libmodbus 提示configure: creating ./config.status .in'ig.status: error: cannot find input file: `

This error message is indicating that the `configure` script cannot find a required input file. The file it is looking for is named `config.in`, which is typically included with the libmodbus source code.

To resolve this issue, you should ensure that the `config.in` file is present in the same directory as the `configure` script. If it is not, you may need to download the source code again or obtain the missing file from another source.

Once the `config.in` file is present, you can re-run the `configure` script and it should be able to generate the necessary `config.status` file without errors.