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Finding the name of a Module

I am building a plugin that lets you use Slate on a RenderTarget. After alot of trial and error I found out that "RHI" was one of the modules I needed.

Now I get this error when I try to extract the render resource.

 Error    1    error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl FRenderResource::UpdateRHI(void)" (__imp_?UpdateRHI@FRenderResource@@QEAAXXZ) referenced in function "public: __cdecl USerialConsole::USerialConsole(class FPostConstructInitializeProperties const &)" (??0USerialConsole@@QEAA@AEBVFPostConstructInitializeProperties@@@Z)    F:\PaulUser\Unreal Projects\ButtonScreen\Intermediate\ProjectFiles\SerialConsole.cpp.obj    ButtonScreen

A few others after this, but thats the main one. I am sure I will find out where this module is before somone replys. What I want to know however:

A. How does the build system create Module names? B. What tags do look for in the header files to know what objects go to those modules.

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asked Apr 06 '14 at 05:14 PM in C++ Programming

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For using Widgets and Slates, you need more modules than "RHI". One of them is "UMG", and there's one other I don't remember the name of. Did you figure it out?

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answered Oct 18 '18 at 02:49 AM

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avatar image WarlockD Oct 18 '18 at 04:00 AM

Yea but its been more than 4 years now, I am sure the way it works has changed

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usually if you want to use Slate you have to add Slate and SlateCore to your build.cs

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answered Oct 18 '18 at 03:12 AM

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I follow these steps to find all the engine modules required by a plugin

  • Compile your plugin code, when you get a link error, it means you are missing a module.

  • Inspect the link error to find the missing class. In your above example, it is FRenderResource::xxx

  • Open github and go to unreal engine source code and search for this class. From here I found that this code resides in this path: Engine/Source/Runtime/RenderCore/Public/RenderResource.h [alternatively jump to the symbol in visual studio using Alt+Shift+S if you are using VisualAssistX]

  • From this you know that the code is under the RenderCore module. If in doubt, go to that location and look for a Build.cs file and grab the module name from there

  • Compile again and repeat if you get more link errors for other missing modules

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answered Oct 18 '18 at 02:48 PM

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Ali Akbar
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