jmc-elodie
commented
3 years ago Ok I was able to figure this out, I am going to do a write-up but here is the TLDR:
- Compile OpenSSL 1.1.1 from source for Android arm64 and move the includes/libs into Engine/Source/Thirdparty/OpenSSL/1.1.1
- Compile gRPC against that OpenSSL and your project's NDK
- Compile libcurl 7.65.3 from source for Android arm64 using that OpenSSL
- Update libcurl.Build.cs to use your new libcurl and link against OpenSSL properly (basically just copy the profile from Linux)
I have some sketchy batch scripts to do this currently, but I think it might be worth making a cmake project that does all this? Would that be something you think should be a part of InfraworldRuntime?
MosheBitan78
Hey guys,
EDIT: more clearly articulate the problems I am seeing I am trying to compile for Android and am having linking problems that seem to stem from not having a good OpenSSL dependency available in Unreal on Android. It looks like the Http library that unreal uses on Android specifically statically links in its own version of OpenSSL to get around this. The problem is that these symbols pollute the namespace so if I try to do the same thing with gRPC I get duplicate symbol errors.
I tried linking directly against libcurl in my unreal build thus letting my use the statically linked OpenSSL dependency there but the problem I encountered was that they use an older version of OpenSSL than grpc supports (1.0.1s vs 1.1.1).
I ask this here because I feel like this is a problem that users of InfraworldRuntime may have uniquely encountered