Add code to the engine and compile the engine

anonymous_user_89df86541 · October 21, 2015, 6:28am

I downloaded the source code from git, setted up the project in Xcode, and everything was working well.

I then added a new renderer class in the engine source

class FCustomShadingSceneRenderer : public FSceneRenderer

which is a copy of

class FDeferredShadingSceneRenderer : public FSceneRenderer

When I created the .h and .cpp files for my class it asked for which target it was, I clicked on UE4Editor - Mac, UE4Game - Mac and UE4XcodeHelper

Then I did Product → Build

Compile failed, here is the output of the external build tool

ExternalBuildToolExecution UE4Editor\ -\ Mac
    cd /Users//projects/UnrealEngine
    export ACTION=
    /Users//projects/UnrealEngine/Engine/Build/BatchFiles/Mac/Build.sh UE4Editor macosx Debug

Setting up Mono
Building UBT...
	 0 Error(s)
Building UE4Editor...
2015-10-21 13:58:02.999 defaults[22529:1077964] 
The domain/default pair of (/Users//Library/Preferences/com.apple.dt.Xcode, IDEBuildOperationMaxNumberOfConcurrentCompileTasks) does not exist
Running command : Engine/Binaries/DotNET/UnrealBuildTool.exe UE4Editor Mac Debug 
Creating makefile for UE4Editor (project files are newer)
Performing full C++ include scan (no include cache file)
Compiling with MacOSX SDK 10.10
Performing 189 actions (4 in parallel)
[3/189] Compile Module.Renderer.4_of_8.cpp
[1/189] Link UE4Editor-Engine-Mac-Debug.dylib
[2/189] Compile Module.Renderer.1_of_8.cpp
[4/189] Compile Module.Renderer.8_of_8.cpp
Undefined symbols for architecture x86_64:
  "operator<<(FArchive&, FSceneTextureShaderParameters&)", referenced from:
      FDownsampleSceneDepthPS::Serialize(FArchive&) in Module.Engine.6_of_30.cpp.o
      FDownsampleSceneDepthPS::Serialize(FArchive&) in Module.Engine.11_of_30.cpp.o
      FDownsampleSceneDepthPS::Serialize(FArchive&) in Module.Engine.14_of_30.cpp.o
      FDownsampleSceneDepthPS::Serialize(FArchive&) in Module.Engine.19_of_30.cpp.o
      FDownsampleSceneDepthPS::Serialize(FArchive&) in Module.Engine.22_of_30.cpp.o
  "FSceneTextureShaderParameters::Bind(FShaderParameterMap const&)", referenced from:
      FDownsampleSceneDepthPS::FDownsampleSceneDepthPS(FShader::CompiledShaderInitializerType const&) in Module.Engine.6_of_30.cpp.o
      FDownsampleSceneDepthPS::FDownsampleSceneDepthPS(FShader::CompiledShaderInitializerType const&) in Module.Engine.11_of_30.cpp.o
      FDownsampleSceneDepthPS::FDownsampleSceneDepthPS(FShader::CompiledShaderInitializerType const&) in Module.Engine.14_of_30.cpp.o
      FDownsampleSceneDepthPS::FDownsampleSceneDepthPS(FShader::CompiledShaderInitializerType const&) in Module.Engine.19_of_30.cpp.o
      FDownsampleSceneDepthPS::FDownsampleSceneDepthPS(FShader::CompiledShaderInitializerType const&) in Module.Engine.22_of_30.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/install_name_tool: can't open file: /Users//projects/UnrealEngine/Engine/Binaries/Mac/UE4Editor-Mac-Debug.app/Contents/MacOS/UE4Editor-Engine-Mac-Debug.dylib (No such file or directory)
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/install_name_tool: can't open file: /Users//projects/UnrealEngine/Engine/Binaries/Mac/UE4Editor-Mac-Debug.app/Contents/MacOS/UE4Editor-Engine-Mac-Debug.dylib (No such file or directory)
[5/189] Compile Module.Renderer.7_of_8.cpp
[6/189] Compile Module.Renderer.5_of_8.cpp
[7/189] Compile Module.Renderer.3_of_8.cpp
[8/189] Compile Module.Renderer.2_of_8.cpp
[9/189] Compile Module.Renderer.6_of_8.cpp
-------- End Detailed Actions Stats -----------------------------------------------------------
ERROR: UBT ERROR: Failed to produce item: /Users//projects/UnrealEngine/Engine/Binaries/Mac/UE4Editor-Mac-Debug.app/Contents/MacOS/UE4Editor-Engine-Mac-Debug.dylib
Total build time: 262.04 seconds

And here is the output message from Xcode

At first I had compile errors because I copy pasted the code, and some functions were being defined twice in the cpp code. I then put some of these functions in the .h, renamed other functions, and the errors weren’t showing up anymore.

Now I get this new error and I don’t know how to deal with it. Can someone help me please?

error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/install_name_tool: can't open file: /Users//projects/UnrealEngine/Engine/Binaries/Mac/UE4Editor-Mac-Debug.app/Contents/MacOS/UE4Editor-Engine-Mac-Debug.dylib (No such file or directory)

anonymous_user_9b74c645 · October 22, 2015, 6:54am

“/Users//projects/UnrealEngine/Engine/Binaries/Mac/UE4Editor-Mac-Debug.app/Contents/MacOS/” Go here then see if you can find a file named “UE4Editor-Engine-Mac-Debug.dylib”. It may be a hidden folder. Open it up using “Wordpad” and report what is there.

anonymous_user_9b74c645 · October 22, 2015, 7:30am

I knew it would not be there, and this is why there is compile errors.
So the recompiled data is using this file to compile now there is no explanation I can give you about this, but you may be able to look if other scrips are able to compile. All we did was look for what the computer could not find. Your script contains something that is not a compiled component. It is usually caused by trying to send something that has been imported or a overload that is linking to a location that douse not exist. It can be from having too many functions or other unknown things like implementations(That I do not see being very likely.)(This was a problem I had with Arduino). From there give this problem to some one else because the reality game is that I really do not know with such a poor understanding of UE4.

anonymous_user_89df86541 · October 22, 2015, 7:08am

Hi,

The file doesn’t exist, here is a screenshot of the files I do have

anonymous_user_89df86541 · January 27, 2016, 3:45am

I retried it. I created a class with a static function, i’m including the .h file in SceneRendering.cpp, im compiling. It fails.

It means my new scripts, named CustomFracturesRenderer.h and CustomFracturesRenderer.cpp are not known by the compiling tool. I added them in the xcode solution right clicking on the folder I wanted to add it to, then clicking on new file. What should i do to make the engine know my files at compile time?

anonymous_user_89df86541 · March 7, 2016, 2:25am

After a while I started from zero again and after created a new class I ran GenerateProjectFiles.command again so that the project knows about my new class. It worked.