Previously, -noprelude meant that we are not loading libprelude
    as well as libsac, libphm, etc.  Therefore, the only usecase for
    the flag was to compiler the prelude.  In case one was using
    -noprelude with a regular sac program, the lack of libsac (and other
    libraries) made the compilation process to fail.

    The -nosaclibs means that we are not loading libsac, phm, etc.
    Therefore, when we are compiling prelude, we use -noprelude
    -nosaclibs.  If we want to compile a sac program without the prelude
    functions, we can use -noprelude, and the compilation succeeds.