Matlab -Dgdb doesn't work on Ubuntu

When trying to debug a mex file on Ubuntu 18.04 with Matlab 2018b, when I run

matlab -Dgdb

in the terminal, I get the following error:

gdb: symbol lookup error: /usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0: undefined symbol: XML_SetHashSalt

I've tried to reinstall libpython3.6m.so but the problem persists. The version of gdb is 8.1.0 and works fine when launched as standalone.

How can I fix it ?

Answer 1

[Ramkumar Natarajan]

I don't know if this is a perfect solution but doing this in the current environment before `matlab -Dgdb` resolves it for me.

export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libexpat.so 

[syl1446]

That works. Thanks

[Aep]

Hello,

Sorry I have a question. I am running a program and getting the same "undefined symbol: XML_SetHashSalt" error. I want to use the solution that you provided however I do not know where should I copy this export command that you mentioned?

I recieve the following error when I copy the export command in the MATLAB command line:

"Undefined function 'export' for input arguments of type 'char'."

Can you please help me with this error? I am using MATLAB in Ubuntu.

Thanks in advance

[Ramkumar Natarajan]

Running this command in the Linux shell (set as environment variable) and launch Matlab in commandline from the same shell.