Fedora 22 Build error

Development Programming & Scripting
1

Hi, I am trying to build the engine on Fedora 22 using the default mono that comes with fedora ver 4.0.3, which is compatible with .net version 4.5 and 4.5.1. And I am getting these errors:

CSC: error CS0518: The predefined type `System.Object' is not defined or imported
	CSC: error CS0518: The predefined type `System.ValueType' is not defined or imported
	CSC: error CS0518: The predefined type `System.Attribute' is not defined or imported
	CSC: error CS0518: The predefined type `System.Int32' is not defined or imported
	CSC: error CS0518: The predefined type `System.UInt32' is not defined or imported
	CSC: error CS0518: The predefined type `System.Int64' is not defined or imported
	CSC: error CS0518: The predefined type `System.UInt64' is not defined or imported
	CSC: error CS0518: The predefined type `System.Single' is not defined or imported
	CSC: error CS0518: The predefined type `System.Double' is not defined or imported
	CSC: error CS0518: The predefined type `System.Char' is not defined or imported
	CSC: error CS0518: The predefined type `System.Int16' is not defined or imported
	CSC: error CS0518: The predefined type `System.Decimal' is not defined or imported
	CSC: error CS0518: The predefined type `System.Boolean' is not defined or imported
	CSC: error CS0518: The predefined type `System.SByte' is not defined or imported
	CSC: error CS0518: The predefined type `System.Byte' is not defined or imported
	CSC: error CS0518: The predefined type `System.UInt16' is not defined or imported
	CSC: error CS0518: The predefined type `System.String' is not defined or imported
	CSC: error CS0518: The predefined type `System.Enum' is not defined or imported
	CSC: error CS0518: The predefined type `System.Delegate' is not defined or imported
	CSC: error CS0518: The predefined type `System.MulticastDelegate' is not defined or imported
	CSC: error CS0518: The predefined type `System.Void' is not defined or imported
	CSC: error CS0518: The predefined type `System.Array' is not defined or imported
	CSC: error CS0518: The predefined type `System.Type' is not defined or imported
	CSC: error CS0518: The predefined type `System.Collections.IEnumerator' is not defined or imported
	CSC: error CS0518: The predefined type `System.Collections.IEnumerable' is not defined or imported
	CSC: error CS0518: The predefined type `System.IDisposable' is not defined or imported
	CSC: error CS0518: The predefined type `System.IntPtr' is not defined or imported
	CSC: error CS0518: The predefined type `System.UIntPtr' is not defined or imported
	CSC: error CS0518: The predefined type `System.RuntimeFieldHandle' is not defined or imported
	CSC: error CS0518: The predefined type `System.RuntimeTypeHandle' is not defined or imported
	CSC: error CS0518: The predefined type `System.Exception' is not defined or imported

Any solution other than building mono 3 ?
Thanks in advance.

2

Hey Samir-

Are you following the steps to building the engine listed here: A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums? At what point in the build process did you encounter these errors?

Cheers

3

Hi Samir,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will offer further assistance.

Thank you.

4

Sorry for late reply,
I have fixed the problem in two steps:
1-in the terminal before I build the engine I exported the mono path using the command
export MONO_PATH=/usr/lib/mono/4.5
2-I changed the line "/p:TargetFrameworkVersion=v4.0 " in file “GenerateProjectFiles.sh” located in “Engine/Build/BatchFiles/Linux” to "/p:TargetFrameworkVersion=v4.5 "

that made the engine look and find the correct mono version in my system and use it.