What is not working ? Is it "make all_sdk_install" ?
If it is the case, please try to do a "make build_sdk_install".
That is will install everything but gtest, uncrustify, doxygen.
You can always install those manually should you need them by running "make install_<tool>".
If this is not the issue then please report back and i'll take a look tomorrow.
PS : osg is not required atm to build GCS...