Package Linux platform with Bing Sample

irvin · October 12, 2021, 2:27pm

I have packed Bing Sample to Linux platform with cross-compile, But I got the error

undefined symbol: ACesiumGeoreference::TransCartesianToCartographic(FVector, FRotator, FVector&)

I have compiled the third part on Linux with command
“cmake -B build -S . -DCMAKE_TOOLCHAIN_FILE=“unreal-linux-toolchain.cmake” -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_BUILD_TYPE=Debug
cmake --build build --target install”
before. And compiled success,but when I switch to windows and cross-compile the Bing Sample, I got this error .How to solve it？ Thanks!!

Kevin_Ring · October 13, 2021, 12:33am

Hi,

If you’re cross-compiling for Linux from Windows, you’ll probably have better luck using the cross-compiling toolchain file. Here’s how our CI system cross-compiles the Linux version of the plugin from a Windows system:

github.com

CesiumGS/cesium-unreal/blob/main/.travis.yml#L237

    
      
          - choco install python --version 3.9.2
          - choco install wget
          - choco install ninja
          - python -m pip install --upgrade pip
          - pip3 install --upgrade pip
          - pip3 install awscli
          - pip3 install httpie
          - travis_wait 30 "./travis/travis-get-ue-linux-crosscompile-toolchain-427.sh"
          - travis_wait 30 "./travis/travis-get-ue-427.sh"
          script:
          - export UNREAL_ENGINE_DIR=/c/Epic/UE_4.27
          - export LINUX_MULTIARCH_ROOT=/c/UnrealToolchains/v19_clang-11.0.1-centos7/
          - export UNREAL_ENGINE_COMPILER_DIR=${LINUX_MULTIARCH_ROOT}x86_64-unknown-linux-gnu
          - export UNREAL_ENGINE_LIBCXX_DIR=$UNREAL_ENGINE_DIR/Engine/Source/ThirdParty/Linux/LibCxx
          - export CESIUM_UNREAL_VERSION=$(git describe)
          - export BUILD_CESIUM_UNREAL_PACKAGE_NAME=CesiumForUnreal-427-linux-${CESIUM_UNREAL_VERSION}
          - mkdir -p extern/build
          - cd extern
          - cmake --version
          - cmake -G Ninja -B build -S . -DCMAKE_TOOLCHAIN_FILE="unreal-linux-from-windows-toolchain.cmake" -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_BUILD_TYPE=Release
          - cat /c/Users/travis/build/CesiumGS/cesium-unreal/extern/build/CMakeFiles/CMakeError.log

The -DCMAKE_TOOLCHAIN_FILE="unreal-linux-from-windows-toolchain.cmake" is the part that I think might be relevant.

Kevin

Kevin_Ring · October 13, 2021, 12:34am

Oh I just noticed that you’re building the Debug configuration, too. A Shipping or Development build will need the Release configuration of cesium-native.

irvin · October 13, 2021, 5:19am

thanks very much, I made a stupid mistake,I had packed the linux with cesium-unreal old version which is clone several months ago.
I got the newest version from the git ,and cmake -G Ninja -B build -S . -DCMAKE_TOOLCHAIN_FILE=“unreal-linux-from-windows-toolchain.cmake” -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_BUILD_TYPE=Release, then Sussces.
thanks again, Happy ending

lyong · March 27, 2022, 5:20am

cmake -G Ninja -B build -S . -DCMAKE_TOOLCHAIN_FILE=“unreal-linux-from-windows-toolchain.cmake” -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_BUILD_TYPE=Release， There was a compilation error and CLang was not found, but I did configure clang

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Package Linux platform with Bing Sample

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