Bjam command line -s option

From: TEMPLIE Cédric (cedric.templie_at_[hidden])
Date: 2005-04-01 05:17:54

Hello,

I need to use the -s option of bjam to set a variable, but I did not 
succeed, maybe I do something wrong...
I tried that: bjam -sCUSTOMER=MyCustomer
In my project-root.jam I do the following:
if ! $(CUSTOMER)
{
CUSTOMER = DefaultCustomer ;
}

Of course i print $(CUSTOMER) just after but the value is always 
DefaultCustomer....
I do not know how to retrieve the value.
I will be very glad if someone can help me.

Thanks in advance.

TEMPLIE Cédric