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.