[etherlab-users] Linker problems with stable-1.5 patched with the latest rtdm-patch

[Graeme Foot]

Hi,

In that patch I integrated the functions into the ethercat lxrt library.

My library paths are:
  -L=/usr/realtime/lib

My libraries are:
  -lm \
  -lrt \
  -lethercat \
  -llxrt

My includes are:
  -I=/usr/realtime/include

In the source files:
#include <ecrt.h>       // for standard ethercat functions
#include <ec_rtdm.h>    // for rtdm ethercat functions


We are using buildroot to build our system so we also use the --sysroot compiler flag.


I don't have a "/opt/etherlab/lib" directory.  I can't see anything else particularly different.


Regards,
Graeme.



(Most thanks for the RTDM patch go to Moehwald GmbH, B.Benner.  I'm just massaging it for my requirements.)



-----Original Message-----
From: WIEGAND Ralf [mailto:Ralf.Wiegand at hexagonmetrology.com] 
Sent: Tuesday, 13 March 2012 09:39
To: Graeme Foot
Cc: etherlab-users at etherlab.org
Subject: Linker problems with stable-1.5 patched with the latest rtdm-patch

Hello Graeme,

first of all, thanks for the great job on the rtdm-patch.

I am trying to use your latest rtdm-patch for the stable-1.5 on revision 2266 and
get some problems during linking my own application. There are undefined references
to every ecrt_rtdm_*** library function. I use the linker-flags "-L/usr/realtime/lib
-L/opt/etherlab/lib" and "-llxrt -lrtdm -lethercat". The patch, compilation and
installation of the master runs without any problems. The ld is configured to search
libraries under /usr/realtime/lib and /opt/etherlab/lib. I also checked the content
of the libethercat library with readelf, but all called library-functions are listed
in the output. When i try to read out the ELF information with readelf of the 
ec_rtai_rtdm_example, i get an error that the file isn't an ELF-file.

My system is debian based (lenny) with kernel 2.6.32.11 and rtai-3.8.1.

Do you or anybody on the list have any idea to solve the problem or give me a hint ?


Regards,

Ralf Wiegand


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