Compiling on unbutu 20.10 to distibute an OEL7 service
lazarus / 1-Linux

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auRazor · 2021-01-11 05:50

Hello,

I have converted a Delphi service application into a freepascal Daemon
application. I am compiling on ubuntu 20.10 and it works fine but when
I run the executable on an OEL7 server, that has no GUI, I am getting
this error:

libgdk-x11-2.0.so.0: cannot open shared object file: No such file or
directory

The application had zeoslib which I have used on another CLI with no
issue and the Indy components. I want to remove this dependency as I
am unable and unwilling to install xwindows. I have gone through all
files and removed

I have removed LCLIntf, LCLType, Graphics, Controls, Forms, Dialogs
from the project files and left  SysUtils, Classes. ldd is showing the
so as a dependency.

How can I find what is loading this dependency or is there a switch to
exclude it?

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auRazor · 2021-01-11 06:07

Hmm a bit more research seems to indicated that Indy may be the
problem. Has anyone been able to use Indy in a non GUI environment?
Can anyone suggest an alternative to listening for UDP/TCP ports?

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MarkMLl · 2021-01-11 09:36

I can't comment directly on Ubuntu and Indy. However handling TCP and
UDP ports depends on exactly what you're doing: if you're handling a
standard protocol then stick to well-used components, but if you're
doing something non-standard you're often as not better off setting up
a thread and going direct to the (Berkeley) sockets API.

Remember that low-numbered ports (can't remember whether it's < or <=
1024) need special handling on unix.

MarkMLl

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auRazor · 2021-01-21 04:16

This turned out to be LCLwidgets=gui when I set to nogui it ran fine
on a server with no GUI