Building PSUnreal on macOS

Reference docs

• Downloading Unreal Engine source code: https://docs.unrealengine.com/en-US/GettingStarted/DownloadingUnrealEngine/index.html
• Compiling Unreal Engine source code: https://github.com/EpicGames/UnrealEngine/blob/release/README.md

Compiling Unreal Engine

Note: As of 2020-05-05, you need ~120GB of disk space for a compiled version of the Unreal Engine.

• Step 1: Get access to the Unreal Engine source code.
  • You must be an Unreal Engine subscriber (if not, open an account there: https://www.unrealengine.com)
  • You must have a GitHub account (if not, open an account there: https://github.com)
  • Have associated your GitHub account with your Unreal Engine account as described on the UE4 on GitHub page.
  • At this point you should be able to access the Unreal Engine repository on GitHub.

• Step 2: Get the Unreal Engine source code.
  • Get the source code with: git clone -b 4.24.3-release https://github.com/EpicGames/UnrealEngine.git.
  • This will create an "Unreal Engine" sub-directory where you run the command.

• Step 3: Install the latest version of Xcode.
  • Install the latest version of Xcode.

• Step 4: Prepare the Xcode workspace.
  • In the UnrealEngine directory, run the script Setup.command. It downloads 11.5GB of dependencies and may take a while.
  • At the same location, run the script GenerateProjectFiles.command. It generates the UE4.xcworkspace Xcode workspace.

• Step 5: Compile Unreal Engine with Xcode.
  • Load the UE4.xcworkspace into Xcode.
  • Select the ShaderCompileWorker > My Mac target in the title bar, then build with Product > Build menu item.
  • Wait for the build to complete.
  • Select the UE4 > My Mac target, and build again.
  • Compiling may take a long time, depending on your system specs.
  • After the compilation finishes, select the 'Product > Run' menu item to load the editor.

• Step 6: set xcode tools
  • Open Xcode and go to Preferences>Locations and set the Command Line Tools or Unreal will give this error: "Xcode is not installed on this Mac ... Falling back to runtime text shaders, which are slower. "

• Launch the Editor to test if it works
  • You can launch the editor with \UnrealEngine\Engine\Binaries\Mac\UE4Editor.app

If you get this error:

 xcode command codesign failed with exit code 1 

You need to access the project settings and set the code signing.

Building PSUnreal

• Create PSUnreal dir

 > cd \
 > mkdir PSUnreal

• Install macports and svn command line
  • Install macports: Download https://distfiles.macports.org/MacPorts/MacPorts-2.6.2-10.15-Catalina.pkg

 > sudo port install subversion

Get the sources from the Planeshift repository.

• Open a Terminal and go to you home directory with

 > cd ~. We will build from there; adapt if needed.

• Checkout the sources from the PS Unreal repository with:

 > svn co svn://xxx.xxx.xxx/psunreal/PSUnreal PSUnreal

• Build the MariaDB Connector from source.
  • Install prerequisites: sudo port install cmake jemalloc judy openssl boost gnutls
  • Download the MariaDB Connector for C from https://downloads.mariadb.com/Connectors/c/connector-c-3.1.8/mariadb-connector-c-3.1.8-src.tar.gz.
  • Expand the tar.gz in your home directory. From your terminal, cd ~/mariadb-connector-c-3.1.8-src, to go to the directory that contain the MariaDB Connector sources.
  • move the sources in PSUnreal: mv * /Users/luke/PSUnreal/ThirdParty/MariaDB
  • Generate the makefiles with cmake . .
  • Build and install the connector in your PSUnreal source tree with make all install.

• Build Wordnet

 > cd /Users/luke/PSUnreal/ThirdParty/Wordnet
 > gcc -shared -o Wordnet.dylib -fPIC *.c

Build PS Unreal.

• Generate project files:

 > /Users/luke/UnrealEngine/GenerateProjectFiles.command -project="/Users/luke/PSUnreal/PSUnreal.uproject" -game -engine

• Launch XCode and open PSUnreal.xcworkspace
• Build with Product > Build menu item.