[gsoap] Problem in using gSOAP with Eclipse CDT v 6.0.0

[Jihed M'selmi]

Hello all of you, 

I am using gSOAP for creating a web service and I am programming the main class 
using Eclipse CDT v 6.0.0.
Does anyone know how to make the compiler use -lgsoap++ ?
Because, at every building program, the compiler doesn't recognize the gsoap 
functions.

Thanks for your time.
Best Regards

Jihed M'SELMI