Function LLVMOrcAddLazilyCompiledIR 

pub unsafe extern "C" fn LLVMOrcAddLazilyCompiledIR(
    JITStack: LLVMOrcJITStackRef,
    RetHandle: *mut LLVMOrcModuleHandle,
    Mod: LLVMModuleRef,
    SymbolResolver: LLVMOrcSymbolResolverFn,
    SymbolResolverCtx: *mut c_void,
) -> LLVMErrorRef

Add a module to be lazily compiled one function at a time.