Problem installing ettercap.6.b
 

When i run the ./configure for ettercap.6b i get an error message as follows: Libary requirements (gtk+-2.0>=2.0.0 pango >= 1.0 atk > =1.0) not met consider adjusting PKG_CONFIG_PATH. Anybody know where this variable is or if this is actually the problem with the install? Thanks!

tobsai