[En-Nut-Discussion] [RESENT] Nutdisc: cast from DISCOVERY_TELE* to int loses precision

Ole Reinhardt ole.reinhardt at embedded-it.de
Wed May 30 14:10:34 CEST 2012

Hi Uwe,

sorry, I missed your last Mail on this topic.

> on my Opensuse 12.1 X86-64 system, compilation aborts in nutdisc with 
> udpthread.cpp: In member function ‘virtual void* CUdpThread::Entry()’:
> udpthread.cpp:155:35: error: cast from ‘DISCOVERY_TELE*’ to ‘int’\
>  loses precision [-fpermissive]
> make[2]: *** [nutdisc-udpthread.o] Fehler 1

I just looked into the code and it seems that there is a 64bit pointer
castet to an int. I think an int is still defined as 32 bit here?

Unfortunately I don't know wxWidgets event handling, therefore I don't
clearly understand what "event.SetInt((int)dist);" does. But I think the
pointer to the discovery telegram shall be an argument to this event.
Casting it to a 32 bit value will definately fail.

> By adding -fpermissev as below, things compile. Is this the right solution
> or has anybody a better fix?

This will only suppress the warning, right?

So I think the code must be reworked to pass a correct pointer instead
of a 32 bit integer.




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