Why do I get the error: "Error in ros.intern​al.utiliti​es.checkAn​dGetCompat​ibleCompil​ersLocatio​n (line 73)"?

Hi,

I'm trying to implement some ROS2 custom messages into Matlab and I've not found a solution yet.

I downloaded the following repo: https://github.com/ros2/common_interfaces.git

In order to recreate the errors:

• download the repo (I choose to clone it in the home);
• open Matlab and move to this folder;
• give the following command in the command window

ros2genmsg(".")

After this, I get these errors:

>> ros2genmsg(".")

Identifying message files in folder '/home/alberto/common_interfaces'..Validating message files in folder '/home/alberto/common_interfaces'..Done.

Done.

[0/11] Generating MATLAB interfaces for custom message packages... 0%Error using ()

Key not found.

Error in ros.internal.utilities.checkAndGetCompatibleCompilersLocation (line 73)

matlabInCompatibleCompilerVer = supportedCompilerVersions(matlabLIBSTDCXXVersionNum+1);

Error in ros.internal.ROSProjectBuilder (line 453)

[h.GccLocation, h.GppLocation] = ros.internal.utilities.checkAndGetCompatibleCompilersLocation();

Error in ros.ros2.internal.ColconBuilder (line 26)

[e-mail](varargin{:});

Error in ros2genmsg (line 278)

builder = ros.ros2.internal.ColconBuilder(genDir, pkgInfos{iPkg}, UseNinja=useNinja, SuppressOutput=suppressOutput);

I tried to recompile ROS packages and even to change compilers' version, but I can't find a way out.

I'm working on Ubuntu 22.04, the Matlab version that I'm using is:

MATLAB Version: 23.2.0.2599560 (R2023b) Update 8

Operating System: Linux 6.5.0-45-generic #45~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Jul 15 16:40:02 UTC 2 x86_64

Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

Following, I'm reporting versions of gcc, g++, Python, cmake and ROS:

• gcc (Ubuntu 10.5.0-1ubuntu1~22.04) 10.5.0
• g++ (Ubuntu 10.5.0-1ubuntu1~22.04) 10.5.0
• Python 3.10.12
• cmake 3.22.1
• ROS2 humble

Thanks for the help.

[Garmit Pant]

Hello Alberto

The error seems to be arrising when MATLAB is checking for compatible compliers' location. Specifically, the error is being triggered when MATLAB is extracting the maximum version of GLIBCXX_ symbols supported by MATLAB shipped libstdc++.so.6 library.

Please run the following lines of code in a script, live script or command window and please share the value of 'matlabLIBSTDCXXVersion' for further investigation:

matlabLIBSTDCXX = fullfile(matlabroot,'sys','os','glnxa64','libstdc++.so.6');
stringsCmd = ['strings ', matlabLIBSTDCXX, ' | grep LIBCXX_3 | sort -V | tail -1'];
[stringsCmdStatus, matlabLIBSTDCXXVersion] = system(stringsCmd);

[Josh Chen]

Hello Alberto,

Is there any log file or "build log" hyperlink showing up when you see this error message?

Thanks,

Josh

[Alberto Piccina]

Hi,

after running the requested lines of code, I obtained this:

>> matlabLIBSTDCXXVersion

matlabLIBSTDCXXVersion =

'strings: '/usr/local/MATLAB/R2023b/sys/os/glnxa64/libstdc++.so.6': No such file

'

Sorry, but there is not any log file, the only hyperlinks in these error are the functions 'ros.internal.utilities.checkAndGetCompatibleCompilersLocation', 'ros.internal.ROSProjectBuilder', 'ros.ros2.internal.ColconBuilder', 'ros2genmsg' and they refer to the documentation.

Answer 1

[Garmit Pant]

Hello Alberto

The error you are facing is due to missing libraries. Based on the investigation of the error and the output of the ‘matlabLIBSTDCXXVersion’ reflecting “No such file”, it is evident that the C++ standard library shipped with MATLAB is missing. The symbolic link ‘libstdc++.so.6’ is not present in the MATLAB installation folder on your system.

This can be resolved by re-installing MATLAB on your system, which will ensure that all the necessary libraries are installed.

Alternatively, you can install the ‘matlab-support’ package to configure MATLAB to integrate with the Linux distro. You can install this package by using the following command in the terminal:

sudo apt-get install matlab-support 

I hope you find the above explanation and suggestions useful!