(please use the "plain" text, much easier to answer).
Hi, Peter, I think you misread the error message. There is no error about
initialize_equipment(), the error is about interrupt_configure(). initialize_equipment() is just
one of the functions that calls it.
The cause of the error most likely is a mismatch between the declaration of
interrupt_configure() in mfe.h and the definition of this function in your program (in
feMotor.c, I guess).
Sometimes this mismatch is hard to identify just by looking at the code.
One fool-proof method to debug this is to extract the actual function prototypes from your
object files, both the declaration ("U") in mfe.o and the definition ("T") in your program
should be identical:
nm feMotor.o | grep -i interrupt | c++filt
0000000000000f90 T interrupt_configure(int, int, long) <--- should be this
nm ~/packages/midas/lib/libmfe.a | grep -i interrupt | c++filt
U interrupt_configure(int, int, long)
If they are different, you adjust your program until they match. One way to ensure the
match is to copy the declaration from mfe.h into your program.
K.O.
<p> </p>
<table align="center" cellspacing="1" style="border:1px solid #486090; width:98%">
<tbody>
<tr>
<td style="background-color:#486090">Peter Kunz wrote:</td>
</tr>
<tr>
<td style="background-color:#FFFFB0">
<p>After upgrading to the lastes MIDAS version I got the DAQ frontend of my
application running by changing all compiler directives from cc to g++ and using</p>
<p>#include "mfe.h"</p>
<p>extern HNDLE hDB</p>
<p> extern "C" { <br />
#include <CAENComm.h> <br />
}</p>
<p>With these changes everything seems to work fine.</p>
<p>However, I'm having trouble with a slow control frontend using a
tcpip driver. It compiled well with the older MIDAS version. Even though all the functions in
question are defined in the frontend code, the following error comes up:</p>
<div style="background:#eee;border:1px solid #ccc;padding:5px 10px;">g++
-o feMotor -DOS_LINUX -Dextname -g -O2 -fPIC -Wall -Wuninitialized -fpermissive
-I/home/pkunz/packages/midas/include -I. -I/home/pkunz/packages/midas/drivers/bus
/home/pkunz/packages/midas/lib/libmidas.a feMotor.o
/home/pkunz/packages/midas/drivers/bus/tcpip.o cd_Galil.o
/home/pkunz/packages/midas/lib/libmidas.a /home/pkunz/packages/midas/lib/mfe.o -lm -lz
-lutil -lnsl -lpthread -lrt<br />
/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function
`initialize_equipment()':<br />
/home/pkunz/packages/midas/src/mfe.cxx:687: undefined reference to
`interrupt_configure(int, int, long)'<br />
/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function
`readout_enable(unsigned int)':<br />
/home/pkunz/packages/midas/src/mfe.cxx:1236: undefined reference to
`interrupt_configure(int, int, long)'<br />
/usr/bin/ld: /home/pkunz/packages/midas/src/mfe.cxx:1238: undefined
reference to `interrupt_configure(int, int, long)'<br />
/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function `main':
<br />
/home/pkunz/packages/midas/src/mfe.cxx:2791: undefined reference to
`interrupt_configure(int, int, long)'<br />
/usr/bin/ld: /home/pkunz/packages/midas/src/mfe.cxx:2792: undefined
reference to `interrupt_configure(int, int, long)'<br />
collect2: error: ld returned 1 exit status<br />
make: *** [Makefile:36: feMotor] Error 1</div>
<p> I guess the the aforementioned DAQ frontend compiles because
its equipment definitions don't call on the function `initialize_equipment()', but I
can't figure out why it doesn't work. Help is appreciated. P.K.</p>
</td>
</tr>
</tbody>
</table>
<p> </p> |