Compilation error with v2.15.0

Cesium for Unreal
1

Hi everyone,

I got this error while trying to compile the latest (v2.15.0) CesiumForUnreal plug-in.
I am on Windows AMD64 & UE 5.5
Any idea ?

   Creating object D:\XXXX\XXXXX\Plugins\CesiumForUnreal\Binaries\Win64\UnrealEditor-CesiumRuntime.exp
12>GooglePhotorealistic3dTilesLoad.perf.cpp.obj: Error LNK2019 : unresolved external symbol "public: static void __cdecl Cesium::GoogleTilesTestSetup::setupRefreshTilesets(struct Cesium::SceneGenerationContext &,class std::variant<int,float>)" (?setupRefreshTilesets@GoogleTilesTestSetup@Cesium@@SAXAEAUSceneGenerationContext@2@V?$variant@HM@std@@@Z) referenced in function "protected: virtual bool __cdecl FLoadTilesetGoogleChryslerWarm::RunTest(class FString const &)" (?RunTest@FLoadTilesetGoogleChryslerWarm@@MEAA_NAEBVFString@@@Z)
12>GooglePhotorealistic3dTilesLoad.perf.cpp.obj: Error LNK2019 : unresolved external symbol "public: static void __cdecl Cesium::GoogleTilesTestSetup::setupClearCache(struct Cesium::SceneGenerationContext &,class std::variant<int,float>)" (?setupClearCache@GoogleTilesTestSetup@Cesium@@SAXAEAUSceneGenerationContext@2@V?$variant@HM@std@@@Z) referenced in function "protected: virtual bool __cdecl FLoadTilesetGooglePompidou::RunTest(class FString const &)" (?RunTest@FLoadTilesetGooglePompidou@@MEAA_NAEBVFString@@@Z)
12>GooglePhotorealistic3dTilesLoad.perf.cpp.obj: Error LNK2019 : unresolved external symbol "public: static void __cdecl Cesium::GoogleTilesTestSetup::setupForPompidou(struct Cesium::SceneGenerationContext &)" (?setupForPompidou@GoogleTilesTestSetup@Cesium@@SAXAEAUSceneGenerationContext@2@@Z) referenced in function "protected: virtual bool __cdecl FLoadTilesetGooglePompidou::RunTest(class FString const &)" (?RunTest@FLoadTilesetGooglePompidou@@MEAA_NAEBVFString@@@Z)
12>GooglePhotorealistic3dTilesLoad.perf.cpp.obj: Error LNK2019 : unresolved external symbol "public: static void __cdecl Cesium::GoogleTilesTestSetup::setupForChrysler(struct Cesium::SceneGenerationContext &)" (?setupForChrysler@GoogleTilesTestSetup@Cesium@@SAXAEAUSceneGenerationContext@2@@Z) referenced in function "protected: virtual bool __cdecl FLoadTilesetGoogleChrysler::RunTest(class FString const &)" (?RunTest@FLoadTilesetGoogleChrysler@@MEAA_NAEBVFString@@@Z)
12>GooglePhotorealistic3dTilesLoad.perf.cpp.obj: Error LNK2019 : unresolved external symbol "public: static void __cdecl Cesium::GoogleTilesTestSetup::setupForGuggenheim(struct Cesium::SceneGenerationContext &)" (?setupForGuggenheim@GoogleTilesTestSetup@Cesium@@SAXAEAUSceneGenerationContext@2@@Z) referenced in function "protected: virtual bool __cdecl FLoadTilesetGoogleGuggenheim::RunTest(class FString const &)" (?RunTest@FLoadTilesetGoogleGuggenheim@@MEAA_NAEBVFString@@@Z)
12>GooglePhotorealistic3dTilesLoad.perf.cpp.obj: Error LNK2019 : unresolved external symbol "public: static void __cdecl Cesium::GoogleTilesTestSetup::setupForDeathValley(struct Cesium::SceneGenerationContext &)" (?setupForDeathValley@GoogleTilesTestSetup@Cesium@@SAXAEAUSceneGenerationContext@2@@Z) referenced in function "protected: virtual bool __cdecl FLoadTilesetGoogleDeathValley::RunTest(class FString const &)" (?RunTest@FLoadTilesetGoogleDeathValley@@MEAA_NAEBVFString@@@Z)
12>GooglePhotorealistic3dTilesLoad.perf.cpp.obj: Error LNK2019 : unresolved external symbol "public: static void __cdecl Cesium::GoogleTilesTestSetup::setupForTokyo(struct Cesium::SceneGenerationContext &)" (?setupForTokyo@GoogleTilesTestSetup@Cesium@@SAXAEAUSceneGenerationContext@2@@Z) referenced in function "protected: virtual bool __cdecl FLoadTilesetGoogleTokyo::RunTest(class FString const &)" (?RunTest@FLoadTilesetGoogleTokyo@@MEAA_NAEBVFString@@@Z)
12>GooglePhotorealistic3dTilesLoad.perf.cpp.obj: Error LNK2019 : unresolved external symbol "public: static void __cdecl Cesium::GoogleTilesTestSetup::setupForGoogleplex(struct Cesium::SceneGenerationContext &)" (?setupForGoogleplex@GoogleTilesTestSetup@Cesium@@SAXAEAUSceneGenerationContext@2@@Z) referenced in function "protected: virtual bool __cdecl FLoadTilesetGoogleGoogleplex::RunTest(class FString const &)" (?RunTest@FLoadTilesetGoogleGoogleplex@@MEAA_NAEBVFString@@@Z)
12>TileLoadingSoakTest.cpp.obj: Error LNK2001 : unresolved external symbol "public: static void __cdecl Cesium::GoogleTilesTestSetup::setupForGoogleplex(struct Cesium::SceneGenerationContext &)" (?setupForGoogleplex@GoogleTilesTestSetup@Cesium@@SAXAEAUSceneGenerationContext@2@@Z)
12>UnrealEditor-CesiumRuntime.dll: Error LNK1120 : 8 unresolved externals
2

Hi @byjtew,

Those functions are defined in this source file:

I’m not sure why they wouldn’t be found by the linker on your system. Perhaps you need to regenerate the Visual Studio solution?

3

Hi,
It seems the issue was due to the inline keyword in the .cpp file, removing it fixed the issue.

FYI for future CI: Using Visual Studio 2022 14.43.34808 toolchain (C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.43.34808) and Windows 10.0.22621.0 SDK (C:\Program Files (x86)\Windows Kits\10).

1 Like
4

Hi @byjtew,

Thank you for finding a fix and posting your solution! We’d welcome a community contribution for this fix if you’re able! :smiley:

1 Like
5

I searched every single possible solution regarding Cesium Linking error and this was the only thing that worked for me, thank you.

1 Like
6

@janine @Kevin_Ring
Possible to release a hot-fix release soon ?
Seems like more people are getting blocked on this release

7

This was fixed in Cesium for Unreal v2.16.0, which we released yesterday. Let us know if you still run into problems.