Unreal + ROS? "cannot use typeid with -fno-rtti"

[anonymous_user_e5f624c2]

Hi all,

I’m trying to use [ROS][1] with Unreal, but there is no way to make it works.

First, after insert the #include "ros/ros.h" on my Source/MyProj/MyProjPawn.cpp, I had problems because the compiler didn’t find the ros.h file.

So, I added the /opt/ros/kinetic/include/ path to my Source/MyProj/MyProj.Build.cs using the code below:

PublicIncludePaths.AddRange( new string[] { "/opt/ros/kinetic/include/" } );

after that, when compiling the project, the compiler can find the ros.h file, but I have a lot of compiling errors and one of them is cannot use typeid with -fno-rtti.

The list of errors are:

Error 1 - /opt/ros/kinetic/include/ros/publisher.h:85:22: error: cannot use typeid with -fno-rtti

Error 2 - /opt/ros/kinetic/include/ros/service_client.h:108:5: error: cannot use 'try' with exceptions disabled

Error 3 - /opt/ros/kinetic/include/ros/master.h:80:18: error: expected unqualified-id

Anyone of you got through these problems? Do you know how to solve at least 1 of these 3 problems?
I’m asking here because I already spent a whole week trying to make this simple #include "ros/ros.h" works but I wasn’t able to do it.

Thanks in advance for the answers.

[anonymous_user_e792ca45]

First, Take a look at the UE4Duino project. It was showcased some time ago. Also, it may be a better idea to think of using something like that project to pipe the data you may wnt to be manipulating into unreal for you.

[anonymous_user_e5f624c2]

Hi @cpyarger , I’ve downloaded the code of UE4Duino project and analysed it, but it didn’t help.

Anyway, thank you for your answer.

[RCL (Arciel Rekman)]

You can enable RTTI in the Target.cs file of your project, by adding

	UEBuildConfiguration.bUseRTTI = true;

to SetupGlobalEnvironment().

[anonymous_user_e5f624c2]

The errors happened to me with Unreal 4.14.x
Adding bUseRTTI didn’t solve the problem.

The two first errors (-fno-rtti, try) only disappeared after upgrade to Unreal 4.17.2.