I want to use c++ code in c# for unity using CLR.
The program works properly outside of unity, but inside of engine it gives me an error:
"cs0227: unsafe code requires the 'unsafe' command line option to be specified"
I am really confused, because the project builds successfully in visual studio (without any errors or warnings). I have "allow unsafe" button activated.
using UnityEngine; using System.Collections; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; public class newspawn_real : MonoBehaviour { void Start () { unsafe { fixed (int * p = &bam[0, 0, 0]) { CppWrapper.CppWrapperClass controlCpp = new CppWrapper.CppWrapperClass(); controlCpp.allocate_both(); controlCpp.fill_both(); controlCpp.fill_wrapper(); }
You have to explicitly enable unsafe code in Unity. You can follow the steps below:
1. First step, Change Api Compatibility Level to .NET 2.0 Subset.
2. Create a file in your <Project Path>/Assets directory and name it smcs.rsp then put -unsafe inside that file. Save and close that file.
Close and reopen Visual Studio and Unity. You must re-start both of them.
It's worth noting that even after doing this and re-starting both Unity and Visual Studio but the problem is still there, rename the smcs.rsp file to csc.rsp, or gmcs.rsp and re-start each time until you get one that works. Although, smcs.rsp should do it the first time.
Simple C# unsafe code that compiles after this.
public class newspawn_real : MonoBehaviour { unsafe static void SquarePtrParam(int* p) { *p *= *p; } void Start() { unsafe { int i = 5; // Unsafe method: uses address-of operator (&): SquarePtrParam(&i); Debug.Log(i); } } }
EDIT:
For the latest Unity version, the file name should be mcs.rsp. Everything else remains the-same.
