Unity3D Unsafe code requires the `unsafe' command line option to be specified

Question

i am using Unity3D 4.3 and calling a DLL that i created. when trying to call the only function it have which is this:

void GetModelReferences(int &nVertices, float * vertices, int &nTriangles, int * triangles, float * normals, float * uvCoordinates);

unity gives me an error:

Unsafe code requires the `unsafe' command line option to be specified

so in my MonoDevelop i opened : Project->Assembly-Csharp options and turned on the unsafe mode.

it reduces part of the errors but this last one wont go away

Unsafe code requires the `unsafe' command line option to be specified

what shoud i do?

Cabal

Do you have more than one project? May be that you need to check that setting on more than one project. – Kauslick

Answer 1

Go to your project properties page and check under Build the checkbox Allow unsafe code. This should solve your problem.

Quito

the unsafe code is in the c# script that attached to an object in unity, what then? – Cabal

Is the unity project a C# project? If so, there is also a property page for this. If not, I simply not know, how unity is executing the script. – Quito

ok, i know i need to add the option\flag but i dont know how to get there – Cabal

In MonoDevelop: menu Project/Assembly-CSharp Options then Build/General/ Allow unsafe – Crinkly

Answer 2

Here is what worked for me with Unity3D 5.3:
- If in your Unity Build Setting->Player Setting->Other Settings, "API Compatibility Level" is ".Net 2.0", create a file under your Unity Asset folder called gmcs.rsp, add this following line to the file:
-unsafe
Close Unity and open it again.
- If the "API Compatibility Level" is ".Net 2.0 Subset", the above file name should be: smcs.rsp.

See the picture bellow to find the location of ""API Compatibility Level" setting in Unity.

Scutate

Answer 3

The answer is given here: https://mcmap.net/q/11034/unity-how-to-enable-unsafe-and-use-pointers

You need to add a file "smcs.rsp" (or "gmcs.rsp") in your "Assets" directory, which contains the line:

-unsafe

Undulate

This was the only usefull answer for me. Since I can not use .NET 2.0 Subset and my Unity Project Settings do not have the option to allow unsafe code. – Kym

when targeting the .NET 3.5 Equivalent (deprecated) scripting runtime version, mcs is used with mcs.rsp, and when targeting the .NET 4.x Eqivalent scripting runtime version compiler, csc is used with csc.rsp. – Foiled

Answer 4

Have you tried this ?

look at the fifth comment

Firstly show the contents of Unity.App and drill down to Contents/Frameworks/MonoCompiler.framework.

Open the file called compile_any.pl and in the section "# Run the csharp compiler" change @Base_Args options as below:

my @base_args=($mono_path, $mcs_path, '-debug', '-unsafe', '-target:library', '-nowarn:0169', '-out:'.$output, );

Decontaminate

i am running from a pc – Cabal

Miloš Selečéni, which version of Unity is this for? Mine has a Frameworks folder, but no MonoCompiler.framework. – Streaky

Answer 5

You can change the settings through the MonoDevelop: go to the solution files tree -> Solution -> your expand your solution -> Assempely-CSharp -> Right Click -> options -> Build -> General -> Language options -> enable "Allow 'unsafe' code"

Simulation

Answer 6

If you're in a unity project, open Project Settings>Other Settings>Allow Unsafe Code

Polymorphonuclear