Experimental Physics and
Industrial Control System

Benjamin Franksen <[email protected]> · Thu, 3 Nov 2011 23:35:50 +0100

Am Donnerstag, 3. November 2011, um 22:40:55 schrieb Andrew Johnson:
> On 2011-11-03 Martin Konrad wrote:
> > Please make sure that you have something like
> >
> > LIBS += -L$$(EPICS_BASE)/lib/$$(EPICS_HOST_ARCH) \
> >
> >     -lca \
> >     -lCom \
> >     -L$$(QCAFRAMEWORK)/qwt-5.2.1/lib \
> >     -lqwt
>
> It's possible that your link order might be a problem, make sure that you
> link against the ca and Com libraries *after* linking any libraries that
> calls them.  In the above case I would suggest moving the -lca and -lCom
> options after the -lqwt.

A quick and dirty method to check that w/o much experimentation is to simply
repeat the whole bunch of -l<libname> options i.e. write

   -lca -lCom -lqwt -lca -lCom -lqwt

If that works ythen ou know what causes the problem and you can then try to
minimize again by finding the correct order... but note that in case two or
more of the libraries you need have circular dependencies you might actually
/have/ to repeat some of them on the command line.

Cheers
Ben

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System