Actually, what's in the title isn't the error message. According to man perldiag, the error message is Permission denied. What you mention in the title is the explaination from perldiag. I guess you are running with use diagnostics;?

but even after manually running it, the problem still occurs.

Do you run it as root or a normal user? When do you get the error message, compile time? Program start? Runtime?

As for the -Ddo_suid, you shouldn't need it on Linux.

Abigail