It seems like you are encountering a conflict with the `rt_roundd` function in your MATLAB code generation for the Autosar platform. The issue you described occurs because the function is declared as `extern` in one place and defined in the same file. This can cause a redefinition error during the linking phase of compilation.
To resolve this issue, you can try the following steps:
- Check MATLAB Code Generation Options: In MATLAB, go to the "Code Generation" settings and ensure that the "Code interface packaging" option is set to "Nonreusable function." This should prevent the generation of the `rt_roundd` function as an `extern` in the generated code.
- Avoid Using Built-in Functions: If you have any custom code that uses the `rt_roundd` function, consider renaming that function to avoid conflicts with the built-in `rt_roundd` function in the generated code.
- Rename Conflicting Function: If you don't have control over the MATLAB-generated code, you can rename the conflicting `rt_roundd` function in your C code manually. For example, you can rename it to something like `my_rt_roundd` in both the function declaration and the function definition.
- Separate Declaration and Definition: If the function definition is provided separately from the declaration in the generated C code, you can modify the code to keep the declaration `extern` and place the function definition in a separate source file. This way, you won't have a redefinition conflict.
- Check for Code Generation Issues: Ensure that your MATLAB code is written correctly and doesn't contain any issues that might lead to conflicts in the generated C code.
