Program runs on 32-bit machine from LinuxLazrus IDE, but not on 64-bit
Machine
lazarus / 32-Linux

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Curt Carpenter · 2022-08-07 21:14

I have a Lazarus program running under Ubuntu 18.03 on both a 32-bit
and a 64-bit machine.  On the 32-bit machine, I can execute
"MyProgram" using "run" directly from the IDE in user mode.  On the
64-bit machine though, I can only run the program by opening a
terminal, making my self root and then executing "./MyProgram" .  Can
anyone tell me what I need to do to make my program run directly from
the Lazarus IDE on the 64-bit box? 

My source compiles correctly on both machines, and runs correctly on
both. It just requires me to be root on the 64-bit box.  It uses the
libusb library {$linklib usb} which presents no problems on the 32-bit
machine and the Lazarus IDE, but my USB instructions all fail on the
64-bit box.

Any help appreciated.  I would like to be able to run the program as a
normal user on both machines.  I figure there is a project option or
Linux option that is preventing this.

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dje · 2022-08-08 03:42

libusb permission issue?

https://askubuntu.com/questions/978552/how-do-i-make-libusb-work-as-
non-root

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MarkMLl · 2022-08-08 07:26

Alternatively, a permission issue on the specific device on the 64-bit
machine, i.e. the 32-bit machine has a udev rule for it while the
64-bit one doesn't.

In the absence of error messages, kernel log entries etc. it's
impossible to say more.

MarkMLl

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Curt Carpenter · 2022-08-09 19:10

Thank you both for the inputs.  I have the same udev rule for my
hardware installed on both machines, and both by 32- and 64-bit
machines are able to communicate with the hardware -- just that the
64-bit machine requires that my software be run in root, while the
32-bit lets me run as a normal user. 

I will check out the link to the Ubuntu thread.

Both replies much appreciated -- thanks again.

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MarkMLl · 2022-08-09 19:51

As a temporary hack, it might be worth investigating whether there's a
POSIX capability which would help.

Alternatively... are you sure that your normal user is a member of
dialout, plugdev, input and so on? What sort of device is it?

MarkMLl