[ns] Changes made not taking effect after compile

Good day.

I am having trouble with my NS-2 installation. Every time I make changes,
the changes I made do not seem to be reflected after compiling
(./configure; make;). I tried adding printf in the 802_11 mac but
specifically in the Mac802_11::command but when I execute a simulation
script, the added printf does not appear.

--
Carlo Santos