In order to use the SAGA XCode project you have to point it to your 
Boost installation:

(1) Select saga_engine (root node) and hit "Apple+i". The info dialog should 
    come up.

(2) Select the "build" tab. MAKE SURE "All Configurations" is selected in the 
    "Configuration" drop-down list.
    
(3) Find and set the following variables in the "User-Defined" section:
  
    BOOST_FLAVOR
    BOOST_LOCATION
    BOOST_VERSION

NOTES: o the saga_default_adaptors project still expects to find a postgreSQL
         installation in /usr/local. Without it, advert and logical_file will 
         fail to build.

       o the saga_globus4-preWS_adaptors require a local Globus installation.
         the location can be set in the "User-Defined" section via:

         GLOBUS_LOCATION
         GLOBUS_FLAVOR