How to intercept "Illegal instruction" error.

[fbafkis]

Hi,

I need help. I am using sysbench in my master thesis project. Within this project it often happens that I have to run Sysbench on relatively old machines. Using the precompiled version of Sysbench from the Alpine Linux repositories sometimes I get the "Illegal instruction" fatal error, because of the usage of unsupported instruction sets. Now, what I need to achieve is to intercept inside a shell script the "Illegal instruction" error case, so that I can ask to the user if he wants to perform Sysbench compilation and configuration from source. But I am not able to do this, since in that case Sysbench exits with code 0, and it seems not possible to intercept the "Illegal instruction" message from output, I think (may I be wrong?) it is because it is not Sysbench itself generating that error message. So I want to ask if there is an alternative way to be aware of a Sysbench "Illegal instruction" event, so that I can handle that.

Thank you a lot in advance for any advice!