Illegal option --
spicy-build [options] <input files>

    -d          Build a debug version.
    -g          Disable HILTI-side optimizations of the generated code.
    -o <file>   Destination name for the compiled executable; default is "a.out".
    -t          Do not delete tmp files (useful for inspecting, and use with debugger)
    -v          Verbose output, display command lines executing.
    -S          Do not compile the "spicy-driver" host application into executable.

Input files may be anything that spicyc can compile to C++.