Building Chrono failed

[ychen_441]

Lovely colleagues,

I was recently setting up gym_chrono on my VMware-based Ubuntu 20.04. According to the documentation, I have downloaded realted packages and configured required modules (on https://github.com/projectchrono/gym-chrono).

However, errors occured during Chrono building process, and I thought that might be something due to SWIG. However, I checked my SWIG version, it is installed and updated by conda, and therefore I have no idea what is going on now. Hope somebody will have some advice on this situation. Appreciates.

I have attached my configuration (logs.txt) and errors (.txt).

Again, appreciates for your help.

Chen

[Salman Husain]

Hi Chen,

Did you ever resolve this issue?  I have SWIG 4.2.0 and seeing similar errors when building on Ubuntu 24.04.  Some screenshots are attached to compare notes.

The project builds properly when the python module isn't checked.

[Radu Serban]

Sal, I don’t have a ROS installation available to test this, but could you please try to modify the file src/chrono_swig/interface/ros/ChModuleROS.i by adding the following (at line 184):

 

%import(module = "pychrono.core")  "chrono_swig/interface/core/ChClassFactory.i"

%import(module = "pychrono.core")  "chrono_swig/interface/core/ChSystem.i"

%import(module = "pychrono.core")  "chrono_swig/interface/core/ChBody.i"

%import(module = "pychrono.core")  "chrono_swig/interface/core/ChFrame.i"

%import(module = "pychrono.core")  "chrono_swig/interface/core/ChBodyFrame.i"

%import(module = "pychrono.core")  "chrono_swig/interface/core/ChContactMaterial.i"

 

then reconfigure and rebuild?

 

--Radu

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[Salman Husain]

Hi Radu,

I am sorry for the late response.

This is a good news/bad news scenario.

First the bad news:

Thanks for your fix. I tried that, but then started seeing errors related to other pychrono examples. I pulled the project again and apart from the ChModuleRos.i file there were no other diffs.

So I couldn't fix it that way. I tried it on a different Linux machine, and couldn't replicate the error.

Good news:

I cleaned up everything. Fresh installed everything, and viola everything works!

I am so sorry I couldn't get to the root of the cause of the issue..  but rinse/repeat seemed to have worked yet again.

Cheers,

sal