问使用clang的JIT注册外部函数？

EN

extern "C"
int myFunction(int val)
{
 fprintf(stderr, "success!");

 return 1;
}

llvm::FunctionType* ft = llvm::FunctionType::get(llvm::Type::getInt32Ty(llvm::getGlobalContext()),
  std::vector<const llvm::Type*>(1, llvm::Type::getInt32Ty(llvm::getGlobalContext())), false);

llvm::Function* F = llvm::Function::Create(ft, llvm::Function::ExternalLinkage, "yipee", Mod);
EE->addGlobalMapping(F, (void*)(intptr_t)yipee);

int myFunction(int);
int main()
{
   int dd = myFunction(5);

    return 0;
}