Re: [Linux-gpib-general] GPIB libs on 64-Bit machine

[Martin O. <mar...@de...>]

Hello Frank,

thanks for this fast answer. However I'm not sure whether I understand it. 
I was compiling the gpib-library on the 64-Bit machine. This was without 
any problem. Why there should be afterwards trouble?
Of cource, calls from 32-Bit programm into 64-bit libraries won't work. 
This is the reason why I cannot use labview with these gpib-libraries. 
(labview=32-Bit application, gpib=64-Bit library)

But if I compiled gpiblib on the 64-machine and hence have a 64-Bit 
gpib library then I should be able to access the gpib boards or devices 
via the 'ibtest' test programm. Or do I see this wrong?
If there is no compalibility in the ioctl structs between 32 and 64 Bit 
why does the compiler not complaint?

Cheers,
Martin


On Tue, 27 Nov 2007, Frank Mori Hess wrote:

> On Tuesday 27 November 2007 12:39, Martin Ohlerich wrote:
>> Hello all,
>>
>> I want to write gpib-DAQ software for a Keithley, which is accessed via
>> gpib-usb-hs from National Instruments. For this I took the gpib-library
>> from sourceforge : linux-gpib-3.2.09. The OS of my PC is Scientific
>> Linux 4. I successfully installed libgpib on a 32-Bit machine.
>> When I did the same steps on a 64-Bit machine I failed. The installation
>> itself worked without problems. Also the modules are loaded (I checked
>> this with help of lsmod). All permissions are set correctly (I even
>> tried as root). By 'cat /proc/bus/usb/devices' I saw that the
>> gpib-usb-hs was detected correctly. So everything looks fine.
>>
>> The result on the 64-Bit machine is, however, when starting 'ibtest' and
>
> calls from a 32 bit libgpib user space library into a 64 bit kernel won't
> work, as the ioctl structs are not 32/64 bit agnostic, and the gpib kernel
> driver doesn't implement compat_ioctl.
>
> -- 
> Frank
>
>