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I suspect that a combination of CAP_IPC_LOCK and/or CAP_IPC_OWNER capabilities applied to the executable will probably help. See setcap man page.
@Anshul
According to the documentation, yes. How to access this memory segment from the other non-Qt process is OS specific.
Hi,
to use Qt classes you need a Qt Project (set INCLUDE_PATH and link libraries); BTW you can implement the background program using Qt (without GUI)