Creating 'LD_LIBRARY_PATH' for MATLAB runtime conflicts with QT

Question

Atin 2023-3-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1931905-creating-ld_library_path-for-matlab-runtime-conflicts-with-qt

回答： Vinayak Gupta 2023-4-6

Hi,

I created 'LD_LIBRARY_PATH' environment variable, by adding an export statament in .bashrc, for my MATLAB exectuable file to run properly.

atinxx@xxx:~$ echo $LD_LIBRARY_PATH
/usr/local/MATLAB/MATLAB_Runtime/R2023a/runtime/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/R2023a/bin/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/R2023a/sys/os/glnxa64:/usr/local/MATLAB/MATLAB_Runtime/R2023a/extern/bin/glnxa64

However, this variable is causing some conflict with another pllication and giving following error -

QFactoryLoader::QFactoryLoader() checking directory path "/usr/bin/platforms" ...
qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Although, this warning was given in MATLAB's documentation - 'Set MATLAB Runtime Path for Deployment', now I am tring to find a solution for this.

I am using Debian 10.

In a nutshell,

I have an executable file
Installed MATLAB Runtime for executing the file
Created 'LD_LIBRARY_PATH' environment variable, which was not present earlier
Now, it conflicts with another application giving an error
Deleting 'LD_LIBRARY_PATH' environment variable, makes the other application work perfectly
But now I cannot execute the MATLAB executable file!

It would be great if anyone can help!

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Atin 2023-3-22

Is there any way to run it without MATLAB Runtime in order to avoid this conflict? I have MATLAB already installed on my linux machine

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Answer 1

Vinayak Gupta 2023-4-6

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1931905-creating-ld_library_path-for-matlab-runtime-conflicts-with-qt#answer_1210279

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Hi Atin

It is currently not possible to run a standalone application within MATLAB as they are designed to be shared and run without the MATLAB installation.

It seems like you might be overwriting the 'LD_LIBRARY_PATH' variable instead of appending to it. Instead try appending to it using:

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/MATLAB/MATLAB_Runtime/R2023a/runtime/glnxa64

Even if it still conflicts with other application, you might need to write a small script with temporary sets the variable before execution of the MATLAB executable.