How to compile for Linux using Unreal Engine 4.27
Hello, this was working in previous versions of Unreal and Photon SDKs, now, with Photon SDK 4 and 5 and Unreal 4.27 + linux crosscompiler 11 the compilation throws a lot of errors for undefineds:
Am I missing some flag to be added in the compiler arguments or am I using the wrong libs? , I have updated every lib but it didn't work.
Thanks!
Comments
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Hi @juaxix.
The Photon Linux client SDK uses g++ as compiler and libstdc++ and standard library, while Unreal Linux builds use clang as compiler and libc++ as standard library.
So I would assume that it should not have worked on previous versions either.
You can switch Unreal to libstdc++ by setting an environment variable UE4_LINUX_USE_LIBCXX to 0 and see if that helps.
If that doesn't help, then I am afraid that that would mean that Photon currently does not support Unreal Linux builds
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I tried with this:
PublicDefinitions.Add("UE4_LINUX_USE_LIBCXX=0");resulting in the same errors:
2>ld.lld : error : undefined symbol: std::ios_base::Init::Init() 2> >>> referenced by JString.cpp 2> >>> JString.o:(_GLOBAL__sub_I_JString.cpp) in archive Z:/PC/PhotonCloudAPI_UE4/PhotonVoiceIntegration/Plugins/PhotonCloudAPI/Source/ThirdParty/Photon/lib/Linux/libCommonRelease64.a 2> >>> referenced by Logger.cpp 2> >>> Logger.o:(_GLOBAL__sub_I_Logger.cpp) in archive Z:/PC/PhotonCloudAPI_UE4/PhotonVoiceIntegration/Plugins/PhotonCloudAPI/Source/ThirdParty/Photon/lib/Linux/libCommonRelease64.a 2> >>> referenced by LogFormatOptions.cpp 2> >>> LogFormatOptions.o:(_GLOBAL__sub_I_LogFormatOptions.cpp) in archive Z:/PC/PhotonCloudAPI_UE4/PhotonVoiceIntegration/Plugins/PhotonCloudAPI/Source/ThirdParty/Photon/lib/Linux/libCommonRelease64.a 2> >>> referenced 96 more times
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