Function compile 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn compile(
    model: *const c_char,
    ty: *const c_char,
    opt: u32,
    df: *const Defuns,
) -> *const CompilerResult

Compiles a model.

• model is a json string encoding the model.
• ty is the requested arch (amd, arm, native, or bytecode).
• opt: compilation options.
• df: user-defined functions.

Safety

* both model and ty are pointers to null-terminated strings.
* The output is a raw pointer to a CompilerResults.