Desired environment variables and versions for the SConstruct:
set GCCDIR=/home/utils/gcc-7.3.0 set SCONSDIR=/home/utils/scons-2.3.0 set GDBDIR=/home/utils/gdb-7.12.1 set GPROFDIR=/home/utils/binutils-2.30/ setenv BOOSTDIR /home/utils/boost-1.65.1/gcc-7.3.0 setenv PYTHON /home/utils/Python-3.6.1/bin/python3