Initial CMake Error at 91% linking CXX executable [Raspberry Pi 3]

Hi all.

I’m trying to make a 3D racing game for a fourth year project on the rpi 3.
I’m after running into a problem when doing the initial cmake to make the build for the engine.

[ 91%] Linking CXX executable …/…/…/bin/tool/AssetImporter
/usr/bin/ld: …/…/ThirdParty/Assimp/code/libAssimp.a(IFCLoader.cpp.o): in function Assimp::IFCImporter::InternReadFile(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, aiScene*, Assimp::IOSystem*)': IFCLoader.cpp:(.text+0x7068): undefined reference to Assimp::IFC::GetSchema(Assimp::STEP::EXPRESS::ConversionSchema&)’
collect2: error: ld returned 1 exit status
make[2]: *** [Source/Tools/AssetImporter/CMakeFiles/AssetImporter.dir/build.make:88: bin/tool/AssetImporter] Error 1
make[1]: *** [CMakeFiles/Makefile2:1639: Source/Tools/AssetImporter/CMakeFiles/AssetImporter.dir/all] Error 2
make: *** [Makefile:152: all] Error 2

I’m not sure if its a missing dependency or if its because I’m a total noob when it comes to linux and rpi’s or both.

Any help is greatly appreciated

If You are trying to develop it on the RPI as well then you’ll need ASSIMP. Otherwise, you might as well disable the asset importer and just keep engine itself.

Hi S.L.C thanks for the reply

is there an apt-get install command call for it or do i need to download and make the library itself?

This error happens to me too, on my RPI2, I “fixed” it by disabling just the IFC Importer. You can modify this file : Urho3dBaseDir/Source/ThirdParty/Assimp/CMakeLists.txt
At about line 56ish, add the code

if (RPI)
ADD_DEFINITIONS( -DASSIMP_BUILD_NO_IFC_IMPORTER )
endif()

Then rerun the ‘cmake_rpi.sh …’ command again to push out new makefiles, then run the ‘make’ command, and it should be able to complete. Or start a new build, simpler, but slower.

Are you guys using Raspbian or other distro? What is the version of your GCC? I would be interested to know why it failed for your case too, especially if it is reproducible. Our CI uses the cross-compiler GCC version 4.8.3 from here, rather old but it still gets the job done[?] with the default build options including assimp. I know I am not solving your issue by stating this. Perhaps we should upgrade our CI compiler toolchain. And, perhaps it will then see the same issue[?] Anyone know where a new cross-compiling toolchain for RPI can be found?