Re: Asyn 4.8 compile error with Linux GPIB

[Andrew Johnson <anj@aps.anl.gov>]

Guy Jennings wrote:
> If you look at the .la file with a text editor it should be 
> human-readable and
> should contain a line like 'libdir=/usr/lib' which tells where libtool 
> thought
> that the real .a (or .so) library was to be installed.

Guy is correct; IIRC the .la file is actually a shell script which 
programs that use libtool seem to be able to use instead of a library 
somehow before they've been properly installed (it may be that this is 
only possible as a shared library).  The real libgpib.a (or maybe 
libgpib.so) file should be available in a hidden directory inside the 
same directory where the .la file is - you'll have to use 'ls -a' to 
find that directory though as I don't remember what the naming 
convention is that it uses; its name might be mentioned in the .la file 
itself too.

- Andrew

> On Jul 16, 2007, at 4:03 PM, Jiro Fujita wrote:
>
> > I originally installed the driver from National Instrument.  Then,
> > when I realized that it appears that Asyn wants to use Linux GPIB
> > package library, according to asynDriver documentation
> > (http://www.aps.anl.gov/epics/modules/soft/asyn/R4-8/asynDriver.html#Linux-gpib), 
> >
> > I downloaded linux-gpib-3.2.09, did make and make install.
> > I don't see libgpib.a anywhere on my machine: not in the same
> > directory as libgpib.la nor where I compiled.
> > It appears that at some point, libgpib.a has gotten renamed to
> > libgpib.la in Linux GPIB package library.  There has been some
> > references of libgpib.a in older Linux GPIB package library (at least
> > old version, I see a reference of it).
> > I have not tracked down far enough to see where the reference to
> > libgpib.a is made in Asyn (the assumption is that I need to change a
> > few lines somewhere).
> >
> >
> > On 7/16/07, Andrew Johnson <anj@aps.anl.gov> wrote:
> > > Hi,
> > >
> > > Jiro Fujita wrote:
> > > > I have been trying to compile Asyn 4-8 with Linux GPIB support.  I am
> > > > using a National Instrument PCI GPIB card with EPICS Base 3.14.9 on a
> > > > Scientific Linux 4.2.  The card is recognized by the system.  I have
> > > > installed linux-gpib-3.2.09.
> > > > When I try to compile Asyn, I get the following error:
> > >
> > > ...
> > >
> > > > I looked for libgpib.a, but I don't see it on my machine.  Instead, I
> > > > find libgpib.la.  Does anybody have an idea how to fix this??
> > >
> > > I have no experience with your specific problem, but I do know that a
> > > libXXX.la file is usually a version of a library created by an
> > > application that uses GNU libtool before it is installed using 'make
> > > install'.
> > >
> > > Did you compile the National Instruments libgpib.la program yourself?
> > > If so, try doing a 'make install' in that directory which in my
> > > experience will cause the appropriate libgpib.a file to be created and
> > > installed in the appropriate location.  If you can't do that because you
> > > don't have write access to the target directory you might need to re-run
> > > the ./configure program in the GPIB build area specifying a
> > > --prefix=/path/to/somewhere.
> > >
> > > As an alternative, you can try looking for a hidden directory in the
> > > same directory as the libgpib.la file which I think will contain the
> > > actual libgpib.a file that you're looking for.
> > >
> > > HTH,
> > >
> > > - Andrew
> > > --
> > > The right to be heard does not automatically include
> > > the right to be taken seriously. -- Hubert H. Humphrey


--
The right to be heard does not automatically include
the right to be taken seriously. -- Hubert H. Humphrey